1.ApplicationNumber: US-60909556-A
1.PublishNumber: US-2864800-A
2.Date Publish: 19581216
3.Inventor: GROOTE MELVIN DE
SHEN KWAN-TING

4.Inventor Harmonized: DE GROOTE MELVIN()
KWAN-TING SHEN()

5.Country: US
6.Claims:

7.Description:
(en)Unite ii 2,864,800 AROMATIC POLYEPOXIDE TREATED DERIVA- TIVES F ALKYLENE ()XiDE-AMINE MODI- FlED-PHENOLIC RESINS, AND METHOD OF MAKING S Melvin De Groote, St. Louis, and KWan-Ting Shen, Brentwood, Mo., assignors to Petrolite Corporation, Wilmington, Del., a corporation of Delaware N0 Drawing. Original application June 10, 1953, Serial 1x31322322 n3 Patent No. 2,792,364, dated May ivi e and this a lication Se ternber 11 1956, Serial No. 609,095 Pp p 7 Claims. (Cl. ass-45.1
tries as Well as with methods of manufacturing the new chemical products or compounds which are of outstanding value in demulsification.
The present invention is concerned with a 3-step manufacturing process involving (1) condensing certain phenol aldeyhde resins, hereinafter described in detail, with certain cyclic amidines, hereinafter described in detail,
and formaldehyde; (2) oxyalkylation of the condensation product with certain monoepoxides, hereinafter described in detail; and (3) oxyalkylation of the previously oxyalkylated resin condensate with certain non-aryl polyepoxides, also hereinafter described in detail.
The present invention is characterized by the use of compounds derived from diglycidyl ethers which do not introduce any hydrophobe properties in its usual meaning but in fact are more apt to introduce hydrophile properties. Thus, the diepoxides employed in the present invention are characterized by the fact that the divalent radical connecting the terminal epoxide radicals contains less than 5 carbon atoms in 'an uninterrupted chain The diepoxides employed in the present process are obtained from glycols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, glycerol, diglycerol, triglycerol, and similar compounds. Such products are well known and are characterized by the fact that there are not more than 4 uninterrupted carbon atoms in any group which is part of the radical joining the epoxide groups. Of necessity such diepoxides must be nonaryl or aliphatic in character. The diglycidyl ethers of co-pending application, Serial No. 350,535, are invariably and inevitably aryl in character.
The diepoxides employed in the present process are usually obtained by reacting a glycol or equivalent compound, such as glycerol or diglycerol, with epichlorohydrin and subsequently with an alkali. Such diepoxides have been described in the literature and particularly the patent literature.
Reference to being themoplastic characterizes products as being liquids at ordinary temperature or readily convertible to liquids by merely heating below the point of pyrolysis and thus differentiates them from infusible resins. Reference to being soluble in an organic solvent means any of the usual organic solvents such as alcohols, ketones, esters, ethers, mixed solvents, etc. Reference to solubility is merely to differentiate from a reactant which is not soluble and might be not only insoluble but also infusible. Furthermore, solubility is a factor insofar that it sometimes is desirable to dilute the compound containing the epoxy rings before reacting with an oxyalkylated amine condensate. In such instances, of course, the solvent selected would have to be one which is not susceptible to oxyalkylation, as, for example, kerosene, benzene, toluene, dioxane, possibly various ketones, chlorinated solvents, dibutyl ether, dixhexyl ether, ethyleneglycol diethylether, diethyleneglycol diethylether, and dimethoxytetraethyleneglycol.
The expression epoxy is not usually limited to the 1,2-epoxy ring. The 1,2-epoxy ring is sometimes referred to as the oxirane ring to distinguish it from other epoxy rings. Hereinafter the word epoxy unless indicated otherwise, will be used to mean the oxirane ring, i. e., the 1,2-epoxy ring. Furthermore, where a compound has two or more oxirane rings they will be referred to as polyepoxides. They usually represent, of course, 1,2-epoxide rings or oxirane rings in the alphaomega position. This is a departure from the standpoint of strictly formal nomenclature as in the example of the simplest diepoxide which contains at least 4 carbon atoms and is formally described as 1,2-epoxy-3,4-epoxybutane- (1,2,-3,4-diepoxybutane).
It well may be that even though the previously suggested formula represents the principal component, or components, of the resultant or reaction product described in the previous text, it may be important to note that somewhat similar compounds, generally of .much higher molecular weight, have been described as complex resinous epoxides which are polyether derivatives of polyhydric compounds containing an average of more than one epoxide group per molecule and free from functional groups other than epoxide and hydroxyl groups. The compounds here included are limited to the monomers or the low molal members of such series and generally contain two epoxide rings per molecule and may be entirely free from a hydroxyl group. This is important because the instant invention is directed towards products which are not insoluble resins and have certain solubility characteristics not inherent in the usual thermosetting resins. Simply for purpose of illustration to show a typical diglycidyl ether of the kind herein employed reference is made to the following formula:
or if derived from cyclic diglycerol the structure would be or the equivalent compound wherein the ring structure .involves only 6 atoms, thus:
l Commercially available compounds seem to be largely the former with comparatively small amounts, in fact, comparatively minor amounts, of the latter.
Having obtained an acyclic reactant having generally 2 epoxy rings as depicted in the next to last formula preceding, or low molal polymers thereof, it becomes obvione the reaction can take place with any oxyalkylated phenolaldehyde resin condensate by virtue of the fact that there are always present either phenolic hydroxyl radicals or alkanol radicals resulting fromthe oxyalkylation of the phenolic hydroxyl radicals; there" may be present reactive hydrogen atoms attached to a nitrogen atom or an oxygen atom, depending on whether initially there was present a hydroxylated group attached to an amino hydrogen group or a secondary "amino group. In any event there is always a multiplicity of reactive hydrogen atoms present in the oxyalkylated amine-modified phenolaldehyde resin.
To illustrate the products which represent the subject matter of the present invention reference will be made to a reaction involving a mole of the oxyalkylating agent, i. e., the compound having 2 oxirane rings and an oxyalkylated amine condensate. Proceeding with the ex ample previously described it is obvious the reaction ratio of 2 moles of the oxyalkylated amine condensate to one mole of the oxyalkylating agent gives a product which may be indicated as follows:
in which n' is a small whole number less than 10, and usually less than 4, and including 0, and R represents a divalent radical as previously described being free from any radical having more than 4 uninterrupted carbon atoms in a single chain, and the characterization oxy alkylated condensate is simply an abbreviation for the condensate which is described in greater detail subsequently.
Such final product in turn also must be soluble but solubility is not limitedto an organic solvent but may include water, or for that matter, a solution of water containing an acid such as hydrochloric acid, acetic acid, hydroxyacctic acid, etc. In other words, the nitrogen groups present, whether two or more, may or may not be-significantly basic and it is immaterial whether aqueous solubility represents an anhydro base or the free base (combination with water) or a salt form such as the acetate, chloride, etc. The purpose in this instance is to differentiate from insoluble resinous materials, particularly those resulting from gelation or cross-linking. Not only does this property serve to differentiate from instances where an insoluble material is desired, but also serves to emphasize the fact that in many instances the preferred compounds have distinct water-solubility or are distinctly dispersible in 5% gluconic acid. For instance, the products freed from any solvent can be shaken with 5 to times their weight of 5% gluconic acid at ordinary temperature and show at least some tendency towards being self-dispersing. The solvent which is generally tried is xylene. If xylene alone does not serve then a mixture of xylene and methanol, for instance, 80 parts of of xylene and 20 parts of methanol, or 70 parts of xylene and parts of methanol, can be used. Sometimes it is desirable to add a small amount of acetone to the xylenemethanol mixture, for instance, 5% to 10% of acetone. As oxyalkylation proceeds the significance of the basicity of any nitrogen group is obviously diminished.
The polyepoxide-treated condensates obtained in the manner described are, in turn, oxyalkylation-susceptible and valuable derivatives can be obtained by further reaction with ethylene oxide, propylene oxide, ethylene imine, etc.
Similarly, the polyepoxide-derived compounds can be reacted with a product having both a nitrogen group and a 1,2-epoxy group, such as 3-dialkylaminoepoxypropane. See U. S. Patent No. 2,520,093, dated August 22, 1950, to Gross.
Although the herein described products have a number of industrial applications, they are of particular value for resolving petroleum emulsions of the \vater-in-oil type that are commonly referred to as cut oil, roily oil, emulsified oil, etc., and which comprise fine droplets of naturally-occurring Waters or brines dispersed in a more or less permanent state throughout the oil which constitutes the continuous phase of the emulsion.
The new products are useful as wetting, detergent and leveling agents in the laundry, textile and dyeing industries; as Wetting agents and detergents in the acid washing of building stone and brick; as wetting agents and Spreaders in the application of asphalt in road building and the like; as a flotation reagent in the flotation separa tion of various aqueous suspensions containing negatively charged particles, such as sewage, coal washing waste water, and various trade wastes and the like; as germicides, insecticides, emulsifying agents, as, for example for cosmetics, spray oils, water-repellent textile finishes; as lubricants, etc.
As far as the use of the herein described products goes for purpose of resolution of petroleum emulsions of the water-in-oil type, we particularly prefer to use those which as such or in the form of the free base or hydrate, i. e., combination with water or particularly in the form of a low molal organic acid salt such as the gluconates or the acetate or hydroxy acetate, have sufficiently hydrophile character to at least meet the test set forth in U. S. Patent No. 2,499,368, dated March 7, 1950, to De Groote et al. In said patent such test for emulsification using a water-insoluble solvent, generally xylene, is described as an index of surface activity.
In the present instance the various condensation products as such or in the form of the free base or in the form of the acetate, may not necessarily be xylene-soluble although they are in many instances. If such compounds are not xylene-soluble the obvious chemical equivalent or equivalent chemical test can be made by simply using some suitable solvent, preferably a water-soluble solvent such as ethylene glycol diethylether, or a low molal alcohol, or a mixture to dissolve the appropriate product being examined and then mix with the equal weight of xylene, followed by addition of water. Such test is obviously the same for the reason that there will be two phases on vigorous shaking and surface activity makes its presence manifest. It is understood the reference in the hereto appended claims as to the use of xylene in the emulsification test includes such obvious variant.
