US3219666A - Derivatives of succinic acids and nitrogen compounds - Google Patents

Derivatives of succinic acids and nitrogen compounds Download PDF

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US3219666A
US3219666A US12680961A US3219666A US 3219666 A US3219666 A US 3219666A US 12680961 A US12680961 A US 12680961A US 3219666 A US3219666 A US 3219666A
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grams
mixture
nitrogen
oil
heated
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Priority to DENDAT1248643D priority Critical patent/DE1248643B/en
Priority to US80266759 priority patent/US3172892A/en
Priority to GB43717/59A priority patent/GB922831A/en
Priority to DE19601794292D priority patent/DE1794292B1/en
Application filed filed Critical
Priority to US12680961 priority patent/US3219666A/en
Priority to US348760A priority patent/US3278550A/en
Priority to NL6502540A priority patent/NL6502540A/xx
Priority to FR7499A priority patent/FR1432851A/en
Priority to DE1965L0050105 priority patent/DE1570871A1/en
Priority to US468948A priority patent/US3341542A/en
Publication of US3219666A publication Critical patent/US3219666A/en
Application granted granted Critical
Priority to US608219A priority patent/US3366569A/en
Priority to US610769A priority patent/US3444170A/en
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    • C07ORGANIC CHEMISTRY
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    • C07D207/00Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/30Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members
    • C07D207/34Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D207/36Oxygen or sulfur atoms
    • C07D207/402,5-Pyrrolidine-diones
    • C07D207/4042,5-Pyrrolidine-diones with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms, e.g. succinimide
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Definitions

  • This invention relates to oil-soluble nitrogen-containing compositions and to the process of preparing the same.
  • the compositions of this invention are useful as dispersing agents in lubricants, especially lubricants intended for use in the crankcase of internal combustion engines, gears, and power transmitting units.
  • compositions which are adapted for use as additives in hydrocarbon oils.
  • compositions which are effective as detergents in lubricating compositions are also an object of this invention to provide compositions which are effective as detergents in lubricating compositions.
  • a detergent composition comprising an oil-soluble, acylated nitrogen composition characterized by the presence within its structure of (A) a substantially hydrocarbon-substituted polar group selected from the class consisting of acyl, acylirnidoyl, and acyloxy radicals wherein the substantially hydrocarbon substituent contains at least about 50 aliphatic carbon atoms and (B) a nitrogen-containing group characterized by a nitrogen atom attached directly to said relatively polar group.
  • a critical aspect of this invention is the size of the substantially hydrocarbon substituent in the acylated nitrogen compounds.
  • acylated nitrogen compositions having at least about 50 aliphatic carbon atoms in the substantially hydrocarbon substituent are contemplated as being within the scope of this invention.
  • the substantially hydrocarbon substituent must then contain at least about 25 aliphatic carbon atoms per each polar group. This lower limit is based not only upon the consideration of the oil-solubility of the acylated nitrogen compositions but also upon the effectiveness of such compounds as additives in hydrocarbon oils for the purposes of this invention.
  • acylated nitrogen compositions having less than the minimum number of such aliphatic carbon atoms may be sufficiently oil-soluble, they nevertheless are not sufiiciently effective to be useful as additives of this invention. Furthermore, it has been discovered that their effectiveness diminishes sharply with a corresponding decrease in the size of the substantially hydrocarbon substituent so that acylated nitrogen compositions having less than about 35 aliphatic carbon atoms in such substituent either are ineffective or produce detrimental results when added to a hydrocarbon oil.
  • the radical preferably should be substantially saturated, i.e., at least about of the total number of carbon-to-carbon covalent linkages are saturated linkages.
  • An excessive proportion of unsaturated linkages renders the molecule susceptible to oxidation, degradation, and polymerization and results in products unsuitable for use in hydrocarbon oils in many applications.
  • the substantially hydrocarbon substituent of the acylated nitrogen compositions of this invention preferably should be substantially free from large oil-solubilizing pendant groups, i.e., groups having more than about 6 aliphatic carbon atoms. While some large oil-solubilizing pendant groups may be present, they preferably should be present in proportions less than about one such group for every 25 aliphatic carbon atoms in the main hydrocarbon chain. A higher proportion of large pendant groups impairs the efiectiveness of the acylated nitrogen compositions of this invention as additives in hydrocarbon oils.
  • large oil-solubilizing pendant groups i.e., groups having more than about 6 aliphatic carbon atoms. While some large oil-solubilizing pendant groups may be present, they preferably should be present in proportions less than about one such group for every 25 aliphatic carbon atoms in the main hydrocarbon chain. A higher proportion of large pendant groups impairs the efiectiveness of the acylated nitrogen compositions of this invention as additives in
  • the substantially hydrocarbon substituent may contain polar substituents provided, however, that the polar substituents are not present in proportions sufliciently large to alter significantly the hydrocarbon character of the radical.
  • the polar substituents are exemplified by chloro, bromo, keto, ethereal, aldehydo, and nitro, etc.
  • the upper limit with respect to the proportion of such polar substituents in the radical is approximately 10% based on the weight of the hydrocarbon portion of the radical.
  • the sources of the substantially hydrocarbon substituent include principally the high molecular weight substantially saturated petroleum fractions and substantially saturated olefin polymers, particularly polymers of mono-olefins having from 2 to about 30 carbon atoms.
  • the especially useful polymers are the polymers of lmono-olefins such as ethylene, propene, l-butene, isobutene, l-hexene, l-octene, 2-methyl-l-heptene, 3-cyclohexyl-l-butene, and 2-meth'y1-5-propyl-l-hexene.
  • Polymers of medial olefins i.e., olefins in which the olefinic linkage is not at the terminal position, likewise are useful. They are illustrated by Z-butene, 3-pentene, and 4- octene.
  • interpolymers of the olefins such as those illustrated above with other interpolymerizable olefinic substances such as aromatic olefins, cyclic olefins, and polyolefins.
  • Such interpolymers include, for ex ample, those prepared by polymerizing isobutene with styrene; isobutene with butadiene; propene with isoprene; ethylene with piperylene; isobutene with chloroprene; isobutene with p-methyl styrene; l-hexene with 1,3-hexadiene; l-octene with l-hexene; l-heptene with l-pentene, S-methybl-butene with l-octene; 3-3-dimethyl-1-pentene with l-hexene; isobutene with styrene and piperylene;
  • the relative proportions of the mono-olefins to the other monomers in the interpolymers influence the stability and oil-solubility of the final acylated nitrogen compositions derived from such interpolymers.
  • the interpolymers contemplated for use in this invention should be substantially aliphatic and substantially saturated, i.e., they should contain at least about 80% preferably at least about 95%,
  • the percentage of olefinic linkages should be less than about 2% of the total number of carbon-to-carbon covalent linkages.
  • interpolymers include copolymer of 95% (by weight) of isobutene with 5% of styrene; terpolymer of 98% of isobutene with 1% of piperylene and 1% of chloroprene; ter-polymer of 95% of isobutene with 2% of l-butene and 3% of l-hexene; terpolymer of 60% of isobutene with 20% of l-pentene and 20% of l-octene; copolymer of 80% of l-hexene and 20% of l-heptene; terpolymer of 90% of isobutene with 2% of cyclohexene and 8% of propene; and copolymer of 80% of ethylene and 20% of propene.
  • Another source of the substantially hydrocarbon radical comprises saturated aliphatic hydrocarbons such as highly refined high molecular weight white oils or synthetic alkanes such as are obtained by hydrogenation of high molecular weight olefin polymers illustrated above or high molecular weight olefinic substances.
  • olefin polymers having molecular weight of about 750-5000 are preferred.
  • Higher molecular weight olefin polymers having molecular weights from about 10,000 to about 100,000 or higher have been found to impart also viscosity index improving properties to the acylated nitrogen compositions of this invention. In many instances the use of such higher molecular weight olefin polymers is desirable.
  • olefin polymers having molecular weights less than about 700 are not useful.
  • the relatively polar group of the acylated nitrogen compositions is selected from the class consisting of acyl, acylimidoyl, and acyloxy radicals. These radicals have the following structural configurations, respectively:
  • R represents the substantially hydrocarbon substituent described hereinbefore and R represents a hydrogen radical or an organic radical such as a hydrocarbon radical or a polar-substituted hydrocarbon radical.
  • the nitrogen-containing group of the acylated nitrogen compositions of this invention is derived from compounds characterized by a radical having the structural configuration
  • the two remaining valences of the nitrogen atom of the above N-H radical preferably are satisfied by hydrogen, amino, or organic radicals bonded to said nitrogen atom through direct carbon-to-nitrogen linkages.
  • the compounds from which the nitrogen-containing group may be derived include principally ammonia, aliphatic amines, aromatic amines, heterocyclic amines or carbocyclic amines.
  • the amines may be primary or secondary amines and may also be polyamines such as alkylene amines, arylene amines, cyclic polyamines, and the hydroxy-substituted derivatives of such polyamines.
  • amines of these types are methylamine, N- rnethyl-ethylamine, N-methyl-octylamine, N-cyclohexylaniline, dibutylamine, cyclohexylamine, aniline, di(pmethylphenyl)amine, dodecylamine, octadecylamine, ophenylenediamine, N,N-di-n-butyl-p-phenylene-diamine, morpholine, piperazine, tetrahydropyrazine, indole, heXahydrO-1,3,5-triazine, 1-H-l,2,4-triazole, melamine, bis-(p aminophenyl)methane, phenyl methylenimine, menthanediamine, cyclohexamine, pyrrolidine, 3-amino 5,6-diphenyl-1,2,4-triazine, quinonediimine, 1,
  • a preferred source of the nitrogen-containing group consists of polyamines, especially alkylene amines conforming for the most part to the formula wherein n is an integer preferably less than about 10, A is a substantially hydrocarbon or hydrogen radical, and the alkylene radical is preferably a lower alkylene radical having less than about 8 carbon atoms.
  • the alkylene amines include principally methylene amines, ethylene amines, butylene amines, propylene amines, pentylene amines, hexylene amines, heptylene amines, octylene amines, other polymethylene amines, and also the cyclic and the higher homologs of such amines such as pipera- Zines and amino-alkyl-substituted piperazines.
  • ethylene diamine triethylene tetramine, propylene diamine, decamethylene diamine, octamethylene diamine, di(heptamethylene) triamine, tripropylene tetramine, tetraethylene pentamine, trimethylene diamine, pentaethylene hexamine, di(trimethylene)triamine, 2-heptyl 3-(2-aminopropyl) imidazoline, 4-methyl-imidazoline, 1,3-bis-(2-aminoethyl) imidazoline, pyrimidine, 1-(2-amino propyl)piperazine, 1-4- bis(2-amin0ethyl) piperazine, and 2-methyl1-(2-aminobutyl)piperazine. Higher homologs such as are obtained by condensing two or more of the above illustrated alkylene amines likewise are useful.
  • the ethylene amines are especially useful. They are described in some detail under the heading Ethylene Amines in Encyclopedia of Chemical Technology, Kirk and Othmer, volume 5, pages 898905, Interscience Publishers, New York (1950). Such compounds are prepared most conveniently by the reaction of an alkylene chloride with ammonia. The reaction results in the production of somewhat complex mixtures of alkylene amines, including cyclic condensation products such as piperazines. These mixtures find use in the process of this invention. On the other hand, quite satisfactory products may be obtained also by the use of pure alkylenc amines.
  • alkylene amine for reasons of economy as well as effectiveness of the products derived therefrom is a mixture of ethylene amines prepared by the reaction of ethylene chloride and ammonia and having a composition which corresponds to that of tetraethylene pentamine.
  • Hydroxyalkyl-substituted alkylene amines i.e., alkylene amines having one or more hydroxyalkyl substituents on the nitrogen atoms, likewise are contemplated for use herein.
  • the hydroxyalkyl-substituted alkylene amines are preferably those in which the alkyl group is a lower alkyl group, i.e., having less than about 6 carbon atoms.