For purpose of convenience, what is,said hereinafter will be divided into eight parts:
Part 1 is concerned with the hydrophile nonaryl polyepoxides and particularly diepoxides employed as reactants;
Part 2 is concerned with the phenol-aldehyde resin which is subjected to modification by condensation reaction to yield an amine-modified resin;
Part 3 is concerned with appropriate basic cyclic amidines which may be employed in the preparation of the herein-described amine-modified resins;
Part 4 is concerned with reactions involving the resin, the amine, and formaldehyde to produce specific products or compounds which are then subjected to oxyalkylation with monoepoxides;
Part 5 is concerned with the oxyalkylation of the products described in Part 4, preceding;
Part 6 is concerned with reactions involving the two preceding types of materials and examples obtained by such reactions. Generally speaking, this involves nothing more than a reaction between two moles of a previously-prepared oxyalkylated amine-modified phenolaldehyde resin condensate as described and one mole of a polyepoxide so as to yield a new and larger resin molecule or comparable product;
Part 7 is concerned with the resolution of petroleum emulsions of the water-in-oil type by means of the previously described chemical compounds or reaction prod nets; and i Part 8 is concerned with uses for the products herein described either as such or after modification, including any applications other than'those involving resolution of petroleum emulsions of the water-in-oil type.
PART 1 Reference is made to various patents as illustrated in the manufacture of the nonaryl polyepoxides and particularly diepoxides employed as reactants in the instant invention. More specifically, such patents are the following: Italian Patent No. 400,973, dated August 8, 1941; British Patent No. 518,057, dated December 10, 1938; U. S. Patent No. 2,070,990, dated February 16, 1937, to Groll et al.; and U. S. Patent No. 2,581,464, dated January 8, 1952, to Zech. The simplest diepoxide is probably the one derived from 1,3-butadiene or isoprene. Such derivatives are obtained by the use of peroxides or by other suitable means and the diglycidyl ethers may be indicated thus:
In some instances the compounds are essentially derivatives of etherized epichlorohydrin or methyl epichlorohydrin. Needless to say, such compounds can be derived from glycerol monochlorohydrin by etherization prior to ring closure. An example is illustrated in the previously mentioned Italian Patent No. 400,973:
CH2-GHCHz-O-CHa-CHOH2 Another type of diepoxide is diisobutenyl dioxide as described in aforementioned U. S. Patent No. 2,070,990, dated February 16, 1937, to Groll, and is of the following formula The diepoxides previously described may be indicated by the following formula:
H R R H HC (}ER"]1|' O -7CH in which R represents a hydrogen atom or methyl radical and R" represents the divalent radical uniting the two terminal epoxide groups, and n is the numeral 0 or 1. As previously pointed out, in .the case of the butadiene derivative, n is 0. In the case of diisobutenyl dioxide R" is CH CH and n is 1. In another example previously referred to R" is CH OCH and n is 1.
However, for practical purposes the only diepoxlde available in quantities other than laboratory quantities is a derivative of glycerol or epichlorohydrin. This particular diepoxide is obtained from diglycerol which is largely acyclic diglycerol, and epichlorohydrin or equivalent thereof in that the epichlorohydrin itself may supply the glycerol or diglycerol radical in addition to the epoxy rings. As has been suggested previously, instead of starting with glycerol or a glycerol derivative, one could start with any one of a number of glycols or polyglycols and it is more convenient to include as part of the terminal oxirane ring radical the oxygen atom that was derived from epichlorohydrin or, as might be the case, methyl epichlorohydrin. So presented the formula becomes:
H H H H H H HCCOO[R1]O-C-O-CH E H In the above formula R is selected from groups such as the following:
It is to be noted that in. the above epoxides there is a complete absence of (a) aryl radicals and (b) radicals in which 5 or more carbon atoms are united in a single uninterrupted single group. R is inherently hydrophile in character as indicated by the fact that it is specified that the precursory diol or polyol HOROH must be water-soluble in substantially all proportions, i. e., water miscible.
Stated another way, what is said previously means that a polyepoxide such as is derived actually or theoretically, or at least derivable, from the diol HOROH, in which the oxygen-linked hydrogen atoms were replaced by Thus, R(OH),,, where n represents a small whole number which is 2 or more, must be water-soluble. Such limitation excludes polyepoxides if actually derived or theoretically derived at least, from water-insoluble diols or water-insoluble triols or higher polyols. Suitable polyols may contain as many as 12 to 20 carbon atoms or thereabouts.
Referring to a compound of the type above in the formula in which R is C H (OH) it is obvious that reaction with another mole of epichlorohydrin with appropriate ring closure would produce a triepoxide or, similarly, if R hap ened to be C H (OH)OC H (OH), one could obtain a tetraepo-xide. Actually, such procedure generally yields triepoxides, or mixtures with higher epoxides and perhaps in other instances mixtures in which diepoxides are also present. Our preference is to use the diepoxides.
There is available commercially at least one diglycidyl ether free from aryl groups and also free from any radical having 5 or more carbon atoms in an uninterrupted chain. This particular diglycidyl ether is obtained by the use of epichlorohydrin in such a manner that approximately 4 moles of epichlorohydrin yield one mole of the diglycidyl ether, or, stated another way, it can be considered as being formed from one mole of diglycerol and 2 moles of epichlorohydrin so as to give the appropriate diepoxide. The molecular weight is ap proximately 370 and the number of epoxide groups per molecule are approximately 2.' For this reason in the first of a series of subsequent examples this particular diglycidyl ether is used, although obviously any of the others previously described would be just as suitable. For convenience, this diepoxide will be referred to as diglycidyl ether A. Such material corresponds in a general way to the previous formula.
Using laboratory procedure we have reacted diethyleneglycol with epichlorohydrin and subsequently with alkali so as to produceaproduct which, on examination, corresponded approximately to the following compound:
H H H H H H H H H H HC--CCOC-COCCO-CC--CH H H H H H H o o The molecular weight of the product was assumed to be 230 and the product was available in laboratory quantities only. For this reason, the subsequent table referring to the use of this particular diepoxide, which will be referred to as diglycidyl ether B, is in grams instead of pounds.
Probably the simplest terminology for these polyepoxides, and particularly diepoxides, to diflerentiate from comparable aryl compounds is to use the terminology epoxyalkanes and, more particularly, polyepoxyalkanes or diepoxyalkanes. The difficulty is that the majority of these compounds represent types in which a carbon atom chain is interupted by an oxygen atom, and, thus, they are not strictly alkane derivatives. Furthermore, they may be hydroxylated or represent a heterocyclic ring. The ring principal class properly may be referred to as polyepoxypolyglycerols, or diepoxypolyglycerols.
Other examples of diepoxides involving a heterocyclic ring having, for example, 3 carbon atoms and 2 oxygen atoms, are obtainable by the conventional reaction of combining erythritol with a carbonyl compound, such as formaldehyde or acetone so as to form the S-membered ring, followed by conversion of the terminal hydroxyl groups into epoxy radicals.
PART 2 It is well known that one can readily purchase on the open market, or prepare, fusible, organic solvent-soluble, water-insoluble resin polymers of a composition approximated in an idealized form by the formula .01! 'OH OH R R n R In the above formula n represents a small whole number varying from 1 to 6, 7 or 8, or more, up to probably or 12 units, particularly when the resin is subjected to heating under a vacuum as described in the literature. A limited sub-genus is in the instance of low molecular weight polymers where the total number of phenol nuclei varies from 3 to 6, i. e., n varies from 1 to 4; R represents an aliphatic hydrocarbon substituent, generally an alkyl radical having from 4 to carbon atoms, such as a butyl, amyl, hexyl, decyl or dodecyl radical. Where the divalent bridge radical is shown as being derived from formaldehyde it may, of course, be derived from any other reactive aldehyde having 8 carbon atoms or less.
Because a resin is organic solvent-soluble does not mean it is necessarily soluble in any organic solvent. This is particularly true where the resins are derived from trifunctional phenols as previously noted. However, even when obtained from a difunctional phenol, for instance, paraphenylphenol, one may obtain a resin which is not soluble in a nonoxygenated solvent, such as benzene, or xylene, but requires an oxygenated solvent such as a low molal alcohol, dioxane, or diethyleneglycol diethylether. Sometimes a mixture of the two solvents (oxygenated and nonoxygenated) will serve. See Example 9a of U. S. Patent No. 2,499,365, dated March 7, 1950, to De Groote and Keiser.
The resins herein employed as raw materials must be soluble in a nonoxygenated solvent, such as benzene or xylene. This presents no problem insofar that all that is required is to make a solubility test on commercially available resins, or else prepare resins which are xylene or benzene-soluble as described in aforementioned U. S.
Patent No. 2,499,368,0r in U. S. Patent No. 2,499,368, dated March 7, 1950, to De Groote and Keiser. In said patent there are described oxyalkylation-susceptible, fusible, nonoxygenated-organic solvent-soluble, water-insoluble, low-stage phenolaldehyde resins having an average molecular weight corresponding to at least 3 and not over 6 phenolic nuclei per resin molecule. These resins are difunctional only in regard to methylol-forming reactivity, are derived by reaction between a difunctional monohydric phenol and an aldehyde having not over 8 carbon .atoms and reactive toward said phenol, and are formed in the substantial absence of trifunctional phenols. The phenol is of the formula in which R is an aliphatic hydrocarbon radical having at least 4 carbon atoms and not more than 24 carbon atoms, and substituted in the 2,4,6 position.
If one selected a resin of the kind just described previously and reacted approximately one mole of the resin with two moles of formaldehyde and two moles of a cyclic amidine as specified, following the same idealized over-simplification previously referred to, the resultant product might be illustrated thus:
The cyclic amidine may be designed thus:
RI HN/ In conducting reactions of this kind one does not necessarily obtain a hundred percent yield for obvious reasons. Certain side reactions may take place. For instance, 2 moles of amine may combine with one mole of the aldehyde, or only one mole of the amine may combine with the resin molecule, or even to a very slight extent, if at all, 2 resin units may combine without any amine in the reaction product, as indicated in the following formulas:
As has been pointed out previously, as far as the resin unit goes one can use a mole of aldehyde other than formaldehyde, such as acetaldehyde, propionaldehyde or butyraldehyde. The resin unit may be exemplified thus:
OH I'- OH OH O m O R R n R in which R is the divalent radical obtained from the particular aldehyde employed to form the resin. For reasons which are obvious the condensation product obtained appears to be described best in terms of the method of manufacture.
As previously stated the preparation of resins, the kind herein employed as reactants, is well known. See previously mentioned U. S. Patent 2,499,368. Resins can be made using an acid catalyst or basic catalyst or a catalyst having neither acid nor basic properties in the ordinary sense or without any catalyst at all. It is preferable that the resins employed be substantially neutral. In other words, if prepared by using a strong acid as a catalyst such strong acid should be neutralized. Similarly, if a strong base is used as a catalyst it is preferable that the base be neutralized although we have found that sometimes the reaction described proceeded more rapidly in the presence of a small amount of a free base. The amount may be as small as a 200th of a percent and as much as a few 10ths of a percent. Sometimes moderate increase in caustic soda and caustic potash may be used. However, the most desirable procedure in practically every case is to have the resin neutral.
In preparing resins one does not get a single polymer, i. e., one having just 3 units, or just 4 units, or just 5 units, or just 6 units, etc. It is usually a mixture; for instance, one approximating 4 phenolic nuclei will have some trimer and pentamer present. Thus, the molecular weight may be such that it corresponds to a fractional value for n as, for example, 3.5, 4.5 or 5.2.
In the actual manufacture of the resins we found no reason for using other than those which are lowest in price and most readily available commercially. For purposes of convenience suitable resins are characterized in the following table:
Table I 01. Wt. of resin molecule (based on n+2) R"! derived n from- Example Position number of R Para. 882. 5
Ortho. Para Ortho- Tertiary butyl Secondary butyl.
Tertiary amyl Mixed secondary and tertiary amyl.
Dodecyl Tertiary butyl Tertiary amyl Nonyl Tertiary butyl Tertiary amyl N l ony Tertiary butyl cacao @030 Qu tdehyde. do.
Tertiary amyl Nonyl Tertiary butyl Tertiary amyl N l 10 PART 3 The expression cyclic amidines is employed in its usual sense to indicate ring compounds in which there are present either 5 members or 6 members, and having 2 nitrogen atoms separated by a single carbon atom supplemented by either two additional carbon atoms or three additional carbon atoms completing the ring. All the carbon atoms may be substituted. The nitrogen atom of the ring involving two monovalent linkages may be substituted. Needless to say, these compounds include members in which the substituents also may have one or more nitrogen atoms, either in the form of amino nitrogen atoms or in the form of acylated nitrogen atoms.
These cyclic amidines are sometimes characterized as being substituted imidazolines and tetrahydropyrimidines in which the two-position carbon of the ring is generally bonded to a hydrocarbon radical or comparable radical derived from an acid, such as a low molal fatty acid, a high molal fatty acid, or comparable acids such as polycarboxy acids.
Cyclic amidines obtained from oxidized wax acids are described in detail in co-pending Blair application, Serial No. 274,075, filed February 28, 1952. Instead of being derived from oxidized wax acids, the cylcic compounds herein employed may be obtained from any acid from acetic acid upward, and may be obtained from acids, such as benzoic, or acids in which there is a reoccurring ether linkage in the acyl radical. In essence then, with this difference said aforementioned co-pending Blair application, Serial No. 274,075, describes compounds of the following structure:
where R represents hydrocarbon radicals having up to approximately 30 carbon atoms and includes hydroxylated hydrocarbon radicals and also hydrocarbon radicals in which the carbon atom chain is interrupted by oxygen; n is the numeral 2 to 3, D represents hydrogen and organic radicals containing less than 25 carbon atoms, composed of the elements including C, N, O and H, and B represents hydrogen and hydrocarbon radicals containing less than 7 carbon atoms, with the proviso that at least three occurrences of B are hydrogen.
The preparation of an imidazoline substituted in the two-position by lower aliphatic hydrocarbon radicals is described in the literature and is readily carried out by reaction between a monocarboxylic acid or ester or amide and a diamine or polyarnine, containing at least one primary amino group, and at least one secondary amino group or a second primary amino group separated from the first primary amino group by two carbon atoms.
Examples of suitable polyamines which can be employed as reactants to form basic nitrogen-containing compounds of the present invention include polyalkylene polyamines such as ethylene-diamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and higher polyethylene polyamines, and also including 1,2-diaminopane, N-ethylethylenediamine, N,N-dibutyldiethylenetri-' pyrimidines substituted in the 2-position are the polyamines containing atleast one primary amino group and at least one secondary amino group, or another primary amino group separated from the first primary amino group by three carbon atoms. This reaction is generally carried out by heating the reactants to a temperature of 230 C. or higher, usually within the rangeof 250 C. to 300 C., at which temperatures water is evolved and ring closure is efiected. For details of the preparation of tetrahydropyrimidines, see German Patent No. 7 00,371, dated December 18, 1940, to Edmund Waldmann and August Chwala; German Patent No. 701,322, dated January 14, 1941, to Karl Miescher, Ernst Erech and Willi Klarer; and U. S. Patent No. 2,194,419, dated March 19, 1940, to August Chwala.
Examples of amine, suitable for this synthesis include 1,3-propylenediamine, trimethylenediamine, 1,3-diaminobutane, 2,4-diaminopentane, N-ethyl-trimethylenediamine, N-aminoethyltrimethylene diamine, aminopropyl stearylamine, tripropylenetetramine, tetrapropylenepentamine, high boiling polyamines prepared by the condensation of 1,3-propylene dichloride with ammonia, and similar diamines or polyamines in which there occurs at least one primary amino group separated from another primary or secondary amino group by three carbon atoms.
From a practical standpoint, as will be explained hereinafter, the polyethylene imidazolines are most readily available and most economical for use. Thus, broadly speaking, the present invention is concerned with a condensation reaction, in which one class of reactants are substituted ring compounds in which R is a divalent alkylene radical of the class of and in which D represents a divalent, non-amine, organic radical containing less than 25 carbon atoms, composed of elements from the group consisting of C, H, O, and n; Y represents a divalent, organic radical containing less than 25 carbon atoms, composed of elements from the group consisting of C, H, O, and N, and containing at least one amino group, and R is a member of the class consisting of hydrogen, aliphatic hydrocarbon radicals, hydroxylated aliphatic hydrocarbon radicals, cycloaliphatic hydrocarbon radicals, and hydroxylated cycloaliphatic hydrocarbon radicals; R is a member of the class consisting of hydrogen, aliphatic radicals and cycloaliphatic radicals, with the proviso that in the occurrence of the radicals R and R there be present at least one group of 8 to 32 uninterrupted carbon atoms. In the present instance, however, there is no limitation in regard to the radicals R and R".
What has been said previously in regard to the two above c-pcnding applications as far as substituted imidazolines are concerned is substantially the same as appears in Blair and Gross Reissue Patent No. 23,227, reissued May 9, 1950, and Monson Patent No. 2,589,198 dated April 11, 1952.
As to the six-membered ring compounds generally referred to as substituted pyrimidines, and more particularly as substituted tetra-hydropyrimidines, see U. S. Patent No. 2,534,828 dated December 19, 1950, to Mitchell et :11. With the modification as far as the in- 12 stant application goes, the hydrocarbon group R may have the same variation as when it is part of the fivemembered ring previously referred to and is not limited to an alkyl group having at least 10 carbon atoms as in the instance of the aforementioned U. S. Patent No. 2,534,828.
For purpose of the present invention there is selected from the broad case of compounds previousl described such members as meet the following limitations; (a) have present at least one basic secondary amino radical; and (b) be free from primary amino groups and especially basic primary amino groups. Such compoundsmay have two-ring membered radicals present instead ofone ringmembered radical and may or may not have present a tertiary amino radical or a hydroxyl radical, such as a hydroxy alkyl radical. A large number of compounds have been described in the literature meeting the above specifications, of which quite a few appear in the aforementioned issued U. S. patents. Examples selected from the patents include the following:
N-GH, CnHwC N--CH: 1'1
2-undccylimidazollne %NCH: Cn as-C N-CH:
Z-heptadecylimidazoline N-CH: 02115.0
N C H:
2H4.NH. C lllHfl 1-NdecylaminoethyL2-ethylimidazolinc N-CHz H.C
CaHa.NH. CrzHzs 1 d0decylaminopropylirnidazolinc NC H H.C
N-CH2 O:H4.NH .CzHaOCIELCnHzs 1-(stearoyloxye-thy])aminoethyliinidazoline 13 N-CH2 C2H4.NH.C2H4NH0 0.011Haa l-stearamidoethylaminoethylimidazoline N-C H---(] H a H ER- H-CHs 2-heptadecyl,4,5-dimethylimidazoline l-dodecylaminohexylimidazoline N-CH 11.0
)qH1z.NH.CzH4.O CmHas 1-stearoyloxyethylaminohexylimidazoline 2-heptadecy1,1-methy!amin0ethyltetrahydropyrimidine 4methy1,2-dodecyl,1-methylaminoethylaminoethyltetrahydropyrimid'me As has been pointed out previously, the reactants herein employed may have two substituted imidazolinerings or two substituted tetrahydropyrimidine rings. Such compounds are illustrated by the following formula:
Such compounds can be derived, of course, from tri- 14 ethylenetetramine, tetraethylenepentamine, pentaethylene hexamine, and higher homologues. The substituents may vary depending on the source of the hydrocarbon radical, such as the lower fatty acids and higher fatty acids, a resin acid, naphthenic acid, or the like. The group introduced may or may not contain a hydroxyl radical as in the case of hydroxyacetic acid, acetic acid, ricinoleic acid, oleic acid, etc.v
One advantageof a two-ring compound resides in the fact that primary amino groups which constitute the terminal radicals of the parent polyamine, whether a polyethylene amine or polypropylene amine, are converted so as to eliminate the presence of such primary amino radicals. Thus, the two-membered ring compound meets the previous specification in regard to the nitrogen-containing radicals.
Another procedure to form a two-membered ring compound is to use a dibasic acid. Suitable compounds are described, for example, in aforementioned U. S. Patent No. 2,194,419, dated March 19, 1940, to Chwala As to compounds having a tertiary amine radical, it is obvious that one can employ derivatives of polyamines in which the terminal groups are unsymmetrically alkylated. Initial polyamines of this type are illustrated by the following formula:
in which R represents a small alkyl radical such as methyl, ethyl, propyl, etc, and n represents a small whole number greater than unity such as 2, 3 or 4. Substituted imidazoline can only be formed from that part of the polyamine which has a primary amino group present. There is no objection to the presence of a tertiary amino radical as previously pointed out. Such derivatives, provided there is more than one secondary amino-radical present in the ring compound, may be reacted with an alkylene oxide, such as ethylene oxide, propylene oxide, glycide, etc., so as to convert one or more amino nitrogen radicals. into the corresponding hydroxy alkyl radical, provided, however, that there is still a residue secondary amine group. For instance, in the preceding formula if n represents 4 it means the ring compound would have two secondary nitrogen radicals and could be treated with a single mole of an alkylene oxide and still provide a satisfactory reactant for the herein described condensation reaction.
Ring compounds, such as substituted imidazolines, may be reacted with a substantial amount of alkylene oxide as noted in the preceding paragraph and then a secondary amino group introduced by two steps; first, reaction with an ethylene imine, and second, reaction with another mole of the oxide, or with an alkylating agent such as dimethyl sulfate, benzyl chloride, a low molal ester of a sulfonic acid, an alkyl bromide, etc.
As to oxyalkylated irnidazolines and a variety of suitable high molecular weight carboxy acids which may be the source of a substituent radical, see U. S. Patent No. 2,468,180, dated April 26, 1949, to De Groote and Keiser.