  • amines examples include N-(2-hydroxyethyl)- ethylene diamine, N,N-bis(2-hydroxyethyl)ethylene diamine, 1 (2 hydroxyethyl)piperazine, mono-hydroxypropyl-substituted diethylene triamine, l,4-bis(2-hydroxypropyl) piperazine, dihydroxypropyl-substituted tetraethylene pentamine, N (-3 hydroxypropy-l)tetramethylene diamine and 2-heptadecyl-1-(2-hy-droxyethyl) imidazoline.
  • nitrogen-containing group examples include ureas, thioureas, hydrazines, guanidines, amidines, amides, thioamides, cyanamides, etc. Specific examples illustrating such compounds are: hydrazine, phenylhydrazine,
  • octadecylhydrazine benzoylhydrazine, urea, thiourea, N-butylurea, stearylamide, oleylamide, guanidine, 1,3-diphenylguanidine, 1,2,3-tributylguanidine, benzamidine, octadec-amidine, N,N-dimethylsteararnidine, cyanamide, dicyandi'amide, guanylurea, aminoguandine, etc.
  • the nitrogen-containing group in the acylated nitrogen compositions of this invention is characterized by a nitrogen atom attached directly to the relatively polar group.
  • the linkage between a nitrogen atom and an acyl radical is representative of an amide or an imide structure
  • the linkage between a nitrogen atom and an acylimidoyl radical is representative of an amidine structure
  • the linkage between a nitrogen atom and an acyloxy radical is representative of an ammonium-carboxylic acid salt structure.
  • the acylated nitrogen compositions of this invention are characterized by amide, imide, amidine, or salt linkages and in many instances a mixture of such linkages.
  • Those containing two such linkages separated by a lower alkylene radical i.e., one having less than about 6 carbon atoms
  • succinic, glutaric, or adipic radicals are especially preferred in this invention.
  • a convenient method for preparing the acylated nitrogen compositions of this invention comprises reacting a high molecular weight acid-producing compound characterized by the presence within its structure of a high molecular weight oil-solubilizing group having at least about 50 aliphatic carbon atoms and at least one acidproducing group having the structural configuration.
  • X is selected from the class consisting of halogen, hydroxy, hydrocarbon-oxy, and acyloxy radicals, with at least about one-half an equivalent amount of a nitrogen-containing compound characterized by the presence with its structure of at least one radical having the structural configuration
  • a nitrogen-containing compound characterized by the presence with its structure of at least one radical having the structural configuration
  • the above process involves a reaction between the acid-producing group with the nitrogen-containing radical to result in the direct attachment of the nitrogen atoms to a polar radical, i.e., acyl, acylimidoyl, or acyloxy radical derived from the acid-producing group.
  • the linkage formed between the nitrogen atom and the polar radical may thus be that representative of a salt, amide, imide, or amidine radical.
  • the product of the above process contains a mixture of linkages representative of such radicals.
  • the precise relative proportions of such radicals in the product usually are not known as they depend to a large measure upon the type of the acid-producing group and the nitrogen-containing radical involved in the reaction and also upon the environment (e.g., temperature) in which the reaction is carried out.
  • the reaction involving an acid or anhydride group with an amino nitrogen-containing radical at relatively low temperatures such as below about 60 C. results predominantly in a salt linkage but at relatively high temperatures such as above about C results predominantly in an amide, imide, or
  • the acid-producing compounds contemplated for use in the above process include mono-carboxylic and poly- CarbOXylic acids, acid halides, esters, and anhydrides, and also mixtures of such compounds.
  • the nature of the oil-solubilizing group in such compounds should be the same as that which characterized the substantially hydrocarbon substituent, described previously, in the acylated nitrogen compositions of this invention.
  • the substantially saturated, aliphatic hydrocarbonsubstituted succinic acids and anhydrides are especially preferred for use as the acid-producing reactant in this process for reasons of the particular eifectiveness of the products obtained from such compounds as additives in hydrocarbon oils.
  • the succinic compounds are readily available from the reaction of maleic anhydride with a high molecular weight olefin or a chlorinated hydrocarbon such as the olefin polymer described herein-above. The reaction involves merely heating the two reactants at a temperature about l00-200 C.
  • the product from such a reaction is an alkenyl succinic anhydride.
  • the alkenyl group may be hydrogenated to an alkyl group.
  • the anhydride may be hydrolyzed by treatment with water or steam to the corresponding acid. Either the anhydride or the acid may be converted to the corresponding acid halide or ester by reaction with e.g., phosphorus halide, phenols or alcohols.
  • an activating polar substituent i.e., a substituent which is capable of activating the hydrocarbon molecule in respect to reaction with maleic acid or anhydride may be used in the above-illustrated reaction for preparing the succinic compounds.
  • polar substituents may be illustrated by sulfide, disulfide, nitro, mercaptan, bromine, ketone, and aldehyde radicals. Examples of such polarsubstituted hydrocarbons include polypropene sulfide, dipolyisobutene disulfide, nitrated mineral oil, di-polyethylene sulfide, brominated polyethylene, etc.
  • Another meth od useful for preparing the succinic acids and anhydrides involves the reaction of itaconic acid with a high molecular weight olefin or a polar-substituted hydrocarbon at a temperature usually within the range from about 100 C. to about 200 C.
  • the polycarboxylic acids and derivatives thereof having more than two carboxylic radicals per molecule which are contemplated for use in this invention are those containing at least about 50 aliphatic carbon atoms per molecule and furthermore at least about 25 aliphatic carbon atoms per each carboxylic radical.
  • Such acids may be prepared by hal-ogenating a high molecular weight hydrocarbon such as the olefin polymer described hereinabove to produce a poly-halogenated product, converting the poly-halogenated product to a poly-nitrile, and then hydrolyzing the poly-nitrile.
  • polycarboxylic acids may be prepared also by oxidation of a high molecular weight polyhydric alcohol with potassium permanganate, nitric acid, or a like oxidizing agent.
  • Another method for preparing such polycarboxylic acids involves the reaction of an olefin or a polar-substituted hydrocarbon such as a chloropolyisobutene with an unsaturated poly-carboxylic acid such as Z-pentene-1,3,5-tricarboxylic acid obtained by dehydration of citric acid.
  • the mono-carboxylic acids and derivatives thereof may be obtained by oxidizing a mono-hydric alcohol with potassium permanganate or by reacting a halogenated high molecular olefin polymer with a ketene.
  • Another convenient method for preparing the mono-carboxylic acids involves the reaction of metallic sodium with an acetoacetic ester or a malonic ester of an alkanol to form a sodium derivative of the ester and the subsequent reaction of the sodium derivative with a halogenated high molecular weight hydrocarbon such as brominated wax or brominated polyisobutene.
  • the mono-carboxylic and poly-carboxylic acid anhydrides are obtained by dehydrating the corresponding acids. Dehydration is readily accomplished by heating the acid to a temperature above about 70 C. preferably in the presence of a dehydration agent. e.g., acetic anhydride. Cyclic anhydrides are usually obtained from poly-carboxylic acids having the acid radicals separated by no more than three carbon atoms such as substituted succinic or glutaric acids, whereas linear polymeric anhydrides are obtained from poly-carboxylic acids having the acid radicals separated by four or more carbon atoms.
  • the acid halides of the mono-carboxylic and polycarboxylic acids can be prepared by the reaction of the acids or their anhydrides with a halogenation agent such as phosphorus tribromide, phosphorus pentachloride, or thionyl chloride.
  • the esters of such acids can be prepared simply by the reaction of the acids or their anhydrides with an alcohol or a phenolic compound such as methanol, ethanol, octadecanol, cyclohexanol, phenol, naphthol, octylphenol, etc.
  • the esterification is usually promoted by the use of an alkaline catalyst such as sodium hydroxide or sodium alkoxide or an acidic catalyst such as sulfuric acid.
  • the nature of the alcoholic or phenolic portion of the ester radical appears to have little influence on the utility of such ester as reactant in the process described herein-above.
  • the nitrogen-containing reactants useful in the above process are the compounds, described previously in this specification, from which the nitrogen-containing group the acylated nitrogen compositions of this invention can be derived.
  • the above process is usually carried out by heating a mixture of the acid-producing compound and the nitrogencontaining reactant to a temperature above about C., preferably within the range from about C. to about 250 C.
  • a temperature above about C. preferably within the range from about C. to about 250 C.
  • the process may be carried out at a lower temperature such as room temperature to obtain products having predominantly salt linkages or mixed salt-amide linkages.
  • Such products may be converted, if desired, by heating to above 80 C. to products having predominantly amide, imide, or amidine linkages.
  • a solvent such as benzene, toluene, naphtha, mineral oil, xylene, n-hexane, or the like is often desirable in the above process to facilitate the control of the reaction temperature.
  • the relative proportions of the acid-producing compounds and the nitrogen-containing reactants to be used in the above process are such that at least about one-half of a stoichiometrically equivalent amount of the nitrogencontaining reactant is used for each equivalent of the acid-producing compound used.
  • the equivalent weight of the nitrogencontaining reactant is based upon the number of the nitrogen-containing radicals defined by the structural configuration N-H.
  • the equivalent weight of the acid-producing compound is based upon the number of the acid-producing radicals defined by the structural configuration O in
  • ethylene diamine has two equivalents per mole; amino guanidine has four equivalents per mole; a succinic acid or ester has two equivalents per mole, etc.
  • the upper limit of the useful amount of the nitrogen-containing reactant appears to be about two moles for each equivalent of the acid-producing compound used. Such amount is required, for instance, in the formation of products having predominantly amidine linkages. Be yond this limit, the excess amount of the nitrogencontaining reactant appears not to take part in the reac tion and thus simply remains in the product apparently without any adverse effects.
  • the lower limit of about one-half equivalent of the nitrogencontaining reactant used for each equivalent of the acidproducing compound is based upon the stoichiometry for the formation of products having predominantly imide linkages. In most instances, the preferred amount of the nitrogen-containing reactant is approximately one equivalent for each equivalent of the acid-producing compound used.
  • a polyisobutenyl succinic anhydride is prepared by the reaction of a chlorinated polyisobutylene with maleic anhydride at 200 C.
  • the polyisobutenyl radical has an average molecular weight of 850 and the resulting alkenyl succinic anhydride is found to have an acid number of 113 (corresponding to an equivalent weight of 500).
  • the mixture then is heated and a watertoluene azeotrope distilled from the mixture. When no more water would distill the mixture is heated to C. at reduced pressure to remove the toluene. The residue is diluted with 350 grams of mineral oil and this solution r is found to have a nitrogen content of 1.6%.
  • Example 2 The procedure of Example 1 is repeated using 31 grams (1 equivalent) of ethylene diamine as the amine reactant. The nitrogen content of the resulting product is 1.4%.
  • Example 3 The procedure of Example 1 is repeated using 55.5 grams (1.5 equivalents) of an ethylene amine mixture having a composition corresponding to that of triethylene tetramine. The resulting product has a nitrogen content of 1.9%.
  • Example 4 The procedure of Example 1 is repeated using 55.0 grams (1.5 equivalents) of triethylene tetramine as the amine reactant. The resulting product has a nitrogen content of 2.9%.
  • EXAMPLE 5 To a mixture of 140 grams of toluene and 400 grams (0.78 equivalent) of a polyisobutenyl succinic anhydride (having an acid number of 109 and prepared from maleic anhydride and the chlorinated polyisobutylene of Example 1) there is added at room temperature 63.6 grams (1.55 equivalents) of an ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine and available from Carbide and Carbon under the trade name Polyamine H. The mix ture is heated to distill the water-toluene azeotrope and then to 150 C. at reduced pressure to remove the remaining toluene. The residual polyamide has a nitrogen content of 4.7%.
  • Example 6 The procedure of Example, 1 is repeated using 46 grams (1.5 equivalents) of ethylene diamine as the amine reactant. The product which resulted has a nitrogen content of 1.5%.
  • a polyisobutenyl succinic anhydride having an acid number of 105 and an equivalent weight of 540 is prepared by the reaction of a chlorinated polyisobutylene (having an average molecular weight of 1,050 and a chlorine content of 4.3%) and maleic anhydride.
  • a chlorinated polyisobutylene having an average molecular weight of 1,050 and a chlorine content of 4.3%)
  • maleic anhydride To a mixture of 300 parts by weight of the polyisobutenyl succinic anhydride and 160 parts by weight of mineral oil there is added at 6595 C. an equivalent amount (25 parts by weight) of Polyamine H (identified in Example 5). This mixture then is heated to 150 C. to distill all of the water formed in the reaction. Nitrogen is bubbled through the mixture at this temperature to insure removal of the last traces of water. The residue is diluted by 79 parts by weight of mineral oil and this oil solution found to have a nitrogen content of 1.6%.
  • EXAMPLE 8 A mixture of 2,112 grams (3.9 equivalents) of the polyisobutenyl succinic anhydride of Example 7, 136 grams (3.9 equivalents) of diethylene triamine, and 1060 grams of mineral oil is heated at 140-150 C. for one hour. Nitrogen is bubbled through the mixture at this temperature for four more hours to aid in the removal of water. The residue is diluted with 420 grams of mineral oil and this oil solution is found to have a nitrogen content of 1.3%.
  • EXAMPLE 9 To a solution of 1,000 grams (1.87 equivalents) of the polyisobutenyl succinic anhydride of Example 7, in 500 grams of mineral oil there is added at 8595 C. 70 grams (1.87 equivalents) of tetraethylene pentamine. The mixture then is heated at 150165 C. for four hours, blowing with nitrogen to aid in the removal of water. The residue is diluted with 200 grams of mineral oil and the oil solution found to have a nitrogen content of 1.4%.
  • a polypropenyl succinic anhydride is prepared by the reaction of a chlorinated polypropylene (having a molecular weight of about 900 and a chlorine content of 4%) and maleic anhydride at 200 C. The product has an acid number of 75.
  • a chlorinated polypropylene having a molecular weight of about 900 and a chlorine content of 4%)
  • maleic anhydride at 200 C.
  • the product has an acid number of 75.
  • the reaction mixture is heated at reflux temperature for three hours and water removed from an azeotrope with toluene.
  • the toluene then is removed by heating to 150 C./ 20 millimeters.
  • the residue was found to contain 1.3% of nitrogen.
  • a substituted succinic anhydride is prepared by reacting maleic anhydride with a chlorinated copolymer of isobutylene and styrene.
  • the copolymer consists of 94 parts by weight of isobutylene units and 6 parts by weight of styrene units, has an average molecular weight of 1,200, and is chlorinated to a chlorine content of 2.8% by weight.
  • the resulting substituted succinic anhydride has an acid number of 40.
  • the residue contains 1.1% by weight of nitrogen.
  • a substituted succinic anhydride is prepared by reacting maleic anhydride with a chlorinated copolymer of isobutylene and isoprene.
  • the copolymer consists of 99 parts by weight of isobutylene units and 1% by weight of isoprene units.
  • the molecular weight of the copolymer is 28,000 and the chlorine content of the chlorinated copolymer is 1.95%.
  • the resulting alkenyl succinic anhydride had an acid number of 54.
  • a polyisobutenyl succinic anhydride is prepared by the reaction of a chlorinated polyisobutylene with maleic anhydride.
  • the chlorinated polyisobutylene has a chlorine content of 2% and an average molecular weight of 11,000.
  • the polyisobutenyl succinic anhydride has an acid number of 48.
  • a mixture of 410 grams (0.35 equivalent) of this anhydride, 15 grams (0.35 equivalent) of Polyamine H and 500 grams of toluene is heated at reflux temperature for four hours to remove water from an azeotrope with toluene. The toluene then is removed by heating to 150 C./20 millimeters. The nitrogen content of the residue is 1.3%.
  • a polyisobutenyl-substituted succinic acid is prepared by hydrolysis of the corresponding anhydride (prepared in turn by the condensation of a chlorinated polyisobutylene and maleic anhydride).
  • a 70% mineral oil solution of this polyisobutenyl succinic acid having an acid number of 62 there is added at room temperature 59.5 grams (1.5 equivalents) of Polyamine H.
  • This mixture is heated at 150-167 C. for 7 hours during which time a total of 19.5 grams of water is distilled from the mixture.
  • the residue is diluted with 174 grams of mineral oil and then filtered at 150 C.
  • the filtrate has a nitrogen content of 1.6%.
  • EXAMPLE 16 A mixture of 1056 grams (2.0 equivalents) of the poly isobutenyl succinic anhydride of the preceding example (in which the polyisobutenyl group has a molecular weight of 850), 89 grams (2.0 equivalents) of di(1,2- propylene) triamine (having a nitrogen content of 31.3%), 370 grams of mineral oil and 100 grams of toluene is heated at reflux temperature (180-190 C.) for hours. A total of 18 grams of Water is collected from the water-toluene azeotrope. The residue is heated to 150 C./20 mm. to remove any last traces of water which might have remained. The nitrogen analysis of this residue is 1.9%.
  • EXAMPLE 17 A polyisobutylene having an average molecular weight of 50,000 is chlorinated to a chlorine content of by Weight. This chlorinated polyisobutylene is reacted with maleic anhydride to produce the corresponding polyisobutenyl succinic anhydride having an acid number of 24. To 6,000 grams (2.55 equivalents) of this anhydride there is added portionwise at 70105 C. 108 grams (2.55 equivalents) of Polyamine H over a period of 45 minutes. The resulting mixture is heated for four hours at 160-180 C. While nitrogen is bubbled throughout to remove water. When all of the water has been removed the product is filtered and the filtrate found to have a nitrogen content of 0.6%.
  • EXAMPLE 18 A mixture of 1 equivalent of a polyisobutene-substituted succinic anhydride having an acid number of 98 (prepared according to the procedure described in Example 1) and 1 equivalent of an acrolein-ammonia...
  • EXAMPLE 19 A cyanoethyl-substituted ethylene amine is prepared by The residue is found to have V mixing 212 grams of acrylonitrile with 216 grams of an ethylene amine mixture consisting of 75% by weight of triethylene tetramine and 25% by weight of diethylene triamine at room temperature and heating the mixture at 1l0130 C. for 5 hours and then to 125 C./30 mm. To a mixture of 1110 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 825 grams of mineral oil there is added at 60 C. 143 grams dropwise of the above cyanoethyl-substituted ethylene amine (having a nitrogen content of 31.8%). The mixture is heated at 150 C.160 C. for 5 hours while being purged with nitrogen. A total of 6 cc. of water is removed by distillation. The residue has a nitrogen content of 1.66%.
  • EXAMPLE 20 To a mixture of 430 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 355 grams of mineral oil there is added at 60-80 C. 108 grams of N-aminopropyl morpholine throughout a period of 1 hour. The mixture is heated at 150155 C. for 5 hours until no more water distills. The residue is found to have a nitrogen content of 2.3%.
  • EXAMPLE 22 To a mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 500 grams of mineral oil there is introduced at 150-160 C. beneath its surface a sufficient quantity of ammonia for formation of an imide Within a period of 1 hour. The mixture is diluted with 169 grams of mineral oil, heated to 150 C. and filtered. The filtrate is found to have a nitrogen content of 0.77%. 1
  • EXAMPLE 23 A mixture of 286 grams of polyisobutene-substituted succinic anhydride of Example 1, 96 grams of N,N-dibutyl ethylene-diamine and 252 grams of mineral oil is prepared at 60 C. and heated at l50l65 C. for 5 hours while being purged with nitrogen. The residue is found to have a nitrogen content of 2.24%.
  • EXAMPLE 24 A mixture of 417 grams of polyisobutene-substituted succinic anhydride of Example 1, 30 grams of N-(2- aminoethyl) trimethylene diamine and 293 grams of mineral oil is prepared at 60-80 C. and then heated at 150155 C. for 5 hours while being purged with nitrogen. The residue is found to have a nitrogen content of 1.51.
  • EXAMPLE 25 A mixture of 430 grams of the polyisobutene-substituted succinic anhydride of Example 1, 64 grams of 1,1- (dimethylaminoethyl)-4-methyl-piperazine and 324 grams of mineral oil is prepared at 60 C. and then heated at 150-155 C. while being blown with nitrogen. The residue is found to have a nitrogen content of 1.81%.
  • EXAMPLE 26 A mixture of 416 grams of polyisobutene-substituted succinic anhydride of Example 1, 124 grams of N-phenyl piperazine and 356 grams of mineral oil is prepared at 60 C. and then heated at 150-155 C. for 5 hours While being purged with nitrogen. No water is removed by such heating. The residue is found to have a nitrogen content of 2.07%.
  • EXAMPLE 27 A mixture of 1110 grams of polyisobutene-substituted succinic anhydride of Example 1, grams of anthranilic acid and 844 grams of mineral oil is heated at 100 C. for 2 hours. The mixture is cooled and is mixed with 72 grams of a mixture consisting of 75% by weight of triethylene tetramine and 25% by weight of diethylenetriamine at 60-80 C. The resulting mixture is heated at -455 C. for 5 hours while being purged with nitrogen. The residue is found to have a nitrogen content of 1.72%.
  • a diisobutenyl-substituted ethylene amine is prepared by reacting 590 grams of diisobutenyl chloride and 264 grams of a mixture consisting of 75 by Weight of triethylene tetramine and 20% by weight of diethylene triamine in the presence of 264 grams of potassium hydroxide (85% purity) and 2200 grams of isopropyl alcohol at 85 90 C.
  • a mixture of 528 grams of polyisobutenesubstituted succinic anhydride of Example 1 101 grams of the above diisobutenyl-substituted ethylene amine and 411 grams of mineral oil is heated at 150-160 C. while being purged with nitrogen until no more water distills. The residue has a nitrogen content of 1.98%.
  • EXAMPLE 29 A mixture of 45 grams of di-(polypropoxy)cocoamine having a. molecular weight of 2265, 22 grams of polyisobutene-substituted succinic anhydride of Example 1 and 44 grams of mineral oil is heated at 150-155 C. for 7 hours. The residue is found to have a nitrogen content of 0.25%.
  • EXAMPLE 30 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 159" grams of menthane diamine and 500 grams of mineral oil is prepared at 70-100 C. and heated at 150-190 C. While being blown with nitrogen until no Water distills. The residue is diluted with 258 grams of mineral oil and the solution is found to have a nitrogen content of 1.32.
  • a polypropylene-substituted succinic anhydride having an acid number of 84 is prepared by the reaction of a chlorinated polypropylene having a chlorine content of 3% and molecular weight of 1200 with maleic anhydride.
  • a mixture of 813 grams of the polypropylene-substituted succinic anhydride, 50 grams of a commercial ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine and 566 grams of mineral oil is heated at 150 C. for 5 hours. The residue is found to have a nitrogen content of 1.18%.
  • EXAMPLE 32 A mixture of 206 grams of N,N'-disecondary-butyl p-phenylene diamine, 1000 grams of the polyisobutenesubstituted succinic anhydride of Example 1 and 500 grams of mineral oil is prepared at 85 C. and heated at 150200 C. for 9.5 hours. The mixture is diluted with 290 grams of mineral oil, heated to 160 C. and filtered. The filtrate is found to have a nitrogen content of 1.29%.
  • EXAMPLE 33 To 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 500 grams of mineral oil there is added 17.6 grams of hydrozine at 70-80 C. The reaction is exothermic. The mixture is heated at 140-150 C. for 1 hour whereupon 9 grams of water is collected as the distillate. To the residue there is then added grams of an ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine at 7080 C. The mixture is then heated at 150-160 C. While being purged with nitrogen until no more water is removed by distillation. The residue is diluted with 200 grams of mineral oil, heated to 160 C. and filtered. The filtrate has a nitrogen content of 1.16%.
  • EXAMPLE 34 To a solution of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1 in 500 grams of mineral oil there is added 28 grams of 1,1-dimethyl hydrazine at -60 C. The mixture is heated at 95 C. for 3 hours and then mixed with 40 grams of an ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine at C. The mixture is then heated at 150-185 C. for 6 hours whereupon 14 grams of water is collected as the distillate. The residue is diluted with 197 grams of mineral oil, heated to 160 C. and filtered. The filtrate has a nitrogen content of 1.53%.
  • EXAMPLE 35 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 333 grams of 1,2-di(3-aminopropoxy) ethane and 500 grams of mineral oil is heated at -170 C. for 5 hours whereupon 18 grams of water is collected as the distillate. The residue is diluted with 380 grams of mineral oil, heated nitrogen.