Other suitable means may be employed to eliminate a terminal primary amino radical. If there is additionally a basic secondary amino radical present then the primary amino radical can be subjected to acylation notwithstanding the fact that the surviving amino group has no significant basicity. As a rule acylation takes place at the terminal primary amino group rather than at the secondary amino group, thus one can employ a compound such as 2-heptadecyl,1-diethylenediaminoimidazoline and subject it to acylation so as to obtain, for example, acetylated 2-heptadecyl,l diethylenediaminoimidazoline of the following structure:
Similarly, a compound having no basic secondary amino radical but a basic primary amino radical can be reacted with a mole of an alkylene oxide, such as ethylene oxide, propylene oxide, glycide, etc., to yield a perfectly satisfactory reactant for the herein described condensation procedure. This can be illustrated in the following manner by a compound such as 2-l1eptadecyl,Laminaethylimidazoline which can be reacted with a single mole of ethylene oxide, for example, to produce the hydroxy ethyl derivative of 16 Z-heptadecyl,1-amino-ethylimidazoline, which can be illustrated by the following formula:
C "Her-C Other reactants may be employed in connection with an initial reactant of the kind described above, to wit, 2-heptadecyl,1-amino-ethylimidazoline; for instance, reaction with an alkylcne irnine such as ethylene imine, propylene imine, etc. If reacted with ethylene imine the net result is to convert a primary amino radical into a secondary amino radical and also introduces a new primary amino group. If ethylene imine is employed, the net result is simply to convert 2-heptadecyl,l-aminoethylimidazoline into Z-heptadecyl,l-diethylene-diaminoimidazoline. However, if propylene imine is used the net result is a compound which can be considered as being derived hypothetically from a mixed polyalkylene amine, i. e., one having both ethylene groups and a propylene group between nitrogen atoms.
A more satisfactory reactant is to employ one obtained by the reaction of epichlorohydrin on a secondary alkyl amine, such as the following compound:
If a mole of Z-heptadecyl,l-aminoethylimidazoline is reacted with a mole of the compound just described, to wit,
the resultant compound has a basic secondary amino group and a basic tertiary amino group. See U. S. Patent No. 2,520,093 dated August 22, 1950, to Gross.
For purpose of convenience, what has been said by direct reference is largely by way of illustration in which there is present a sizable hydrophobe group, for instance, heptadecyl groups, pentadecyl groups, octyl groups, nonyl groups, etc. etc.
As has been pointed out, one can obtain all these comparable derivatives from low molal acids, such as acetic, propionic, butyric, valeric, etc. Similarly, one can employ hydroxy acids such as glycolic acids, lactic acid, etc. Over and above this, one may employ acids which introduce a very distinct hydrophobe effect as, for example, acids prepared by the oxyethylation of a low molal masts t? t alcohol, such as methyl, ethyl, propyLor the like, to produce compounds of the formula in which R is a low molal group, such as methyl, ethyl or propyl, and n-is a whole number varying from one up to or 20. Such compounds can be converted into the alkoxide and then reacted with an ester of chloroacetic, followed by saponification so as to yield compounds of the type R(OCH CH ),,OCH COOH in which n has its prior significance. Another procedure is to convert the compound into a halide ether such as in R(OCH CH ),,Cl in which n has its prior significance, and then react such halide ether with sodium cyanide so as to give the corresponding nitrile R(OCH CH ),,CN, which can be converted into the corresponding acid, of the following composition R(OCH CH ),,COOH. Such acids can also be used to produce acyl derivatives of the kind previously described in which acetic acid is used as an acylating agent.
What has been said above is intended. to emphasize the fact that the nitrogen compounds herein employed can vary from those which are strongly hydrophobe in character and have a minimum hydrophobe property.
Examples of decreased hydrophobe character are exemplified by Z-methylimidazoline, 2-propylimidazoline, and 2-butylimidazoline, of the following structures:
CtHi. C (17) N-CH2 N-CEz CsH1. C
N-CHz C4HB.C
PART 4 molecule cannot be defined satisfactorily by formula,
although it may be so illustrated in an idealized simplification, it is ditficult to actually depict the final product of the cogeneric mixture except in terms of the process itself.
A convenient piece of equipment for preparation of these cogeneric mixtures is a resin pot of the kind described in aforementioned U. S. Patent No. 2,499,368. In most instances the resin selected is not apt to be a fusible liquid at the early or low temperature stage of reaction if employed as subsequently described; in fact, usually it is apt to be a solid at distinctly higher tem peratures, for instance, ordinary room temperature. Thus, we have found it convenient to use a solvent and particularly one which can be removed readily at a comparatively moderate temperature, for instance, at 150 C. A suitable solvent is usually benzene, xylene, or a comparable petroleum hydrocarbon or a mixture of such or similar solvents. Indeed, resins which are not soluble except in oxygenated solvents or mixtures containing l 18 v such solvents are not here included as raw materials. The reaction can be conductedin such a way that the initial reaction, and perhaps the bulk of the reaction, takes place in a polyphase system. However, if desirable, one can use an oxygenated solvent such as a low-boiling alcohol, including ethyl alcohol, methyl alcohol, etc. Higher alcohols can be used or one can use a comparatively non-volatile solvent such as dioxane or the di ethylether of ethyleneglycol. One can also use a mixture of benzene or xylene and such oxygenated solvents. Note that the use ,of such oxygenated solvent is not required in the sense that it is not necessary to use an initial resin which is soluble only in an oxygenated solvent as just noted, and it is not necessary to have a single phase system for reaction.
Actually, water is apt to be present as a solvent for the reason that in most cases aqueous formaldehyde is employed, which may be the commercial product which is approximately 37%, or it may be diluted down to about 30% formaldehyde. However, para-formaldehyde can be used but it is more difl' cult perhaps to add a solid material instead of the liquid solution and, everything else being equal, the latter is apt to be more economical. In'any event, water is present as water of reaction. If thesolvent is completely removed at the end of the process, no problem is involved if the material is used for any subsequent reaction. However, if the reaction mass is going to be subjected to some further reaction where the solvent may be objectionable, as in the case of ethyl or hexyl alcohol, and if there is to be subsequent oxyalkylation, then, obviously, the alcohol should not be used or else it should be removed. The fact that an oxygenated solvent need not be employed,-of course, is an advantage for reasons stated.
The products obtained, depending on the reactants selected may bewater-insoluble or water-dispersible, .or water-soluble, or close to being water-soluble. Water solubility is enhanced, of course, by making a solution in the acidified vehicle such as a dilute solution, for instance, a 5% solution of hydrochloric acid, acetic acid, hydroxyacetic acid, etc.
We have found no particular advantage in using a low temperature in the early stage of the reaction because, and for reasons explained, this is not necessary although it does apply in some other procedures that, in a general way, bear some similarity to the present procedure. There is no objection, of course, to giving the reaction an opportunity to proceed as far as it will at some low temperature, for instance, 30 to 40 but ultimately one must employ the higher'temperature in order to obtain products of the kind herein described. If a lower temperature reaction is used initially the period is not critical,
in fact, it may be anything from a few hours up to 24 hours. We have not found any case where it was necessary or even desirable to hold the low temperature stage for more than 24 hours. In fact, we are not convinced there is any advantage in holding it at this stage for more than 3 or 4 hours at the most. This, again, is a matter of convenience largely for'one reason. heating and stirring the reaction mass there is a tendency for formaldehyde to be lost. Thus, if the reaction can be conducted at a lower temperature so as to use up part of the formaldehyde at such lower temperature, then the amount of unreacted formaldehyde is'decreased subsequently and makes iteasier to prevent any loss. Here, again, this lower temperature is not necessary byvirtue of heat convertibility as previously referred to.
If solvents and reactants are selected so the reactants and products of reaction are mutually soluble, then agitation is required only to the extent that it helps cooling or helps distribution of the incoming formaldehyde. This mutual solubility is not necessary as previously pointed out but may be'convenient under certainv circumstances. On the other hand, if the products are not mutually soluble then agitation should be more vigorous Ini 19 for the reason thatreaction probably takes place principally atthe interfaces and the more vigorous the agitation the moreinterfacialarea. The general procedure employed is invariably the same when adding the resin and the selected solvent, such as benzene or xylene. Refluxing should be long enough to insure that the resin added, preferably in a powdered form, is completely dissolved. However, if the resin is prepared as such it may be added in solution form, just as preparation is described in aforementioned U. S. Patent 2,499,368. After the resin is in complete solution the polyamine is added and .stirred. Depending on the polyamine selected, it may or may not be soluble in the resin solution. If it is not soluble in the resin solution it may be soluble in the aqueous formaldehyde solution. If so, the resin then will dissolve in the formaldehyde solution as added, and if not, it is even possible that the initial reaction mass could be a three-phase system instead of a two-phase system although this would. be extremely unusual. This solution, or mechanical mixture,
if not completely soluble is cooled to at least the reaction temperature or somewhat below, for example 35 C. or slightly lower, provided this initial low temperature stage is employed. The formaldehyde is then added in a suitable form. For reasons pointed out we prefer to use a solution and whether tousea commercial 37% concentration is. simply a matter of choice. In large scale manufacturing there may be some advantage in using a 30% solution of formaldehyde but apparently this is not true on a small laboratory scale or pilot plant scale. 30% formaldehyde may tend to decrease any formaldehyde loss .or make iteasier to control unreacted formaldehyde loss.
Returning again to the preferred method of reaction and particularly from the. standpoint of laboratory procedure employingaa glass resin pot, when the reaction has proceeded as one can reasonably expect at a low temperature, for instance, after holding the reaction mass with or without stirring, depending on whether or not it is homogeneous, .at 30 or.40 C. for4 or hours,
or at the most, up to -24 hours, we thencomplete the reaction by raising thetemperature up to 150 C., or thereabouts as required. The initial low temperature procedure team be eliminated or reduced to merely the shortest period of time which avoids loss of polyamine .or formaldehyde. At a higher temperature we use a phase-separating trap and subject the mixture to reflux condensation until the water of reaction and the water of solution of the formaldehyde is eliminated.
We then permit the temperature to rise to somewhere about 100 C., and generally slightly above 100 C., and below 150" C. by eliminating ,the solvent or part of the solvent so the reaction mass stays within this predetermined range. This period of heating and refluxing, after the water is eliminated, is continued until the reaction mass is homogeneous and then for one to three hours longer. Theremoval of the solvents is conducted in a conventional manner in the same way as the removal of solvents in resin manufacture as described in aforementioned U. S. Patent No. 2,499,368.
Needless to say, as far as the ratio of reactants goes we have invariably employed approximately. one mole of the resin based on the molecular weight of the resin molecule, 2 moles of the secondary polyamine and 2 moles of formaldehyde. In some instances we have added a trace of caustic as an added catalyst but have found no particular advantage in this. In other cases we have used a slight excess of formaldehyde and, again, have not found any particular advantage in this. In other cases we have used a slight excess of the nitrogen compound, and, again, have not found any particular advantage in so doing. Whenever feasible we have checked the completeness of reaction in the usual ways, including the amount of water of reaction, molecular weight, and particularly in some instances have checked tacky resin.