  • the filtrate has a nitrogen content of 2.3%.
  • EXAMPLE 36 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 418 grams of di(3-arninopropoxy ethyl) ether and 500 grams of mineral oil is heated at -170 C. for 4 hours. A total of '17 grams of water is collected as the distillate. residue is diluted with 433 grams of mineral oil heated to 160 C. and filtered. The filtrate has the nitrogen content of 2.18%.
  • EXAMPLE 38 A mixture of 1000 grams of the polyisobutene-substituted succinicanhydride of Example 1, 254 grams of aminoguanidine bicarbonate and 500 grams of mineral oil is prepared at 80 C. and heated at 130165 C. for 5 hours. The residue is mixed with 223 grams of mineral oil, heated to 150 C., and filtered. The filtrate has the nitrogen content of 3.38%.
  • EXAMPLE 39 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 178 grams of 2 amino-pyridine and 500 grams of mineral oil is heated at 140175 C. for 10 hours while being purged with A total of 16 grams of water is collected as the distillate. The residue is diluted with 273 grams of mineral oil and filtered. The filtrate has a nitrogen content of 2.55%.
  • EXAMPLE 40 A mixture of 1000 grams of the polyisob'utene-substituted succinic anhydride of Example 1, 103 grams of 2,6-diamino-pyridine and 500 grams of mineral oil is heated at 140180 C. for 11 hours while being purged with nitrogen. A total of 16 grams of water is collected as the distillate. The residue is diluted with 223 grams of mineral oil, heated to 150 Crand filtered. The filtrate has a nitrogen content of 2.15%.
  • EXAMPLE 41 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 159 grams of cyanoguanidine and 233 grams of toluene is heated at the reflux temperature of 14 hours while 7.15 grams of water is removed by azeotropic distillation. The mixture is diluted with 740 grams of mineral oil and toluene is then removed by heating the mixture to 150 C. The residue is filtered and the filtrate has the nitrogen content of 4.74%.
  • a nitrogen-containing compound is prepared by mixing 100 grams of cyanoguanidine with 500 grams of ethylene amine mixture having an average composition corresponding to that of tetraethylene penta-mine and heating the mixture at 70-80 C. for 3 hours to obtain a homogeneous mass and filtering the mass.
  • a mixture of 1000 grams of the polyisobutene-substituted succinic anyhdride of Example 1, 96 grams of the above filtrate and 164 grams of toluene is heated at the reflux temperature for hours. The toluene is then removed by heating the mixture to 150 C./ mm. The residue is diluted with 400 grams of mineral oil and filtered. The filtrate has a nitrogen content of 3.43%.
  • EXAMPLE 44 To a mixture of 544 grams of the polyisobutene-substituted succinic anhydride of Examples 1, 283 grams of mineral oil and 281 grams of toluene there is added grams of urea at C. The resulting mixture is heated at 130l35 C. for 11 hours whereupon 2.5 cc. of water is removed as the distillate. The residue is then heated to 140 C./ 20 mm. and filtered. The filtrate has a nitrogen content of 1%.
  • EXAMPLE 45 A mixture of 1088 grams of the polyisobutene-substituted succinic anhydride of Example 1, 106 grams of dipropylene triamine, 500 grams of toluene is heated at the reflux temperature for 4 hours until no more water distills. The residue is then heated to 150 C./20 mm. and diluted with 392 grams of mineral oil. The oil solution is found to have a nitrogen content of 1.74%.
  • EXAMPLE 46 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 174 grams of tphenylbiguanide and 270 grams of toluene is heated at the reflux temperature for 6.5 hours whereupon 25 grams of water is removed by distillation. The residue is diluted with 500 grams of mineral oil and heated to 160 C./20 mm. to distill off toluene. The residue is diluted further with 265 grams of mineral oil, heated to 150 C. and filtered. The filtrate has a nitrogen content of 3.4%.
  • EXAMPLE 47 A mixture of 920 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 249 grams of bis-(dimethylaminopropyl) amine is heated at reflux temperature until no more water distills. The residue has a nitrogen content of 4%.
  • EXAMPLE 48 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 363 grams of aminopropyl octadecylamine and 1314 grams of mineral oil is heated at 200 C. for 24 hours. The residue is filtered. The filtrate has a nitrogen content of 1.02%.
  • EXAMPLE 49 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 258 grams of di-n-butyla-mine is heated at 185 C. for 12 hours and then to 200 C./25 mm. The residue is diluted with 1157 grams of mineral oil and filtered. The filtrate has a nitrogen content of 0.8%.
  • EXAMPLE 50 A mixture of 297 grams of thepolyisobutene-substituted succinic anhydride of Example 1, 25 grams of melamine and 200 grams of mineral oil is heated at 190260 C. for 9 hours and then at 290-295 C. for 7 more hours. The residue is mixed with 50 grams of Water, heated at reflux for 7 hours, dried and filtered. The filtrate has a nitrogen content of 2%.
  • EXAMPLE 5 2 A mixture of 1.0 equivalent of a mono-carboxylic acid (prepared by chlorinating a polyisobutene having a molecular weight of 750 to a product having a chlorine content of 3.6% by weight, converting the product to the corresponding nitrile by reaction with an equivalent amount of potassium cyanide in the presence of a catalytic amount of cuprous cyanide and hydrolyzing the resulting nitrile by treatment with 50% excess of a dilute aqueous sulfuric acid at the reflux temperature) and 0.5 equivalent of ethylene diamine is mixed with twice its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by distillation. The mixture is heated further and the xylene is removed by distillation under reduced pressure. The residue is the acylated nitrogen compound.
  • a mono-carboxylic acid prepared by chlorinating a polyisobutene having a molecular weight of 750 to a product having a chlorine content of 3.6% by weight,
  • EXAMPLE 5 3 A methyl ester of a high molecular weight monocarboxylic acid is prepared by heating an equi-molar mixture of a chlorinated polyisobutene having a molecular weight of 1000 and a chlorine content of 4.7% by weight and methyl methacrylate at -20 C. The resulting ester is then heated with a stoichiometrically equivalent amount of triethylene tetramine at 100-200 C. to produce an acylated nitrogen compound of this invention.
  • a dimethyl Wax-substituted malonate is prepared by reacting dimethyl malonate with sodium ethoxide to form a sodium derivative of the ester, heating the sodium derivative with a brominated wax having 75 carbon atoms and 1 bromine atom per molecule.
  • a mixture of 1.0 equivalent of the ester of 1.0 equivalent of N,N-dibutyl thiourea is dissolved in five times its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by azeotropic distillation. The mixture is heated further and the xylene is removed by distillation. The residue is the acylated nitrogen compound.
  • EXAMPLE 55 A high molecular weight mono-carboxylic acid is prepared by telomerizing ethylene with carbon tetrachloride to a telomer having an average of 35 ethylene radicals per molecule and hydrolyzing the telomer to the corresponding acid in accordance with the procedure described in British Patent No. 581,899.
  • a mixture of 1.5 equivalent of the acid and 0.75 equivalent of amino-propyl octylamine is mixed with twice its volume of a mineral oil and twice its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by azeotropic distillation. Xylene is then removed by distillation under reduced pressure and the residue is filtered.
  • EXAMPLE 56 A mixture of 2000 grams of mineral oil, 3 equivalents of trimethylene diamine and 3 equivalents of a high molecular weight tricarboxylic acid prepared by the reaction of a brominated poly (l-hexene) having a molecular weight of 2000 and a bromine content of 4% by weight of 2-pentene-1,3,5-tricarboxylic acid (prepared by dehydration of citric acid) is heated at C. for 20 hours. The residue is filtered to give a homogeneous mineral oil solution of the acylated nitrogen product.
  • a brominated poly (l-hexene) having a molecular weight of 2000 and a bromine content of 4% by weight of 2-pentene-1,3,5-tricarboxylic acid (prepared by dehydration of citric acid) is heated at C. for 20 hours.
  • the residue is filtered to give a homogeneous mineral oil solution of the acylated nitrogen product.
  • EXAMPLE 57 An equi-molar mixture of 2-aminoethyl morpholine and a mono-carboxylic acid (prepared by the reaction of ketene with a brominated poly l-octene) having a molecular weight of 1500 and one atom of bromine per molecule) is diluted with three times its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by distillation. The residue is a xylene solution of the acylated nitrogen compound.
  • EXAMPLE 58 A mixture of 1 equivalent of menthane diamine and 1 equivalent of a high molecular glutaric acid-ester (prepared by the reaction of silver with an equi-molar mixture of betaiodopropanoic acid and alpha-iodo derivative of the methyl ester of the mono-carboxylic acid of the preceding example) is diluted with an equal weight of a mineral oil and the resulting solution is heated at 180 C. until no more water distills. The residue is then filtered.
  • a high molecular glutaric acid-ester prepared by the reaction of silver with an equi-molar mixture of betaiodopropanoic acid and alpha-iodo derivative of the methyl ester of the mono-carboxylic acid of the preceding example
  • EXAMPLE 59 A high molecular weight dicarboxylic acid is prepared by reacting two moles of the omega-bro'mo derivative of the hexapenta contanoic acid of the preceding example with one mole of zinc. The dicarboxylic acid is then treated with 2 equivalents of ethylene diamine to produce a diamide.
  • EXAMPLE 61 A mixture of 1 equivalent of 1-aminoethyl-2-octadecylimidazoline with 1 equivalent of the high molecular weight mono-carboxylic acid of Example 55 is mixed with twice its volume of diphenyl oxide. The resulting mixture is heated at the reflux temperature until no more The residue is then filtered.
  • EXAMPLE 62 A product is obtained by the procedure described in the preceding example except that N.N-di-n-butyl-pphenylenediamine (1 equivalent) is used in lieu of the imidazoline used.
  • EXAMPLE 63 To a solution of 1 equivalent of di-methyl ester of a polyethylene (molecular weight of 1500)-substituted malonic acid in 5000 grams of xylene, there is added 1 mole of melamine at 60 C. The resulting mixture is heated at the reflux temperature for 25 hours. The residue is mixed with 2000 grams of mineral oil and xylene is removed by heating the oil solution to 180 C/2 EXAMPLE 64 A product is obtained by the procedure of Example 1, except that pyrrolydine (1 equivalent) is used in lieu of the ethylene diamine used.
  • EXAMPLE 65 A product is obtained by the procedure of Example 1, except that hexahydro-1,3,5-triazine (1 equivalent) is used in lieu of the ethylene diamine used.
  • EXAMPLE 67 A product is obtained by the procedure of Example 1, except that hexamethylene tetramine (2 equivalents) is used in lieu of the ethylene diamine used.
  • EXAMPLE 68 A product is obtained by the procedure of Example 1, except that tripentylene tetramine (3 equivalents) is used in lieu of the ethylene diamine used,
  • EXAMPLE 69 An equi-molar mixture of the polyisobutene-substituted succinic anhydride of Example 1 and N-octyl thiourea is diluted with an equal volume of xylene. The resulting mixture is heated at the reflux temperature for 30 hours. The residue is a xylene solution of the product.
  • EXAMPLE 70 A product is obtained by the procedure of Example 69 except that oleylamide is used in lieu of the thiourea used.
  • EXAMPLE 71 A product is obtained by the procedure of Example 69 except that 1,3-diphenyl guanidine is used in lieu of the thiourea used.
  • EXAMPLE 72 A product is obtained by the procedure of Example 69 except that octadecamidine is used in lieu of the thiourea used.
  • EXAMPLE 73 A product is obtained by the procedure of Example 69 except that guanylurea is used in lieu of the thiourea used.
  • EXAMPLE 75 A mixture of 308 grams of mineral oil, 400 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 70 grams of N-(2-ethylhexyl)-trimethylene diamine was prepared at 60 C. The mixture was heated to 250 C. and was then blown with nitrogen at 150- 155 C. for 5 hours. The residue had a nitrogen content of 1.4%.
  • EXAMPLE 76 A mixture of 386 grams of mineral oil, 528 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 59 grams of N-(2-hydroxyethyl)-trimethylenediamine was prepared at 60 C. The mixture was blown with nitrogen at 150-155 C. for 5 hours. The residue had a nitrogen content of 1.56%.
  • EXAMPLE 77 A mixture of 185 grams of mineral oil, 330 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 88.5 grams of 1,4-bis(2-hydroxypropyl) 2-methyl piperazine was prepared at 60 C. The mixture was heated at 180276 C./40 mm. for 14.5 hours. The residue had a nitrogen content of 1.12%.
  • EXAMPLE 79 A mixture of 382 grams of mineral oil, 528 grams of the polyisobut-ene-substituted succinic anhydride of Example 1, and 53 grams of 1-methyl-4-'(3-aminopropyl)- piperazine was prepared at 60 C., heated to 150 C., and blown with nitrogen at 150-155 C. for 5 hours. The residue had a nitrogen content of 1.57%.
  • EXAMPLE 80 To a mixture of 800 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 175 grams of toluene there was added 77 grams of a commercial mixture of alkylene amines and hydroxy alkyl-substituted alkylene amines consisting of approximately 2% (by weight) of diethylene triamine, 36% of 1-(2-aminoethyDpiperazine, 11% of 1-(2-hydroxyethyl)piperazine, 11% of N-(Z-hydroxyethyl)ethylenediamine, and 40% of higher homologues obtained as a result of condensation of the above-indicated amine components.
  • the resulting mixture was heated at the reflux temperature for 16.5 hours whereupon 12 cc. of water was collected as the distillate. The residue was then heated to 160 C./25 mm. and diluted with 570 grams of mineral oil. The final product was found to have a nitrogen content of 1.57%.
  • EXAMPLE 81 A product is obtained by the procedure of Example 69 except that an equimolar mixture of ammonia and bis- (2-hydroxyethyl)amine is used in lieu of the thiourea used.
  • EXAMPLE 82 A product is obtained by the procedure of Example 69 except that an equimolar mixture of benzidine is used in lieu of the thiourea used.
  • EXAMPLE 83 An alkenyl succinic anhydride in which the alkenyl group has less than 50 carbon atoms is prepared from a polyisobutylene having an average molecular weight of 375. This polymer is chlorinated to a chlorine content of 9.7% and then reacted with maleic anhydride. The resulting polyisobutenyl succinic anhydride has an acid number of 190 and an equivalent weight of 300. The procedure of Example is followed using 1.0 equivalent of this polyisobutenyl succinic anhydride and 1.0 equivalent of Polyamine H. The resulting product then is diluted with mineral oil to a 58% solution therein; the nitrogen content is 3.2%
  • EXAMPLE 84 Another alkenyl succinic anhydride in which the alkenyl group has less than 50 carbons is prepared by alkylation of maleic anhydride with tetrapropylene. Equivalent amounts of this tetra-propenyl succinic anhydride and triethylene tetramine in toluene are heated at reflux temperature until substantially all of the water is removed. The toluene then is removed by heating at 155 C. under reduced pressure and the residue is dissolved in chlorine oil to a 60% solution. This oil solution is found to have a nitrogen content of 4.8%.
  • EXAMPLE 85 A polyisobutene having an average molecular weight of 520 (corresponding to 37 carbon atoms) is chlorinated to a chlorine content of 6.25% and then is made to react with an equivalent amount of maleic anhydride to yield a polyisobutene-substituted succinic anhydride having a saponification of 152. To 552 grams (1.5 equivalents) of this anhydride dissolved in 276 grams of mineral oil there is added at 60 C. 63 grams (1.5 equivalents) of Polyamine H portionwise over a period of 1 hour. The resulting mixture is heated for 6 hours at 150 C. and then blown with nitrogen at this temperature for 1 hour. The residue is diluted with grams of mineral oil and the final oil solution is found to have a nitrogen content of 2.1%.
  • acylated nitrogen-containing composition is usually present in lubricating oils in amounts ranging from about 0.1% to about 10% by Weight.
  • the optimum amounts for a particular application depend to a large measure upon the type of surface to which the lubricating composition is to be subjected.
  • lubricating compositions for use in gasoline internal combustion engines may contain from about 0.5 to about 5% of an acylated nitrogen-containing composition, whereas lubricating compositions for use in gears and diesel engines may contain as much as 10% or even more of the additive.
  • additives include, for example, detergents of the ash-containing type, viscosity index improving agents, pour point depressing agents, anti-form agents, extreme pressure agents, rustinhibiting agents, and oxidation and corrosion inhibiting agents.
  • the ash-containing detergents are exemplified by oilsoluble neutral and basic salts of alkali or alkaline earth metals with sulfonic acids, carboxylic acids, or organic phosphorus acids characterized by at least one direct carbon-to-phosphorus linkage such as those prepared by the treatment of an olefin polymer '(e.g., polyisobutene having a molecular weight of 1000) with a phosphorizing agent such as phosphorus trichloride, phosphorus heptasulfide, phosphorus pentasulfide, phosphorus trichloride and sulfur, *W-hite phosphorus and a sulfur halide, or phosphorothioic chloride.
  • phosphorizing agent such as phosphorus trichloride, phosphorus heptasulfide, phosphorus pentasulfide, phosphorus trichloride and sulfur, *W-hite phosphorus and a sulfur halide,
  • the term basic salt is used to designate the metal salts wherein the metal is present in stoichiometrically larger amounts than the organic acid radical.
  • the com monly employed methods for preparing the basic salts involves heating a mineral oil solution of an acid with a stoichiometric excess of a metal neutralizing agent such as the metal oxide, hydroxide, carbonate, bicarbonate, or sulfide at a temperature above 50 C. and filtering the resulting mass.
  • a metal neutralizing agent such as the metal oxide, hydroxide, carbonate, bicarbonate, or sulfide
  • Examples of compounds useful as the promoter include phenolic substances such as phenol, naphthol, alkylphenol, thiophenol, sulfurized alkylphenol, and condensation products of formaldehyde with a phenolic substance; alcohols such as methanol, 2-propanol, octyl alcohol, cellosolve, carbitol, ethylene glycol, stearyl alcohol, and cyclohexyl alcohol; amines such as aniline, phenylenediamine, phenothiazine, phenyl-betanaphthylamine, and dodecylamine.
  • a particularly effective method for preparing the basic salts comprises mixing an acid with an excess of a basic alkaline earth metal neutralizing agent, a phenolic promoter compound, and a small amount of Water and carbonating the mixture at an elevated temperature such as 60200 C.
  • chlorinated aliphatic hydrocarbons such as chlorinated wax
  • organic, sulfides and polysulfides such as benzyl disulfide, bis (chlorobenzyl) disulfide, dibutyl tetrasulfide, sulfurized sperm oil, sulfurized methyl ester of oleic acid, sulfurized alkylphenol, sulfurized dipentene, and sulfurized terpene, phosphosulfurized hydrocarbons such as the reaction product of a phosphorus sulfide with turpentine or methyl oleate; phosphorous esters including principally dihydrocarbon and trihydrocarbon phosphites such as dibutyl phosphite, diheptyl phosphite, dicyclohexyl phosphite, pentyl phenyl phosphite, dipentyl
  • the lubricating compositions may also contain metal detergent additives in amounts usually Within the range of about 0.1% to about 20% by weight. In some applications such as in lubricating marine diesel engines the lubricating compositions may contain as much as 30% of a metal detergent additive. They may also contain extreme pressure addition agents, viscosity index improving agents, and pour point depressing agents, each in amounts within the range of from about 0.1% to about 10%.
  • EXAMPLE B SAE 30 mineral lubricating oil containing 0.75% of the product of Example 2 and 0.1% of phorphorus as the barium salt of di-n-nonylphosphorodithioic acid.
  • EXAMPLE D SAE 90 mineral lurbicating oil containing 0.1% of the product of Example 7 and 0.15% of the zinc salt of an equimolar mixture of di-cyclohexylphosphorodithioic acid and di-disobutyl phosphorodithioic acid.
  • EXAMPLE G SAE 10W-30 mineral lubricating oil containing 1.5% of the product of Example 25 and 0.05% of phosphorus as the zinc salt of a phosphorodithioic acid prepared by the reaction of phosphorus pentasulfide with a mixture of 60% (mole) of p-butylphenol and 40% (mole) of npentyl alcohol.
  • EXAMPLE H SAE 50 mineral lubricating oil containing 3% of the product of Example 36 and 0.1% of phosphorus as the calcium salt of di-hexylphosphorodithioate.
  • EXAMPLE I SAE 10W30 mineral lubricating oil containing 2% of the product of Example 48, 0.06% of phosphorus as zinc di-n-octylphosphorodithioate, and 1% of sulfate ash as barium mahogany sulfonate.
  • EXAMPLE I SAE 30 mineral lubricating oil containing 5% of the product of Example 59, 0.1% of phosphorus as the zinc EXAMPLE K
  • EXAMPLE L SAE 10 mineral lubricating oil containing 2% of the product of Example 74, 0.075% of phosphorus as the adduct of zinc di-cyclohexylphosphorodithioate treated with 0.3 mole of ethylene oxide, 2% of sulfurized sperm oil having a sulfur content of 10%, 3.5% of a poly-(alkyl methacrylate) viscosity index improver, 0.02% of a poly- (alkyl methacrylate) pour point depressant, 0.003% of a poly-(alkyl siloxane) anti-foam agent.
  • EXAMPLE M SAE 10 mineral lubricating oil containing 1.5% of the product of Example 51, 0.075% of phosphorus as the adduct obtained by heating zinc di-nonylphosphorodithioate with 0.25 mole of 1,2-hexene oxide at 120 C., a sulfurized methyl ester of tall oil acid having a sulfur content of 15%, 6% of a polybutene viscosity index improver, 0.005% of a poly-(alkyl methacrylate) antifoam agent, and 0.5 of lard oil.
  • EXAMPLE N SAE 20 mineral lubricating oil containing 1.5% of the product of Example 13, 0.5% of di-dodecyl phosphite, 2% of the sulfurized sperm oil having a sulfur content of 9%, a basic calcium detergent prepared by carbonating a mixture comprising mineral oil, calcium mahogany sulfonate and 6 moles of calcium hydroxide in the presence of an equi-molar mixture (10% of the mixture) of methyl alcohol and n-butyl alcohol as the promoter at the reflux temperature.
  • EXAMPLE 0 SAE 10 mineral lubricating oil containing 2% of the product of Example 7, 0.07% of phosphorus as zinc dioctylphosphorodithioate, 2% of a barium detergent prepared by neutralizing With barium hydroxide the hydrolyzed reaction product of a polypropylene (molecular weight 2000) with 1 mole of phosphorus pentasulfide and 1 mole of sulfur, 3% of a barium sulfonate detergent prepared by carbonating a mineral oil solution of mahogany acid, and a 500% stoichiometrically excess amount of barium hydroxide in the presence of phenol as the promoter at 180 C., 3% of a supplemental ashless detergent prepared by copolymerizing a mixture of 95% (weight) of decyl-methacrylate and 5% (Weight) of diethylaminoethylacrylate.
  • EXAMPLE Q SAE 10 mineral lubricating oil containing 3% of the product of Example 16, 0.075% of phosphorus as the 23 zinc salt of a phosphorodithioic acid prepared by the reaction of phosphorus pentasulfide with an equimolar mixture of n-butyl alcohol and dodecyl alcohol, 3% of a barium detergent prepared by carbonating a mineral oil solution containing 1 mole of perm oil, 0.6 mole of octylphenol, 2 moles of barium oxide, and a small amount of water at 150 C.
  • EXAMPLE R SAE 20 mineral lubricaitng oil containing 2% of the product of Example 17 and 0.07% of phosphorus as zinc di-n-octylphosphorodithioate.
  • crankcase lubricants used in taxicabs which had been operated for over 50,000 miles each.
  • ten 6-cylinder 1958 Chevrolet cars (with no oil filters) were operated as a fleet of taxicabs.
  • the crankcase lubricant was a solvent refined Mid-Continent petroleum oil having a viscosity of 185 SUS/ 100 F.
  • crankcase oil drains were taken from each car at oilchange intervals of about 3,000 miles of service and these drains combined.
  • a 30-cc. sample of each of the combined drains was mixed with 1% by weight of the dispersant additive to he tested and 2% by weight of water. This mixture then was homogenized, placed in a 100-cc. graduated cone-shaped centrifuge tube and centrifuged for two hours at 1500 rpm.