Example 1b The phenol-aldehyde resin is the one that has been identified previously as Example 1a. It was obtained from a para-tertiary butylphenol and formaldehyde. The
resin Was prepared using an .acid catalyst which was completely neutralized at the end of the reaction. The molecular weight of the resin was 882.5. This corresponded to an average of about 3% phenolic nuclei, as the value for a which excludes the 2 external nuclei, i. e., the resin was largely a mixture having 3 nuclei and 4 nuclei excluding the 2 external nuclei, or 5 and 6 overall nuclei. The resin so obtained in a neutral state had a light amber color.
882 grams of the resin identified as 1a, preceding were powdered and mixed with a somewhat lesser amount of xylene, i. e., 600 grams. The mixture was refluxed until solution was complete. It was then adjusted to approximately 35 C. and 612 grams of 2-oleylimidazoline, previously shown in a structural formula as ring compound (3), were added. The mixture was stirred vigorously and formaldehyde added slowly. in this particular case the formaldehyde used was a 37% solution and 162 grams were added in approximately 3 hours. The mixture was stirred vigorously and kept within a range of approximately 40 to 44 C., for about 16 /2 hours. At the end of this time it was refluxed, using a phase-separating trap and a small amount of aqueous distillate withdrawn from time to time. The presence of unreacted formaldehyde was noted. Any unreacted formaldehyde seemed to disappear in approximately three hours after refluxing started. As soon as the odor of formaldehyde was no longer detectible the phase-separating trap was set so as to eliminate all the water of solution and reaction. After the water was eliminated part of the xylene was removed until the temperature reached approximately 148 C. The mass was kept at this higher temperature for 3 or 4 hours. During this time any additional water, which was probably water of reaction which had formed, was eliminated by means of the trap. The residual xylene was permitted to stay in the cogeneric mixture. A small amount of the sample was heated on a water bath to remove the excess xylene. The residual material was dark red in color and had the consistency of a thick sticky fluid or The. overall reaction time was approximately 30 hours. In other examples it varied from as little as 24 hours up to approximately 38 hours. The time can be reduced by cutting the low temperature period to approximately 3 to 6 hours.
Note that in Table II following there are a large number of added examples illustrating the same procedure. In each. case the initial mixture was stirred and held at a fairly low temperature 30 to 40 C.) for a period of several hours. Then refluxing was employed until the odor of formaldehyde disappeared. After the odor of formaldehyde disappeared the phase'separating trap was employed to separate out all the water, both the solution and condensation. After all the water had been separated enough xylene was taken out to have the final product reflux for several hours somewhere in the range of to 150 C., or thereabouts. Usually the mixture yielded a clear solution by the time the bulk of the water, or all of the water, had been removed.
Note that as pointed out previously, this procedure is illustrated. by 24 examples in Table II.
Table II Amt of Strength of Reae- Reac- Max. Ex. Resin Amt, Amine used amnle formaldehyde Solvent used tion tion distill. N0. used grs. rams soln. and and amt. temp, time, temp.,
g amt. 0. hrs. 0.
882 612 37, 162 g..-- Xylene 600 g 20-25 30 148 480 306 37", 81 Xylene 450 g 21-23 24 145 633 306 37% 81 g Xylene 600 g 20-22 28 150 441 281 30} 100 g Xylene 400 g.. 22-24 28 148 480 281 30 100 g-.-. Xylene 450 g 21-23 30 148 633 281 37% 81 Xylene 600 g 21-25 26 146 441 394 Xylene 400 g 1% 480 394 1 633 394 38 150 473 379 36 149 511 379 24 142 665 379 26 145 441 395 38% 81 Xylene 425 g- 22-28 28 146 480 395 37% 81 g Xylene 450 g 23-30 27 150 595 395 37; 81 g Xylene 550 g 20-24 29 147 441 99 37, 81 g Xylene 440 g 20-21 30 148 480 99 Xylene 480 g 21-26 32 146 511 99 Xylene 600 g 21-23 26 v 147 498 113 Xy 29 150 542 113 Xylene 500 32 150 547 113 Xylene 550 37 150 441 126 Xylene 440 g 20-22 30 150 595 126 Xylene 600 g. 20-25 36 140 391 Amine 19 126 Xylene 400 g 20-24 32 152 The amino numbers referred to are the rmg compounds 25 drawn a substantial portlon at the end of each step and identified previously by number in Part 3.
PART The preparation of oxyalkylated derivatives of products of the kind which appear as examples in Part 4 is carried out by procedures and in apparatus which are substantially conventional for oxyalkylation, and which will be illustrated by the following examples. In preparing the products of the examples, a conventional autoclave with requiredaccessories for oxyalkylation having a capacity of about 25 gallons is used.
Example The oxyalkylation-susceptible compound employed is the one previously described and designated as Example 1b. Condensate 1b was in turn obtained from 2-oley1- imidazoline and the resin previously identified as Example la. Reference to Table I shows that this particular resin is obtained from paratertiarybutylphenol and formaldehyde. 15.18 pounds of this resin condensate were dissolved in 6 pounds of solvent (xylene) along with 1.0 pound of finely powdered caustic soda as a catalyst. Adjustment was made in the autoclave to operate at a temperature of approximately 125 C. to 135 C., and at a pressure of about to pounds. In some subsequent examples pressures up to 35 pounds were employed.
The time regulator was set so as to inject the ethylene oxide in approximately three-quarters of an hour and .then continue stirring for 15 minutes or longer, a total time of one hour. The reaction went readily, and, as a matter of fact, the oxide was taken up almost immediately. The speed of reaction, particularly at the low pressure, undoubtedly was due in a large measure to excellent agitation and also to the comparatively high concentration of catalyst. The amount of ethylene oxide introduced was equal in weight to the initial condensation product, to wit, 15.18 pounds. This represented a molal ratio of 34.5 moles of ethylene oxide per mole of condensate.
The theoretical molecular weight at the end of the reaction period was 3036. A comparatively small sample, less than 50 grams, was withdrawn merely for examination as far as solubility or emulsifying power was conccrned and also for the purpose of making some tests on various oil field emulsions. The amount withdrawn was so small that no cognizance ofthis fact is included in the data, or subsequent data, or in the data presented in tabular form in subsequent Tables III and IV.
The size of the autoclave employed was 25 gallons. In innumerable comparable oxyalkylations we have with continued oxyalkylation on a partial residual sample. This was not the case in this particular series. Certain examples were duplicated as hereinafter noted and subjected to oxyalkylation with a different oxide.
Example 2c This example simply illustrates the further oxyalkylation of Example 1c, preceding. As previously stated, the oxyalkylation-susceptible compound, to wit, Example 1b, present at the beginning of the stage was obviously the same as at the end of the prior stage (Example 10), to wit, 15.18 pounds. The amount of oxide present in the initial step was 15.18 pounds, the amount of catalyst remained the same, to wit, 1.0 pound, and the amount of solvent remained the same. The amount of oxide added was another 15.18 pounds, all addition of oxide in these various stages being based on the addition of this particular amount. Thus, at the end of the oxyethylation step the amount of oxide added was a total of 30.36 pounds and the molal ratio of ethylene oxide to resin condensate was 69.0 to 1.0. The theoretical molecular weight was 3348.
The maximum temperature during the operation was C. to C. The maximum pressure was in the range of 20 to 25 pounds. The time period was one and one-half hours.
Example 3c The oxyalkylation proceeded in the same manner described in Examples 10 and 20. There was no added solvent and no added catalyst. The oxide added was 15.18 pounds and the total oxide at the end of the oxycthylation step was 45.54 pounds. The molal ratio of oxide to condensate was 103.5 to 1. Conditions as far as temperature and pressure and time were concerned were all the same as in Example 1c and 2c. The time period was somewhat longer than in previous examples, to wit, 3 hours.
Example 40 The oxyethylation continued with the introduction of The molal ratio of oxide to condensate was Example 6::
The procedure was followed as in the previous examples. The amount of oxide added was another 15.18 pounds, bringing the total oxide introduced to 91.08 pounds. The temperature and pressure during this period were the same as before. The time period was 3 /2 hours. resin condensate was 207.0 to one.
Molal ratio of oxide to Example 7c The same procedure was followed in the previous six examples without the addition of more caustic or more solvent. The total amount of oxide introduced at the end of the period was 106.26 pounds. The theoretical molecular weight at the end of the oxyalkylation period was 12,144. The time required for the oxyethylation was a bit longer than in the previous step, to wit, 4 hours.
Example 80 This was the final oxyethylation in this particular series. There was no added solvent and no added catalyst. The total amount of oxide added at the end of this step was 121.44 pounds. The theoretical molecular weight was 13,662. The molal ratio of oxide to resin condensate was 276.0 to one. Conditions as far as temperature and pressure were concerned were the same as in the previous examples and the time required for oxyethylation was 4 hours.
The same procedure as described in the previous examples was employed in connection with a number of the other condensates described previously. All these data have been presented in tabular form in a series of four tables, Tables III, IV, V and VI.
In substantially every case a 25-gallon autoclave was employed, although in some instances the initial oxyethylation was started in a 1.5-gallon autoclave and then transferred to a 25-gallon autoclave. This is immaterial but happened to be a matter of convenience only. The solvent used in all cases was xylene. The catalyst used was finely powdered caustic soda.
Referring ,now to Tables III and IV,it will be noted that compounds 1a through 40c were obtained by the use of ethylene oxide, whereas 41c through 800 were obtained by the use of propylene oxide alone.
Thus, in reference to Table III it is to be noted as follows:
The example number of each compound is indicated in the first column.
The identity of the oxyalkylationasusceptible compound, to wit, the resin condensate, is indicated in the second column.
The amount of condensate is shown in the third column.
Assuming that ethylene oxide alone is employed, as happens to be the case in Examples lc through 40c, the amount of oxide present in the oxyalkylation deriva tive is shown in column 4, although in the initial step since no oxide is present there is a blank.
When ethylene oxide is used exclusively the 5th column is a blank.
The 6th column shows the amount of powdered caustic soda used as a catalysh'and :the 7th column shows the amount of solvent employed.
There was no added solvent.
The 15th column shows the theoretical molecular weight at the end of the oxyalkylation period.
The 8th column states the amount of condensate present in the reaction mass at the end of the period.
As pointed out previously, in this particular series the amount of reaction mass withdrawn for examination was so small that it was ignored and for this reason the resin condensate in column 8 coincides with the figure in column 3.
Column 9 shows the amount of ethylene oxide employed in the reaction mass at the end of the particular period.
Column 10 can be ignored insofar that no propylene oxide was employed.
Column 11 shows the catalyst at the end of the reaction period.
Column 12 shows the amount of solvent at the end of the reaction period.
Column 13 shows the molal ratio of ethylene oxide to condensate.
Column 14 can be ignored for the reason that no propylene oxide was employed.
Referring now to Table VI. It is to be noted that the first column refers to Examples 1c, 2c, 3c, etc.
The second column gives the maximum temperature employed during the oxyalkylation step and the third column gives the maximum pressure.
The fourth column gives the time period employed.
The last three columns show solubility tests by shaking a small amount of the compound, including the solvent present, with several volumes of water, xylene and kerosene. It sometimes happens that although xylene in comparatively small amounts will dissolve in the concentrated material when the concentrated material in turn is diluted with xylene separation takes place.
Referring to Table IV, Examples 41c through c are the counterparts of Examples 10 through 40c, except that the oxide employed is propylene oxide instead of ethylene oxide. Therefore, as explained previously, two columns are blank, to wit, columns 4 and 9.
Reference is now made to Table V. It is to be noted these compounds are designated by d number, 1d, 2d, 3d, etc., through and including 32d. They are derived, in turn, from compounds in the c series, for example, 36c, 40c, 54c, and 76c. These compounds involve the use of both ethylene oxide and propylene oxide. Since compounds 1c through 40c were obtained by the use of ethylene oxide, it is obvious that those obtained from 36c and 400, involve the use of ethylene oxide first, and propylene oxide afterward. Inversely, those compounds obtained from 54c and 760 obviously come from a prior series in which propylene oxide was used first.
In the preparation of this series indicated by the small letter d, as 1d, 2d, 3d, etc., the initial c series such as 36c, 40c, 54c, and 76c, were duplicated and the oxyalkylation stopped at the point designated instead of being carried further as may have been the case in the original oxyalkylation step. Then oxyalkylation proceeded by using the second oxide as indicated by the previous explanation, to wit, propylene oxide in 1d through 16a, and ethylene oxide in 17d through 32d, inclusive.
In examining the table beginning with 1d, it will be noted that the initial product, i. e., 36c, consisted of the reaction product involving 15.18 pounds of the resin condensate, 22.27 pounds of ethylene oxide, 1.0 pound of caustic soda, and 6.0 pounds of thesolvent.
It is to be noted that reference to the catalyst in Table. V refers to the total amount of catalyst, i. e., the catalyst present from the first oxyalkylationstep plus added catalyst, if any. The same is true in regard to the solvent. Reference to the solvent refers to the total solvent present, i. e. that from the first oxyalkylation step Plus added solvent, if any.
2,864,800 25 26 In this series, it will be noted that the theoretical oxide is used along with either one of the two oxides molecular weights are given prior to the oxyalkylation. just mentioned, or a combination of both of them. step and after the oxyalkylation step, although the value The colors of the products usually vary from a reddish at the end of one step is the value at the beginning of amber tint to a definitely red, and amber. The reason is the next step, except obviously at the very start the value primarily that no eifort is made to obtain colorless resins depends on the theoretical molecular weight at the end initially and the resins themselves may be yellow, amber, of the initial oxyalkylatio-n step; i. e., oxyethylation for or even dark amber. Condensation of a nitrogenous 1d through 16d and oxypropylation for 17d through 32d. product invariably yields a darker product than the origi- It will be noted also that under the molal ratio the nal resin and usually has a reddish color. The solvent values of both oxides to the resin condensate are included. employed, if xylene, adds nothing to the color but one may use a darker colored aromatic Oxyalkylation generally tends to products and the more oxide em e s mmhmm i rt-l n n o h o l w i O 0 e h t S .C t. S a h n. 1 a mefidd i t ee 6. mm u m amwa m m dmh 0 p .H .w w .m vrm pn r The data given in regard to the operating conditions is substantially the same as before and appears in Table VIII.
The products resulting from these procedures may concolor of the product. Products ca tain modest amounts, or have small amounts, of the the final color is a lighter amb solvents as indicated by the figures in the tables. If Such products can be decolorized by the use of clays, desired the solvent may be removed by distillation, and bleaching chars, etc. As far as use particularly vacuum distillation. Such distillation also concerned, or some other industrial uses, there is no may remove traces or small amounts of uncombined justification for the cost of bleaching the product. oxide, if present and volatile under the conditions em- 20 ployed.
Moles. wt. based on thevalue oxide alkyl.
crnpd.
Molal ratio oxide to oxyto oxyoretical alkyl. suscept. susce cmpd.
Ethyl. Propl.
Solvent, lbs.
Catalbs.
5555333355555 355000000000000555500003333 LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL Composition at end oxide, lyst,
Ethl. Propl. oxide,
Generally speaking, the amount of alkaline catalyst 1w hwml1m44444444M7- 7M- 77555555551 111mmmm .m5 5 5 5 i.nm :wRTfiiKm-hZlZl-LIZLLLLLLLluizm wemflm-mxmem 1]1111111111111111111 111 11.111111111111 present is comparatively small and it need not be removed. Since the products per se are alkaline due to the presence of a basic nitrogen, the removal of the alkaline catalyst is somewhat more difficult than ordinarily is the case for I the reason that if one adds hydrochloric acid, for example, to neutralize the alkalinity one may partially neutralize the basic nitrogen radical also. The preferred procedure is to ignore the presence of the alkali unless of concentrated hydrochloric acid equal to the caustic soda present.
Table III Solvent,
Obviously, in the use of ethylene oxide and propylene oxide in combination one need not first use one oxide and then the other, but one can mix the two oxides and thus obtain what may be termed an indiiferent oxyalkylation, i. e., no attempt to selectively add one and then the other, or any other variant.
Needless to say, one could start with ethylene oxide and then use propylene oxide, and then go back to ethylene i or, inversely, start i h propylene id it is ob ectionable or else add a stolchiometric amount then use ethylene oxide, and then go back to propylene oxide; or, one could use a combination in which butylene '0xyalkylatlon-susceptlble.
Table V] Max. Max. Solubility H Ex. temp., pres., TLme,
p. s. i. hrs.
Water H Xylene Kerosene 20-25 1 Insoluble.
10-15 10-15 Emulsifiable'.
Sol
Insoluble.
D0. Dlsperslble.
Solu
o. Dlsperslble. Soluble.
Do. Insoluble.
o. Insoluble.
Do. Dlspersible. Solu 0. Dlsperslble. Soluble.
Do. I Insoluble.
0. 30-35 1% Dlsperslble.
Soluble.
Insoluble.
Table VI --Contmued Max. Max. Solubility Ex. temp, pres., Time, No. C. p. s. i hrs.
Water Xylene Kerosene 30-35 3% Insoluble. -20 Do. 15-20 1 D0. 15-20 2 D0. 15-20 3 Do. 15-20 1% D0. 15-20 1% D0. 15-20 1 Do. 15-20 2% Do.
PART 6 tails have been included in regard to both steps. Con- The resin condensates which are employed as intermediate reactants are strongly basic. Initial oxyalkylation of these products with a monoepoxide or diepoxide can be accomplished generally, at least in the initial stage, without the addition of the usual alkaline catalyst such as those described in connection with oxyalkylation employing monoepoxides in Part 5 immediately preceding. As a matter of fact, the procedure is substantially the same as using a non-volatile monoepoxide such as glycide or methylglycide. However, during progressive oxyalkylation with a monoepoxide it is usually necessary to use a catalyst as previously described and, thus, there may or may not be sufficient catalyst present for the reaction with the diepoxide. Reference to the catalyst present includes the residual catalyst remaining from the oxyalkylation step in which the monoepoxide was used.
Briefly stated then, employing polyepoxides in combination with a nonbasic reactant the usual catalysts include alkaline materials, such as caustic soda, caustic potash, sodium methylate, etc. acidic in nature and are of the kind illustrated by iron and tin chloride. Furthermore, insoluble catalysts such as clay or specially prepared mineral catalysts havebeen used. If for any reason the reaction does not proceed rapidly enough with the diglycidyl ether or other analogous reactant then a small amount of finely divided caustic soda or sodium methylate can be employed as a catalyst. The amount generally employed would be 1% or 2%.
It goes without saying that the reaction can take place in an inert solvent, i. e., one that is not oxyalkylationsusceptible. Generally speaking, this is most conveniently an aromatic solvent such as xylene or a higher boiling coal tar solvent, or else a similar high boiling aromatic solvent obtained from petroleum. One can employ an oxygenated solvent such as the diethylether of ethyleneglycol, or the diethylether of propyleneglycol, or similar ethers, either alone or in combination with a hydrocarbon solvent. The selection of the solventdepends in part on the subsequent use of the derivatives or reaction products. If the reaction products are to be rendered solvent-free and it is necessary that the solvent be readily removed as, for example, by the use of vacuum distillation, then xylene or an aromatic petroleum solvent will serve. If the product is going to be subjected to Other catalysts may 'be I densate 1b, in turn, was obtained from amine 3 and resin 2a. As previously pointed out amine 3 is 2-oleylimidazoline. (See Part 5.) Resin 2a was obtained from para-tertiarybutylphenol and formaldehyde.
In any event, 455 grams of the oxyalkylated resin 7 condensate previously identified as 20 were dissolved in approximately an equal weight of xylene. About 4.2 grams of sodium methylate were added as a catalyst so the total amount of catalyst present, including residual catalyst from the prior oxyalkylation, was about 4.7 grams. 18.5 grams of diepoxide A were mixed with an equal weight of xylene. The initial addition of the diepoxide solution was made after raising the temperature of the reaction mass to about 109 C. The diepoxide was addedslowly over a period of 70 minutes. During this time the temperature was allowed to rise to about 130 C. The mixture was allowed to reflux at about 140 C. using a phase-separating trap. A small amount of xylene was removed by means of a phase-separating trap so the refluxing temperature rose gradually to about 175 C. The mixture was refluxed at this temperature for about 6 hours.
cous liquid.
in gluconic acid, but it was soluble in xylene and paroxyalkylation subsequently, then the solvent should 'be one which is not oxyalkylation-susceptible. It is easy enough to select a suitable solvent if required in any instance but, everything else being equal, the solvent chosen should be the most economical one.
Example 1e The product was obtained by reaction between the --stage oxypropylation. flepoxides of the kind herein described reduce the hydro- .but less soluble in water. "which applies throughout, for sake of brevity future ref- At the end of this period the xylene which had been removed by means of the phase-separating trap was returned to the mixture. A small amount .of material was withdrawn and thexylene evaporated on a hot plate in order to examine the physical properties. The material wasan amber, or light reddish amber, vis- It was insoluble in water; it was insoluble ticularly in a mixture of xylene and 20% methanol. However, if the material was dissolved in an oxygenated solvent and then shaken with 5% gluconic acid it showed a definite tendency to disperse, suspend, or form a sol, and particularly in a xylene-methanol mixed solvent as previously described, with or without the further addition of a little acetone.