  • the clarity of the supernatant oil layer was determined by the amount of light transmitted through it from a 3- volt, 0.75 Watt incandescent bulb.
  • the dispersant properties of the compositions of this invention may be illustrated also by the results of an oxidation-dispersancy test which is useful as a screening test for determining the effectiveness of the dispersant additive under light-duty service conditions.
  • a 350-00. sample of a lubricating oil containing the dispersant additive is placed in a 2" x 15" borosilicate tube.
  • a 1%" x 5% SAE 1020 steel panel is immersed in the oil.
  • the sample then is heated at 300 F. for 48 hours while air is bubbled through the oil at the rate of 10 liters per hour.
  • the oxidized sample is cooled to 120 F., homogenized, allowed to stand at room temperature for 24 hours and then filtered through two layers of No.
  • Two modifications of the above procedure may be employed; both make the test more severe: one consists of extending the test from 48 hours to 96 hours, and the other involves adding 0.5% of water, based on the weight of the test sample, to the oxidized oil before homogenization.
  • the lubricating oil employed in this test was a Mid-Continent conventionally refined petroleum oil having a viscosity of about 200 SUS/ 100 F., and containing 0.001% by weight of iron naphthenate (to promote oxidation).
  • the lubricant dispersant addition agent is then rated according to (1) the extent of piston ring-filling, (2) the amount of sludge formed in the engine (on a scale of 80-0, 80 being indicative of no sludge and being indicative of extremely heavy sludge), and (3) the total amount of engine deposits, i.e., sludge and varnish, formed in the engine (on a scale of 100-0, 100 being indicative of no deposits and 0 being indicative of extremely heavy deposits).
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic-acid-producing compound selected from the class consisting of acids, anhydrides, esters and halides having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equivalent of said succinic-acid-producing compound, of an amine, other than an ethylene polyamine, having at least one hydrogen radical attached to the nitrogen radical.
  • a substantially saturated hydrocarbon-substituted succinic-acid-producing compound selected from the class consisting of acids, anhydrides, esters and halides having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equivalent of said succinic-acid-producing compound, of an amine, other than an ethylene polyamine, having at least one
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinicacid-producing compound selected from the class consisting of acids, anhydrides, esters and halides having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equivalent of said succinic-acid-producing compound, of a nitrogen-containing compound, other than an ethylene polyamine, having the formula wherein R and R are selected from the group consisting of hydrogen, hydrocarbon, amino-substituted hydrocarbon other than an ethylene polyamine, hydroxy-substituted hydrocarbon, alkoxy-substituted hydrocarbon, amino, carbamyl, thiocarbamyl, thiocarbamyl and guanyl radicals.
  • a substantially saturated hydrocarbon-substituted succinicacid-producing compound selected from the class consist
  • An oil soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular Weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles per equivalent of said succinic anhydride, of dicyandiamide.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within 26 the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of a hydroxyalkyl alkylene polyamine having up to about 8 carbon atoms in the alkylene group.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of hydroxyethyl piperazine.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of an aminohydrocarbon amine.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of a polyalkylene polyamine having at least three methylene groups in the alkylene radicals.
  • An oil-soluble acylated nitrogen composition pre pared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of di(trimethylene) triamine.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of an alkylamine.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of dodecylamine.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic-acid-producing compound selected from the class consisting of esters and halides and having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equlvalent of said succinic-acid-producing compound, of an ethylene polyamine.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic-acid-producing compound selected from the class consisting of esters and halides, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles,
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic anhydride having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, With from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of ammonia.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic anhydride having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles per equivalent of said succinic anhydride, of dicyandiamide.
  • An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 30 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic 28 anhydride having at least about aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of hydroxyethyl piperazine.
  • a composition comprising an oil-soluble acylated nitrogen compound characterized by the presence within its structure of (A) a substantially saturated hydrocarbonsubstituted polar group containing a radical selected from the class consisting of succinoyl, succinimidoyl and succinoyloxy radicals wherein said substantially saturated hydrocarbon substituent contains at least about 50 aliphatic carbon atoms, and (B) a nitrogen-containing group characterized by a nitrogen atom attached directly to said polar group, said acylated nitrogen compound excluding the product of a process which requires the reaction of a substantially hydrocarbon substituted succinic acid or anhydride with an ethylene polyamine.
  • composition comprising an oil-soluble acylated nitrogen compound as in claim 21 wherein the nitrogencontaining group of (B) is an aliphatic amine.
  • NICHOLAS S. RIZZO Primary Examiner.

Description

United States Patent 3,219,666 DERIVATIVES OF SUCCINIC ACIDS AND NITROGEN COMPOUNDS George R. Norman, Lyndhurst, and William M. Le Suer,
Cleveland, Ohio, assignors to The Lubrizol Corporation, Wickliife, Ohio, a corporation of Ohio No Drawing. Filed July 21, 1961, Ser. No. 126,809 22 Claims. (Cl. 260268) This is a continuation-in-part of application Serial No. 802,667, filed March 30, 1959, now U.S. Patent No. 3,172,- 892.
This invention relates to oil-soluble nitrogen-containing compositions and to the process of preparing the same. The compositions of this invention are useful as dispersing agents in lubricants, especially lubricants intended for use in the crankcase of internal combustion engines, gears, and power transmitting units.
One of the principal problems associated with present day crankcase lubricants is that posed by the inevitable presence in the lubricant of foreign particles such as dirt, soot, water and decomposition products resulting from breakdown of the lubricating oil. Even if there were none of this latter contaminant present the very nature of the design of the modern internal combustion engine is such that a significant amount of foreign matter will accumulate in the crankcase. Perhaps the most important of these contaminants is water because it seems to be responsible for the deposition of a mayonnaise-like sludge. It appears that if there were no water present the solid components of the mayonnaise-like sludge would circulate with the oil and be removed by the oil filter. It will be readily appreciated that the deposition of the sludge presents a serious problem with respect to the efficient operation of the engine and that it is desirable to prevent such deposition of sludge-like material.
The presence of water and the precursors of sludge in a lubricating oil is dependent largely upon the operating temperature of the oil. If the oil is operated at a high temperature the water, of course, will be eliminated by evaporation about as fast as it accumulates. In the absence of water as stated above the other foreign particles will be removed by the filter. At low oil temperatures, on the other hand, water will accumulate and so consequently will sludge. It is apparent that the environment in which a crankcase lubricant is maintained will determine to a large extent the ultimate performance of that lubricant.
High operating temperatures are characteristic of a lubricant in an engine that is run at relatively constant high speed. Thus, in an engine that is run at 60 miles per hour for a long period of time it is very unlikely that there will be any accumulation of water and it is similarly unlikely that there will be any formation and deposition of sludge, but in ordinary stop-and-go driving such as is the case with taxicabs, delivery trucks, police cruisers, etc., the crankcase lubricant will be alternately hot and cold, an ideal environment for the accumulation of water. In such cases the formation of sludge is a serious problem. This problem has been with the automotive industry for many years and its solution has been approached by the use of known detergents such as metal phenates and sulfonates but without notable success. Although such known detergents are very effective in solving the detergency problems associated with motor oils at high temperatures they have not been particularly effective in solving the problems associated with low temperature operation or, to put it better, those problems which are associated with crankcase lubricants in engines which are operated at alternating high and low temperatures.
It is accordingly a principal object of this invention to provide novel compositions of matter.
It is also an object of this invention to provide compositions which are adapted for use as additives in hydrocarbon oils.
It is also an object of this invention to provide compositions which are effective as detergents in lubricating compositions.
It is another object of this invention to provide a novel process for the preparation of products which are effective as dispersants in lubricant compositions.
It is another object of this invention to provide novel compositions which are effective dispersants in lubricant compositions intended for use in engines operated at alternating high and low temperatures.
It is another object of this invention to provide improved hydrocarbon oil compositions.
It is another object of this invention to provide improved lubricating compositions.
It is another object of this invention to provide improved fuel compositions.
These and other objects are achieved in accordance with this invention by providing a detergent composition comprising an oil-soluble, acylated nitrogen composition characterized by the presence within its structure of (A) a substantially hydrocarbon-substituted polar group selected from the class consisting of acyl, acylirnidoyl, and acyloxy radicals wherein the substantially hydrocarbon substituent contains at least about 50 aliphatic carbon atoms and (B) a nitrogen-containing group characterized by a nitrogen atom attached directly to said relatively polar group.
A critical aspect of this invention is the size of the substantially hydrocarbon substituent in the acylated nitrogen compounds. Thus, only acylated nitrogen compositions having at least about 50 aliphatic carbon atoms in the substantially hydrocarbon substituent are contemplated as being within the scope of this invention. Furthermore, in the case of acylated nitrogen compositions having two or more polar groups in a molecule, the substantially hydrocarbon substituent must then contain at least about 25 aliphatic carbon atoms per each polar group. This lower limit is based not only upon the consideration of the oil-solubility of the acylated nitrogen compositions but also upon the effectiveness of such compounds as additives in hydrocarbon oils for the purposes of this invention. It has now been discovered that while acylated nitrogen compositions having less than the minimum number of such aliphatic carbon atoms may be sufficiently oil-soluble, they nevertheless are not sufiiciently effective to be useful as additives of this invention. Furthermore, it has been discovered that their effectiveness diminishes sharply with a corresponding decrease in the size of the substantially hydrocarbon substituent so that acylated nitrogen compositions having less than about 35 aliphatic carbon atoms in such substituent either are ineffective or produce detrimental results when added to a hydrocarbon oil.
Another important aspect of this invention is the structural constitution of the substantially hydrocarbon substituent. Thus, the radical preferably should be substantially saturated, i.e., at least about of the total number of carbon-to-carbon covalent linkages are saturated linkages. An excessive proportion of unsaturated linkages renders the molecule susceptible to oxidation, degradation, and polymerization and results in products unsuitable for use in hydrocarbon oils in many applications.
The substantially hydrocarbon substituent of the acylated nitrogen compositions of this invention preferably should be substantially free from large oil-solubilizing pendant groups, i.e., groups having more than about 6 aliphatic carbon atoms. While some large oil-solubilizing pendant groups may be present, they preferably should be present in proportions less than about one such group for every 25 aliphatic carbon atoms in the main hydrocarbon chain. A higher proportion of large pendant groups impairs the efiectiveness of the acylated nitrogen compositions of this invention as additives in hydrocarbon oils.
The substantially hydrocarbon substituent may contain polar substituents provided, however, that the polar substituents are not present in proportions sufliciently large to alter significantly the hydrocarbon character of the radical. The polar substituents are exemplified by chloro, bromo, keto, ethereal, aldehydo, and nitro, etc. The upper limit with respect to the proportion of such polar substituents in the radical is approximately 10% based on the weight of the hydrocarbon portion of the radical.
The sources of the substantially hydrocarbon substituent include principally the high molecular weight substantially saturated petroleum fractions and substantially saturated olefin polymers, particularly polymers of mono-olefins having from 2 to about 30 carbon atoms. The especially useful polymers are the polymers of lmono-olefins such as ethylene, propene, l-butene, isobutene, l-hexene, l-octene, 2-methyl-l-heptene, 3-cyclohexyl-l-butene, and 2-meth'y1-5-propyl-l-hexene. Polymers of medial olefins, i.e., olefins in which the olefinic linkage is not at the terminal position, likewise are useful. They are illustrated by Z-butene, 3-pentene, and 4- octene.
Also useful are the interpolymers of the olefins such as those illustrated above with other interpolymerizable olefinic substances such as aromatic olefins, cyclic olefins, and polyolefins. Such interpolymers include, for ex ample, those prepared by polymerizing isobutene with styrene; isobutene with butadiene; propene with isoprene; ethylene with piperylene; isobutene with chloroprene; isobutene with p-methyl styrene; l-hexene with 1,3-hexadiene; l-octene with l-hexene; l-heptene with l-pentene, S-methybl-butene with l-octene; 3-3-dimethyl-1-pentene with l-hexene; isobutene with styrene and piperylene; etc.