Generally speaking, the solubility of these derivatives is in line with expectations by merely examining the solubility of the preceding intermediates, to wit, the oxyalkylated resin condensates prior to treatment with the diepoxide. These materials, of course, vary from extremely water-soluble products due to substantial oxyethylation, to those which conversely are water-insoluble but xylene-soluble or even kerosene-soluble due to high Reactions with diepoxides or polyphile properties and increase the hydrophobe properties, i. e., generally make the products more soluble in kerosene or a mixture of kerosene and xylene, or in xylene, Since this is a general rule erence to solubility will be omitted.
The procedure employed, of course, is simple in light of What has been said previously and in etfect is a pro- QIceduresimilar to that employed in the use of glycide or Various examples obtained insubstantially the same or gelling even when the molal ratio is in the orderbf 2 manner are enumerated in the following tables: moles of resin to one of 'diepoxide. "We have'found Table VII Ex. Oxy. Amt, Di- Amt Catalyst Xy- Molar Time of Max. No. resincongrs. epoxide grs. (N OQHQ), lene, ratio reaction, temp., Color and physical state densate used grs. grs. 'hrs. O. I q
455 A 18. 5 4.7 474 2:1 6 175 Reddlsh amber reslnousmass; 304 A 9. 3 3. 1 313 2:1 6 175 D0. 337 A 9. 3 4. 396 2:1 6 170- Do. 355 A 13. 3. 7 374 2:1 6 174 Do. 232 A 13.5 2.5 251 2:1 5.5 130 Do. 304 A 13. 5 3. 2 323 2:1 6 170 Do. 464 A 13. 5 4. 3 433 2:1 6 172 Do. 355 A 13. 5 3. 7 374 2:1 6 174 D 232 A 13. 5 2. 5 251 2:1 5 130 D0. 463 A 13. 5 4. 3 432 2:1 6 175 Do. 266 A 9.3 2.3 275. 2:1 5 175 Do. 342 A 9. 3 3. 5, 351 2:1 5 170 Do. 413 A 7 0.3 4.3 427 2:1 6 168 Do. 266 A 9. 3 2. 3 275 2:1 5 175 Do. 121 A 1. 9 1. 2 123 2:1 5 177 Do.
Table VIII Ex. Oxy. Amt, Di- Amt., Catalyst Xy- Molar Time of Max. No. resin congrs. epoxide grs. (N30011:), leue, ratio reaction, temp., Color and physical state densate use grs. .;grs. hrs. O.
455 B 11 4. 7 466 2:1 6 180 Reddish amber resinous mass 304 B 5. 5 3. 1 310 2:1 5 132 Do. 337 B 5. 5' 3. 9 393 2:1 5 135 Do. 5 355 B 11 3.7 366, 2:1 5 135 Do. 232 B 11 2. 4 243 2:1 5 134 Do. 304 B 11 3.2 315 2:1 5 132 Do. 464 I B 11 4. 3 475 2:1 6 130 o. 355 B 11 3; 7 366 2:1 6 135 Do. 232 B 11 2. 4 243 2:1 5 130 D0. 463 B 11 4. 7 474 2:1 6 173 Do. 266 B 5. 5 2. 7 272 2:1 4. 5 135 Do. 342 B 5. 5 3. 5 343 2:1 5 135 Do. 413 B 5. 5 4. 2 424 2:1 5. 5 134 Do. 266 B 5. 5 2. 7 272 2:1 4. 5 135 Do. 121 B 1. 1- 1. 2 122 2:1 4 135 D0.
Table IX can be avoided by any one of the followingprocedures or their equivalent. Dilute the resin or the diepoxide, or Prop both, with an inert solvent, such as xylene or the like. In Ex. No. Oxyalkyl. weight of Amount of Amount of s i resin cm reaction product, gm solvent ome nstances an oxygenated solvent, such as the dlethyl densate product ether of ethyleneglycol may be employed. Another pro 5 I cedure which is helpful is to reduce the amount of catalyst 9,480 4340- ,37 used, or reduce the temperature of reaction by adding a iggg 31 $22 Y i 23; small amount of initially lower boiling solvent, such as 71470 1 5 1-8 benzene, or use benzene entirely. Also, we have found 5,000 2500 it desirable at times to use slightly less than apparently 6,440 3,220 7 1,610 9,650 4,305 2,413 the theoretical amount of diepoxlde, fon nstance, 90% 7,470 31735 11863 to 95% instead of 100%. The reason for this fact may 5,000 5,000 2,500 9,630- 4,315 2,403 reside 1n the possibility that the molecular weight d1- 5 8% 5 382 i is; mensions on either the resin molecule or the diepoxide 171070 31414 11707 molecule actually may vary from the true molecular 11 000 00 1 '00 2, 466 A 233 weight by several percent. L
The condensate can be depicted ma simplified form which for convenience ma be-shown thus: 5' Table X p v (Amlne)CH (Res1n)CH (Am1ne) Prob. moi. If such product is subjected to oxyalkylation reaction in- 1' r A A t t fji zfi ggggg gg 23%,; volves the phenohc hydroxyls of the resin structure; and, de a e product thus, canbe depicted in the following manner: j
9,330 4&665 2,333 (Am111e)CH (OXyalkylated Res1n)CH (A-1mne) ig ggg gfgg gig Following such simplification the reaction with a poly- 7, 320 3, 660 1,830 epoxide, and particularly a dlepoxide, would be dep cted 4, 350 4, 350 2, 425 th 1 9,500 0 5 H lklt R'OHAi 7,320 3:660 1:830 (Am1ne)C (Oxya yaed 63111) 4( tone) 4, 350 4, 350 2, 425 9, 430 4, 740 2, 370 D. G. E. 10,350 2, 170 1, 035 13,330 2,776 1,333 fig, g (Amine) OH2(Oxya1kylated Resin)OHz(Amine) 3v 0 2:451 1:226 in which D. G. E. represents a diglycidyl ether as :speci fied. At times we have found atendency for-an insoluble As has been pointed out previously, the condensation mass to form or at least to obtain incipient cross-linking [5 reaction may produce other products, including, fori'e'xample aproduct which may be'indicated ofwhat has been said previously:
[(Amine)CH (Resin)l This product, since it is susceptible to oxyalkylation by means of the oxyalkylated phenolic hydroxyl groups and depending on the selection of the amine, may-be susceptible to oxyalkylation in event a hydroxylated amine or polyamine had been used, and may be indicated in the following manner: a j 1 [oxyalkylated (Amine) CH (Resin)] When a diglycidyl ether is employed one would obviously obtain compounds in which two molecules of the kind described immediately preceding are united in -,a manner comparable to that previously described, which may be indicated thus: v
Oxyalkylated (Amine) OHKResin) L l thus in light xyalkylated(Amine)GHz(Resiu) Likewise, it is obvious that the two different types of oxyalkylation-susceptible compounds may combine so as to give molecules which may be indicated thus:
(Amine) CHz(0xyalkylnted Resin) CH1 (Amine)I r-- I Oxyalkylated(Amine) CHKResin) ox alkyiatedmmimcmmmme) i r i (Amine)CHz(0xyalkylated Resin)CHz(Amine) oxyalkylated (Amine) C H: (Amine) l Oxyalkylated(Amine) CHz( Resin) Oxyalkylated(Amine)CHKAmine) PART 7 As to the use of conventional demulsifying agents reference is made to U. S. Patent No. 2,626,929, dated January 7, 1953, to De Groote, and particularly to Part 3. Everything that appears therein applies with equal force and efiect to the instant process, noting only that where reference is made tot Example 13b in said text beginning in column 15 and ending in column 18, reference should be to Example 4e, herein described.
PART 8 The products, compounds, or the like, herein described can be employed for various purposes and particularly wherein R and R" are alkyl groups.
It is not necessary to point out that, after reaction with a reactant of the kind described which introduces a basic nitrogen atom, the resultant product can be employed for the resolution of emulsions of the waterin-oil type as described in Part 7, preceding, and also for other purposes described hereinafter.
Referring now to the use of the products obtained by reaction with a polyepoxide and certain specified oxyalkylated products obtained in the manner described in Part 6, preceding, it is to be noted that in addition to their use in the resolution of petroleum emulsions they may be used as emulsifying agents for oils, fats, and waxes, as ingredients in insecticidecompositions, or as detergents and wetting agents in the laundering, scouring, drying, tanning and mordanting industries. They may also be used for preparing boring or metal-cutting oils and cattle dips, as metal pickling inhibitors, and for pharmaceutical purposes.
Not only do these oxyalkylated derivatives have utility as such but they can serve as initial materials for more complicated reactions of the kind ordinarily requiring a hydroxyl radical. This includes esterification, etherization, etc.
The oxyalkylated derivatives may be used as valuable additives to lubricating oils, both those derived from petroleum and synthetic lubricating oils. Also, they can be used as additives to hydraulic brake fluids of the aqueous and non-aqueous types. They may be used in connection with other processes where they are injected into an oil or gas well for purpose of removing a mud sheath, increasing the ultimate flow of fluid from the surrounding strata, and particularly in secondary recovery operations using aqueous flood waters. These derivatives also are suitable for usein dry cleaners soaps.
More specifically, such products, depending on the nature of the initial resin, the particular monoepoxide selected and the ratio of monoepoxide' to resin, together with the particular polyepoxide employed, result in a variety of materials which are useful as wetting agents or surface tension reducing agents; as detergents, emulsifiers or dispersing agents; as additives for lubricants, both of the natural petroleum type and the synthetic type, as additives in the flotation of ores, and at times as aids in chemical reactions insofar that demulsification is produced between the insoluble reactants. Furthermore, such products can be used for a variety of other purposes, including use as corrosion inhibitors, defoamers, asphalt additives, and at times even in the resolution of oil-in-water emulsions. They serve at times as mutual solvents promoting a homogeneous system from two otherwise insoluble phases.
The products herein described can be reacted with polycarboxy acids, such as phthalic acid or anhydride, maleic acid or anhydride, diglycolic acid, and various tricarboxy and tetracarboxy acids so as to yield acylated derivatives, particularly if one employs one mole of the polycarboxy acid for each reactive hydroxyl radical 37 present in the final polyepoxide-treated product. Thus, one obtains a comparatively large molecule in which there is a plurality of carboxyl radicals. Such acidic fractional esters are suitable for the resolution of petroleum emulsions of the water-in-oil type as herein described.
Having thus described our invention what we claim as new and desire to secure by Letters Patent is:
l. A three-step manufacturing process involving 1) condensation; (2) oxyalkylation with a monoepoxide; and (3) oxyalkylation with a polyepoxide; said first manufacturing step being a method of (A) condensing (a) a fusible, nonoxygenated organic solventsoluble, water-insoluble, phenol-aldehyde resin having an average molecular Weight corresponding to at least 3 and not over 6 phenolic nuclei per resin molecule; said resin being difunctional only in regard to methylol-forming reactivity; said resin being derived by reaction between a difunctional monohydric phenol and an aldehyde having not over 8 carbon atoms and reactive toward said phenol; said resin being formed in the substantial absence of trifunctional phenols; said phenol being of the formula in which R is a saturated aliphatic hydrocarbon radical having at least 4 and not more than 24 carbon atoms and substituted in the 2,4,6 position; (b) cyclic amidines selected from the class consisting of substituted imidazolines and substituted tetrahydropyrimidines wherein the substituent is an organic radical composed of elements selected from the group consisting of carbon, hydrogen, oxygen and nitrogen and in which there is present at least one basic secondary amino radical and characterized by freedom from any primary amino radical; and formaldehyde; said condensation reaction being conducted at a temperature sufficiently high to eliminate water and below the pyrolytic point of the reactants and resultants of reaction; and with the proviso that the resinous condensation product resulting from the process be heat stable; followed as a second step by (B) oxyalkylation by means of an alpha-beta alkylene oxide having not more than 4 carbon atoms and selected from the class consisting of ethylene oxide, propylene oxide, butylene oxide, glycide and methylglycide; and then completing the reaction by a third step of (C) reacting said oxyalkylated resin condensate with nonaryl hydrophile polyepoxides containing at least two 1,2-epoxy rings and having two terminal 1,2- epoxy rings obtained by replacement of an oxygen-linked hydrogen atom in a Water-soluble polyhydric alcohol by the radical.
said polyepoxides being free from reactive functional groups other than 1,2-epoxy and hydroxyl groups and characterized by the fact that the divalent linkage uniting the terminal oxirane rings is free from any radical having more than 4 uninterrupted carbon atoms in a single chain; with the further proviso that said reactive monoepoxidederived compounds (AA) and nonarylpolyepoxides (BB) be members of the class consisting of non-thermosetting organic solvent soluble liquids and solids melting below the point of pyrolysis; with the added proviso that the reaction product be a member of the class of solvent-soluble liquids and solids melting below the point of pyrolysis; said reaction between (AA) and (BB) be conducted below the pyrolytic point of the reactants and the resultants of reaction; and with the final proviso that the ratio of 38 reactants be 2 moles of the oxyalkylated resinzc'ondensate' to 1 mole of the nonaryl polyepoxide 2. The product obtained by the method described in claim 1.
3. A three-step manufacturing process involving 1) condensation; (2) oxyalkylation with a monoepoxide; and (3) oxyalkylation with a polyepoxide; said first manufacturing step being a method of (A) condensing (w) a fusible, non-oxygenated organic solvent-soluble, waterinsoluble, phenol-aldehyde resin having an average molecular weight corresponding to at least 3 and not over 6 phenolic nuclei per resin molecule; said resin being difunctional only in regard to methylol-forming reactivity; said resin being derived by reaction between a difunctional monohydric phenol and an aldehyde having not over 8 carbon atoms and reactive toward said phenol; said resin being formed in the substantial absence of trifunctional phenols; said phenol being of the formula in which R is a saturated aliphatic hydrocarbon radical having at least 4 and not more than 24 carbon atoms and substituted in the 2,4,6 position; (b) cyclic amidines selected from the class consisting of substituted imidazolines and substituted tetrahydropyrimidines wherein the substituent is an organic radical composed of elements selected from the group consisting of carbon, hydrogen, oxygen and nitrogen and in which there is present at least one basic secondary amino radical and characterized by freedom from any primary amino radical; and (c) formaldehyde; said condensation reaction being conducted at a temperature sufficiently high to eliminate water and below the pyrolytic point of the reactants and resultants of reaction; and with the proviso that the resinous condensation product resulting from the process be heatstable; followed as a second step by (B) oxyalkylation by means of an alpha-beta alkylene oxide having not more than 4 carbon atoms and selected from the class consisting of ethylene oxide, propylene oxide, butylene oxide, glycide and methylglycide; and then completing the reaction by a third step of (C) reacting said oxyalkylated resin condensate with nonaryl hydrophile polyepoxides containing at least two 1,2-epoxy rings and having two terminal 1,2-epoxy rings obtained by replacement of an oxygen-linked hydrogen atom in a water-soluble polyhydric alcohol by the radical.
said polyepoxides being free from reactive functional groups other than 1,2-epoxy and hydroxyl groups and characterized by the fact that the divalent linkage uniting the terminal oxirane rings is free from any radical having more than 4 uninterrupted carbon atoms in a single chain; said polyepoxides being characterized by having present not more than 20 carbon atoms; with the further proviso that said reactive monoepoxide-derived compounds (AA) and nonaryl polyepoxides (BB) be members of the class consisting of non-thermosetting organic solvent-soluble liquids and solids melting below the point of pyrolysis; with the added proviso that the reaction product be a member of the class of solvent-soluble liquids and solids melting below the point of pyrolysis; said reaction between (AA) and (BB) be conducted below the pyrolytic point of the reactants and the resultants of reaction; and with the final proviso that the ratio of reactants be 2 moles of the oxyalkylated resin condensate to 1 mole of the nonaryl polyepoxide.
4. A three-step manufacturing process involving 1) condensation; (2) oxyalkylation with a monoepoxide; and
(3) oxyalkylation with a diepoxide; said first manufacturing step being a method of (A) condensing (a) a fusible, non-oxygenated organic solvent-soluble, waterinsoluble, phenol-aldehyde resin having an average molecular weight corresponding to at least 3 and not over 6 phenolic nuclei per resin molecule; said resin being difunctional only in regard to rnethylolforming reactivity; said resin being derived by reaction between a difunctional monohydric phenol and an aldehyde having not over 8 carbon atoms and reactive toward said phenol; said resin being formed in the substantial absence of trifunctional phenols; said phenol being of the formula in which R is a saturated aliphatic hydrocarbon radical having at least 4 and not more than 24 carbon atoms and substituted in the 2,4,6 position; (b) cyclic amidines selected from the class consisting of substituted imidazolines and substituted tetrahydropyrimidines wherein the substitnent is an organic radical composed of elements selected from the group consisting of carbon, hydrogen, oxygen and nitrogen and in which there is present at least one basic secondary amino radical and characterized by freedom from any primary amino radical; and (c) formaldehyde; said condensation reaction being conducted at a temperature sufficiently high to eliminate water and below the pyrolytic point of the reactants and resultants of reaction; and with the proviso that the resinous condensation product resulting from the process be heat-stable; followed as a second step by (B) oxyalkylation by means of an alpha-beta alkylene oxide having not more than 4 carbon atoms and selected from the class consisting of ethylene oxide, propylene oxide, butylene oxide, glycide and methylglycide; and then completing the reaction by a third step of (C) reacting said oxyalkylated resin condensate with nonaryl hydrophile diepoxides containing two terminal 1,2-epoxy rings obtained by replacement of an oxygenlinked hydrogen atom in a water-soluble polyhydric alcohol by the radical said diepoxide being free from reactive functional groups other than 1,2-epoxy and hydroxyl groups and characterized by the fact that the divalent linkage uniting the terminal oxirane rings is free from any radical having more than 4 uninterrupted carbon atoms in a single chain; said diepoxides being characterized by having present not more than 20 carbon atoms; with the further proviso that said reactive monoepoxide-derived compounds (AA) and nonaryl diepoxides (BB) be members of the class consisting of non-thermosetting organic solventsoluble liquids and solids melting below the point of pyrolysis; with the added proviso that the reaction product be a member of the class of solvent-soluble liquids and solids melting below the point of pyrolysis; said reaction between (AA) and (BB) be conducted below the pyrolytic point of the reactants and the resultants of reaction; and with the final proviso that the ratio of reactants be 2 moles of the oxyalkylated resin condensate to 1 mole of the nonaryl diepoxide.
5. The process of claim 4 wherein the diepoxide contains at least one reactive hydroxyl radical.
6. A three-step manufacturing process involving (1) 40 condensation; (2) oxyalkylation with a monoepoxide; and (3) oxyalkylation with a diepoxide; said first manufacturing step being a method of (A) condensing (a) a fusible, non-oxygenated "organic solvent-soluble, waterinsoluble, phenol-aldehyde resin having an average molecular weight corresponding to at least 3 and not over 6 phenolic nuclei per resin molecule; said resin being difunctional only in regard to methylol-forming reactivity; said resin being derived by reaction between a difunctional monohydric phenol and an aldehyde having not over 8 carbon atoms and reactive toward said phenol; said resin being formed in the substantial absence of trifunctional phenols; said phenol being of the formula in which R is a saturated aliphatic hydrocarbon radical having at least 4 and not more than 24 carbon atoms and substituted in the 2,4,6 position; (b) cyclic amidines selected from the class consisting of substituted imidazolines and substituted tetrahydropyrimidines wherein the substituent is an organic radical composed of elements selected from the group consisting of carbon, hydrogen, oxygen and nitrogen and in which there is present at least one basic secondary amino radical and characterized by freedom from any primary amino radical; and (c) formaldehyde; said condensation reaction being conducted at a temperature sufficiently high to eliminate water and below the pyrolytic point of the reactants and resultants of reaction; and with the proviso that the resinous condensation product resulting from the process be heatstable; followed as a second step by (B) oxyalkylation by means of an alpha-beta alkyleneoxide having not more than 4 carbon atoms and selected from the class consisting of ethylene oxide, propylene oxide, butylene oxide, glycide and methylglycide; and then completing the reaction by a third step of (C) reacting said oxyalkylated resin condensate with a hydroxylated diepoxypolyglycerol containing two terminal 1,2-epoxy rings and having not more than 20 carbon atoms; with the further proviso that said monoepoxide-derived compounds (AA) and said hydroxylated diepoxyglycerol (BB) be members of the class consisting of non-thermosetting organic solvent-soluble liquids and solids melting below the point of pyrolysis; with the added proviso that the reaction product be a member of the class of solvent-soluble liquids and solids melting below the point of pyrolysis; said reaction between (AA) and (BB) be conducted below the pyrolytic point of the reactants and the resultants of reaction; and with the final proviso that the ratio of reactants be 2 moles of the oxyalkylated resin condensate to 1 mole of the hydroxylated diepoxyglycerol.
7. The method of claim 6 wherein the polyglycerol derivative has not over 5 glycerol nuclei, and the precursory phenol is para-substituted and contains at least 4 and not over 14 carbon atoms in the substituent group, and the precursory aldehyde is formaldehyde, and the total number of phenolic nuclei in the initial resin are not over 5.
References Cited in the file of this patent UNITED STATES PATENTS