The relative proportions of the mono-olefins to the other monomers in the interpolymers influence the stability and oil-solubility of the final acylated nitrogen compositions derived from such interpolymers. Thus, for reasons of oil-solubility and stability the interpolymers contemplated for use in this invention should be substantially aliphatic and substantially saturated, i.e., they should contain at least about 80% preferably at least about 95%,
on a weight basis of units derived from the aliphatic mono-olefins and no more than about 5% of olefinic linkages based on the total number of carbon-to-carbon covalent linkages. In most instances, the percentage of olefinic linkages should be less than about 2% of the total number of carbon-to-carbon covalent linkages.
Specific examples of such interpolymers include copolymer of 95% (by weight) of isobutene with 5% of styrene; terpolymer of 98% of isobutene with 1% of piperylene and 1% of chloroprene; ter-polymer of 95% of isobutene with 2% of l-butene and 3% of l-hexene; terpolymer of 60% of isobutene with 20% of l-pentene and 20% of l-octene; copolymer of 80% of l-hexene and 20% of l-heptene; terpolymer of 90% of isobutene with 2% of cyclohexene and 8% of propene; and copolymer of 80% of ethylene and 20% of propene.
Another source of the substantially hydrocarbon radical comprises saturated aliphatic hydrocarbons such as highly refined high molecular weight white oils or synthetic alkanes such as are obtained by hydrogenation of high molecular weight olefin polymers illustrated above or high molecular weight olefinic substances.
The use of olefin polymers having molecular weight of about 750-5000 is preferred. Higher molecular weight olefin polymers having molecular weights from about 10,000 to about 100,000 or higher have been found to impart also viscosity index improving properties to the acylated nitrogen compositions of this invention. In many instances the use of such higher molecular weight olefin polymers is desirable. On the other hand, olefin polymers having molecular weights less than about 700 are not useful.
The relatively polar group of the acylated nitrogen compositions is selected from the class consisting of acyl, acylimidoyl, and acyloxy radicals. These radicals have the following structural configurations, respectively:
0 /NR: I Rr--y R1-C/ and R1(LJ'O- wherein R represents the substantially hydrocarbon substituent described hereinbefore and R represents a hydrogen radical or an organic radical such as a hydrocarbon radical or a polar-substituted hydrocarbon radical.
The nitrogen-containing group of the acylated nitrogen compositions of this invention is derived from compounds characterized by a radical having the structural configuration The two remaining valences of the nitrogen atom of the above N-H radical preferably are satisfied by hydrogen, amino, or organic radicals bonded to said nitrogen atom through direct carbon-to-nitrogen linkages. Thus, the compounds from which the nitrogen-containing group may be derived include principally ammonia, aliphatic amines, aromatic amines, heterocyclic amines or carbocyclic amines. The amines may be primary or secondary amines and may also be polyamines such as alkylene amines, arylene amines, cyclic polyamines, and the hydroxy-substituted derivatives of such polyamines.
Specific amines of these types are methylamine, N- rnethyl-ethylamine, N-methyl-octylamine, N-cyclohexylaniline, dibutylamine, cyclohexylamine, aniline, di(pmethylphenyl)amine, dodecylamine, octadecylamine, ophenylenediamine, N,N-di-n-butyl-p-phenylene-diamine, morpholine, piperazine, tetrahydropyrazine, indole, heXahydrO-1,3,5-triazine, 1-H-l,2,4-triazole, melamine, bis-(p aminophenyl)methane, phenyl methylenimine, menthanediamine, cyclohexamine, pyrrolidine, 3-amino 5,6-diphenyl-1,2,4-triazine, quinonediimine, 1,3-indandimine, 2-octadecyl-imidazoline, 2-phenyl-4-methyl-irnidazo lidine, oxazolidine, ethanolamine, diethanolamine, and 2- heptyloxazolidine.
A preferred source of the nitrogen-containing group consists of polyamines, especially alkylene amines conforming for the most part to the formula wherein n is an integer preferably less than about 10, A is a substantially hydrocarbon or hydrogen radical, and the alkylene radical is preferably a lower alkylene radical having less than about 8 carbon atoms. The alkylene amines include principally methylene amines, ethylene amines, butylene amines, propylene amines, pentylene amines, hexylene amines, heptylene amines, octylene amines, other polymethylene amines, and also the cyclic and the higher homologs of such amines such as pipera- Zines and amino-alkyl-substituted piperazines. They are exemplified specfically by: ethylene diamine, triethylene tetramine, propylene diamine, decamethylene diamine, octamethylene diamine, di(heptamethylene) triamine, tripropylene tetramine, tetraethylene pentamine, trimethylene diamine, pentaethylene hexamine, di(trimethylene)triamine, 2-heptyl 3-(2-aminopropyl) imidazoline, 4-methyl-imidazoline, 1,3-bis-(2-aminoethyl) imidazoline, pyrimidine, 1-(2-amino propyl)piperazine, 1-4- bis(2-amin0ethyl) piperazine, and 2-methyl1-(2-aminobutyl)piperazine. Higher homologs such as are obtained by condensing two or more of the above illustrated alkylene amines likewise are useful.
N,N'-diphenylhydrazine,
The ethylene amines are especially useful. They are described in some detail under the heading Ethylene Amines in Encyclopedia of Chemical Technology, Kirk and Othmer, volume 5, pages 898905, Interscience Publishers, New York (1950). Such compounds are prepared most conveniently by the reaction of an alkylene chloride with ammonia. The reaction results in the production of somewhat complex mixtures of alkylene amines, including cyclic condensation products such as piperazines. These mixtures find use in the process of this invention. On the other hand, quite satisfactory products may be obtained also by the use of pure alkylenc amines. An especially useful alkylene amine for reasons of economy as well as effectiveness of the products derived therefrom is a mixture of ethylene amines prepared by the reaction of ethylene chloride and ammonia and having a composition which corresponds to that of tetraethylene pentamine.
Hydroxyalkyl-substituted alkylene amines, i.e., alkylene amines having one or more hydroxyalkyl substituents on the nitrogen atoms, likewise are contemplated for use herein. The hydroxyalkyl-substituted alkylene amines are preferably those in which the alkyl group is a lower alkyl group, i.e., having less than about 6 carbon atoms. Examples of such amines include N-(2-hydroxyethyl)- ethylene diamine, N,N-bis(2-hydroxyethyl)ethylene diamine, 1 (2 hydroxyethyl)piperazine, mono-hydroxypropyl-substituted diethylene triamine, l,4-bis(2-hydroxypropyl) piperazine, dihydroxypropyl-substituted tetraethylene pentamine, N (-3 hydroxypropy-l)tetramethylene diamine and 2-heptadecyl-1-(2-hy-droxyethyl) imidazoline.
Higher homologs such as are obtained by condensation of the above-illustrated alkylene amines or hydroxy alkylsubstituted alkylene amines through amino radicals or through hydroxy radicals are likewise useful. It will be appreciated that condensation through amino radicals results in a higher amine accompanied with removal of ammonia and that condensation through the hydroxy radicals results in products containing ether linkages accompanied with removal of water.
Other sources of the nitrogen-containing group include ureas, thioureas, hydrazines, guanidines, amidines, amides, thioamides, cyanamides, etc. Specific examples illustrating such compounds are: hydrazine, phenylhydrazine,
octadecylhydrazine, benzoylhydrazine, urea, thiourea, N-butylurea, stearylamide, oleylamide, guanidine, 1,3-diphenylguanidine, 1,2,3-tributylguanidine, benzamidine, octadec-amidine, N,N-dimethylsteararnidine, cyanamide, dicyandi'amide, guanylurea, aminoguandine, etc.
As indicated previously, the nitrogen-containing group in the acylated nitrogen compositions of this invention is characterized by a nitrogen atom attached directly to the relatively polar group. It will be apprecitaed of course, that the linkage between a nitrogen atom and an acyl radical is representative of an amide or an imide structure, that the linkage between a nitrogen atom and an acylimidoyl radical is representative of an amidine structure, and that the linkage between a nitrogen atom and an acyloxy radical is representative of an ammonium-carboxylic acid salt structure. Thus, the acylated nitrogen compositions of this invention are characterized by amide, imide, amidine, or salt linkages and in many instances a mixture of such linkages. Those containing two such linkages separated by a lower alkylene radical (i.e., one having less than about 6 carbon atoms), such as are derived from succinic, glutaric, or adipic radicals, are especially preferred in this invention.
A convenient method for preparing the acylated nitrogen compositions of this invention comprises reacting a high molecular weight acid-producing compound characterized by the presence within its structure of a high molecular weight oil-solubilizing group having at least about 50 aliphatic carbon atoms and at least one acidproducing group having the structural configuration.
o H C-X wherein X is selected from the class consisting of halogen, hydroxy, hydrocarbon-oxy, and acyloxy radicals, with at least about one-half an equivalent amount of a nitrogen-containing compound characterized by the presence with its structure of at least one radical having the structural configuration The above process involves a reaction between the acid-producing group with the nitrogen-containing radical to result in the direct attachment of the nitrogen atoms to a polar radical, i.e., acyl, acylimidoyl, or acyloxy radical derived from the acid-producing group. The linkage formed between the nitrogen atom and the polar radical may thus be that representative of a salt, amide, imide, or amidine radical. In most instances the product of the above process contains a mixture of linkages representative of such radicals. The precise relative proportions of such radicals in the product usually are not known as they depend to a large measure upon the type of the acid-producing group and the nitrogen-containing radical involved in the reaction and also upon the environment (e.g., temperature) in which the reaction is carried out. To illustrate, the reaction involving an acid or anhydride group with an amino nitrogen-containing radical at relatively low temperatures such as below about 60 C. results predominantly in a salt linkage but at relatively high temperatures such as above about C results predominantly in an amide, imide, or
' amidine linkage In any event, however, the products obtained by the above process, irrespective of the nature or relative proportions of the linkages present therein, have been found to be effective as additives in hydrocarbon oils for the purposes of this invention.
The acid-producing compounds contemplated for use in the above process include mono-carboxylic and poly- CarbOXylic acids, acid halides, esters, and anhydrides, and also mixtures of such compounds. The nature of the oil-solubilizing group in such compounds should be the same as that which characterized the substantially hydrocarbon substituent, described previously, in the acylated nitrogen compositions of this invention.
The substantially saturated, aliphatic hydrocarbonsubstituted succinic acids and anhydrides are especially preferred for use as the acid-producing reactant in this process for reasons of the particular eifectiveness of the products obtained from such compounds as additives in hydrocarbon oils. The succinic compounds are readily available from the reaction of maleic anhydride with a high molecular weight olefin or a chlorinated hydrocarbon such as the olefin polymer described herein-above. The reaction involves merely heating the two reactants at a temperature about l00-200 C. The product from such a reaction is an alkenyl succinic anhydride. The alkenyl group may be hydrogenated to an alkyl group. The anhydride may be hydrolyzed by treatment with water or steam to the corresponding acid. Either the anhydride or the acid may be converted to the corresponding acid halide or ester by reaction with e.g., phosphorus halide, phenols or alcohols.
In lieu of the high molecular weight hydrocarbons containing an activating polar substituent, i.e., a substituent which is capable of activating the hydrocarbon molecule in respect to reaction with maleic acid or anhydride may be used in the above-illustrated reaction for preparing the succinic compounds. Such polar substituents may be illustrated by sulfide, disulfide, nitro, mercaptan, bromine, ketone, and aldehyde radicals. Examples of such polarsubstituted hydrocarbons include polypropene sulfide, dipolyisobutene disulfide, nitrated mineral oil, di-polyethylene sulfide, brominated polyethylene, etc. Another meth od useful for preparing the succinic acids and anhydrides involves the reaction of itaconic acid with a high molecular weight olefin or a polar-substituted hydrocarbon at a temperature usually within the range from about 100 C. to about 200 C.
The polycarboxylic acids and derivatives thereof having more than two carboxylic radicals per molecule which are contemplated for use in this invention are those containing at least about 50 aliphatic carbon atoms per molecule and furthermore at least about 25 aliphatic carbon atoms per each carboxylic radical. Such acids may be prepared by hal-ogenating a high molecular weight hydrocarbon such as the olefin polymer described hereinabove to produce a poly-halogenated product, converting the poly-halogenated product to a poly-nitrile, and then hydrolyzing the poly-nitrile. They may be prepared also by oxidation of a high molecular weight polyhydric alcohol with potassium permanganate, nitric acid, or a like oxidizing agent. Another method for preparing such polycarboxylic acids involves the reaction of an olefin or a polar-substituted hydrocarbon such as a chloropolyisobutene with an unsaturated poly-carboxylic acid such as Z-pentene-1,3,5-tricarboxylic acid obtained by dehydration of citric acid.
The mono-carboxylic acids and derivatives thereof may be obtained by oxidizing a mono-hydric alcohol with potassium permanganate or by reacting a halogenated high molecular olefin polymer with a ketene. Another convenient method for preparing the mono-carboxylic acids involves the reaction of metallic sodium with an acetoacetic ester or a malonic ester of an alkanol to form a sodium derivative of the ester and the subsequent reaction of the sodium derivative with a halogenated high molecular weight hydrocarbon such as brominated wax or brominated polyisobutene.
The mono-carboxylic and poly-carboxylic acid anhydrides are obtained by dehydrating the corresponding acids. Dehydration is readily accomplished by heating the acid to a temperature above about 70 C. preferably in the presence of a dehydration agent. e.g., acetic anhydride. Cyclic anhydrides are usually obtained from poly-carboxylic acids having the acid radicals separated by no more than three carbon atoms such as substituted succinic or glutaric acids, whereas linear polymeric anhydrides are obtained from poly-carboxylic acids having the acid radicals separated by four or more carbon atoms.
The acid halides of the mono-carboxylic and polycarboxylic acids can be prepared by the reaction of the acids or their anhydrides with a halogenation agent such as phosphorus tribromide, phosphorus pentachloride, or thionyl chloride. The esters of such acids can be prepared simply by the reaction of the acids or their anhydrides with an alcohol or a phenolic compound such as methanol, ethanol, octadecanol, cyclohexanol, phenol, naphthol, octylphenol, etc. The esterification is usually promoted by the use of an alkaline catalyst such as sodium hydroxide or sodium alkoxide or an acidic catalyst such as sulfuric acid. The nature of the alcoholic or phenolic portion of the ester radical appears to have little influence on the utility of such ester as reactant in the process described herein-above.
The nitrogen-containing reactants useful in the above process are the compounds, described previously in this specification, from which the nitrogen-containing group the acylated nitrogen compositions of this invention can be derived.
The above process is usually carried out by heating a mixture of the acid-producing compound and the nitrogencontaining reactant to a temperature above about C., preferably within the range from about C. to about 250 C. However, when an acid or anhydride is employed in reactions with an amino nitrogen-containing reactant, the process may be carried out at a lower temperature such as room temperature to obtain products having predominantly salt linkages or mixed salt-amide linkages. Such products may be converted, if desired, by heating to above 80 C. to products having predominantly amide, imide, or amidine linkages. The use of a solvent such as benzene, toluene, naphtha, mineral oil, xylene, n-hexane, or the like is often desirable in the above process to facilitate the control of the reaction temperature.
The relative proportions of the acid-producing compounds and the nitrogen-containing reactants to be used in the above process are such that at least about one-half of a stoichiometrically equivalent amount of the nitrogencontaining reactant is used for each equivalent of the acid-producing compound used. In this regard it will be noted that the equivalent weight of the nitrogencontaining reactant is based upon the number of the nitrogen-containing radicals defined by the structural configuration N-H. Similarly the equivalent weight of the acid-producing compound is based upon the number of the acid-producing radicals defined by the structural configuration O in Thus, ethylene diamine has two equivalents per mole; amino guanidine has four equivalents per mole; a succinic acid or ester has two equivalents per mole, etc. The upper limit of the useful amount of the nitrogen-containing reactant appears to be about two moles for each equivalent of the acid-producing compound used. Such amount is required, for instance, in the formation of products having predominantly amidine linkages. Be yond this limit, the excess amount of the nitrogencontaining reactant appears not to take part in the reac tion and thus simply remains in the product apparently without any adverse effects. On the other hand, the lower limit of about one-half equivalent of the nitrogencontaining reactant used for each equivalent of the acidproducing compound is based upon the stoichiometry for the formation of products having predominantly imide linkages. In most instances, the preferred amount of the nitrogen-containing reactant is approximately one equivalent for each equivalent of the acid-producing compound used.
The following examples illustrate the processes useful for preparing the acylated nitrogen compounds of this invention:
EXAMPLE 1 A polyisobutenyl succinic anhydride is prepared by the reaction of a chlorinated polyisobutylene with maleic anhydride at 200 C. The polyisobutenyl radical has an average molecular weight of 850 and the resulting alkenyl succinic anhydride is found to have an acid number of 113 (corresponding to an equivalent weight of 500). To a mixture of 500 grams (1 equivalent) of this polyisobutenyl succinic anhydride and 160 grams of toluene there is added at room temperature 35 grams (1 equivalent) of diethylene triamine. The addition is made portionwise throughout a period of 15 minutes, and an initial exothermic reaction caused the temperature to rise to 50 C. The mixture then is heated and a watertoluene azeotrope distilled from the mixture. When no more water would distill the mixture is heated to C. at reduced pressure to remove the toluene. The residue is diluted with 350 grams of mineral oil and this solution r is found to have a nitrogen content of 1.6%.
9 7 EXAMPLE 2 The procedure of Example 1 is repeated using 31 grams (1 equivalent) of ethylene diamine as the amine reactant. The nitrogen content of the resulting product is 1.4%.
EXAMPLE 3 The procedure of Example 1 is repeated using 55.5 grams (1.5 equivalents) of an ethylene amine mixture having a composition corresponding to that of triethylene tetramine. The resulting product has a nitrogen content of 1.9%.
EXAMPLE 4 The procedure of Example 1 is repeated using 55.0 grams (1.5 equivalents) of triethylene tetramine as the amine reactant. The resulting product has a nitrogen content of 2.9%.
EXAMPLE 5 To a mixture of 140 grams of toluene and 400 grams (0.78 equivalent) of a polyisobutenyl succinic anhydride (having an acid number of 109 and prepared from maleic anhydride and the chlorinated polyisobutylene of Example 1) there is added at room temperature 63.6 grams (1.55 equivalents) of an ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine and available from Carbide and Carbon under the trade name Polyamine H. The mix ture is heated to distill the water-toluene azeotrope and then to 150 C. at reduced pressure to remove the remaining toluene. The residual polyamide has a nitrogen content of 4.7%.
EXAMPLE 6 The procedure of Example, 1 is repeated using 46 grams (1.5 equivalents) of ethylene diamine as the amine reactant. The product which resulted has a nitrogen content of 1.5%.
EXAMPLE 7 A polyisobutenyl succinic anhydride having an acid number of 105 and an equivalent weight of 540 is prepared by the reaction of a chlorinated polyisobutylene (having an average molecular weight of 1,050 and a chlorine content of 4.3%) and maleic anhydride. To a mixture of 300 parts by weight of the polyisobutenyl succinic anhydride and 160 parts by weight of mineral oil there is added at 6595 C. an equivalent amount (25 parts by weight) of Polyamine H (identified in Example 5). This mixture then is heated to 150 C. to distill all of the water formed in the reaction. Nitrogen is bubbled through the mixture at this temperature to insure removal of the last traces of water. The residue is diluted by 79 parts by weight of mineral oil and this oil solution found to have a nitrogen content of 1.6%.
EXAMPLE 8 A mixture of 2,112 grams (3.9 equivalents) of the polyisobutenyl succinic anhydride of Example 7, 136 grams (3.9 equivalents) of diethylene triamine, and 1060 grams of mineral oil is heated at 140-150 C. for one hour. Nitrogen is bubbled through the mixture at this temperature for four more hours to aid in the removal of water. The residue is diluted with 420 grams of mineral oil and this oil solution is found to have a nitrogen content of 1.3%.
EXAMPLE 9 To a solution of 1,000 grams (1.87 equivalents) of the polyisobutenyl succinic anhydride of Example 7, in 500 grams of mineral oil there is added at 8595 C. 70 grams (1.87 equivalents) of tetraethylene pentamine. The mixture then is heated at 150165 C. for four hours, blowing with nitrogen to aid in the removal of water. The residue is diluted with 200 grams of mineral oil and the oil solution found to have a nitrogen content of 1.4%.
10 EXAMPLE 10 A polypropenyl succinic anhydride is prepared by the reaction of a chlorinated polypropylene (having a molecular weight of about 900 and a chlorine content of 4%) and maleic anhydride at 200 C. The product has an acid number of 75. To a mixture of 390 grams (0.52 equivalent) of this polypropenyl succinic anhydride, 500 grams of toluene, and 170 grams of mineral oil there is added portionwise 22 grams (0.52 equivalent) of Polyamine H. The reaction mixture is heated at reflux temperature for three hours and water removed from an azeotrope with toluene. The toluene then is removed by heating to 150 C./ 20 millimeters. The residue was found to contain 1.3% of nitrogen.
EXAMPLE 1 1 A substituted succinic anhydride is prepared by reacting maleic anhydride with a chlorinated copolymer of isobutylene and styrene. The copolymer consists of 94 parts by weight of isobutylene units and 6 parts by weight of styrene units, has an average molecular weight of 1,200, and is chlorinated to a chlorine content of 2.8% by weight. The resulting substituted succinic anhydride has an acid number of 40. To 710 grams (0.51 equivalent) of this substituted succinic anhydride and 500 grams of toluene there is added portionwise 22 grams (0.51 equivalent) of Polyamine H. The mixture is heated at reflux temperature for three hours to remove by azeotropic distillation all of the water formed in the reaction, and then at 150 C./2O millimeters to remove the toluene. The residue contains 1.1% by weight of nitrogen.
EXAMPLE 12 A substituted succinic anhydride is prepared by reacting maleic anhydride with a chlorinated copolymer of isobutylene and isoprene. The copolymer consists of 99 parts by weight of isobutylene units and 1% by weight of isoprene units. The molecular weight of the copolymer is 28,000 and the chlorine content of the chlorinated copolymer is 1.95%. The resulting alkenyl succinic anhydride had an acid number of 54. To a mixture of 228 grams (0.22 equivalent) of an oil solution of this alkenyl succinic anhydride, 58 grams of additional mineral oil, 500 grams of toluene and 9.3 grams (0.22 equivalent) of Polyamine H is heated at 120 C. for three hours, water being removed from an azeotrope with toluene. When all of the water has thus been removed the toluene is distilled by heating to C./20 millimeters. The residue is found to have a nitrogen content of 1.1%.
EXAMPLE 13 A polyisobutenyl succinic anhydride is prepared by the reaction of a chlorinated polyisobutylene with maleic anhydride. The chlorinated polyisobutylene has a chlorine content of 2% and an average molecular weight of 11,000. The polyisobutenyl succinic anhydride has an acid number of 48. A mixture of 410 grams (0.35 equivalent) of this anhydride, 15 grams (0.35 equivalent) of Polyamine H and 500 grams of toluene is heated at reflux temperature for four hours to remove water from an azeotrope with toluene. The toluene then is removed by heating to 150 C./20 millimeters. The nitrogen content of the residue is 1.3%.
EXAMPLE 14 The procedure of Example 5 is repeated except that 0.94 equivalent of Polyamine H is used instead of 1.55 equivalents. The nitrogen content of the product is 3%.
EXAMPLE 15 A polyisobutenyl-substituted succinic acid is prepared by hydrolysis of the corresponding anhydride (prepared in turn by the condensation of a chlorinated polyisobutylene and maleic anhydride). To 1152 grams (1.5 equivalents) of a 70% mineral oil solution of this polyisobutenyl succinic acid having an acid number of 62 there is added at room temperature 59.5 grams (1.5 equivalents) of Polyamine H. This mixture is heated at 150-167 C. for 7 hours during which time a total of 19.5 grams of water is distilled from the mixture. The residue is diluted with 174 grams of mineral oil and then filtered at 150 C. The filtrate has a nitrogen content of 1.6%.
EXAMPLE 16 A mixture of 1056 grams (2.0 equivalents) of the poly isobutenyl succinic anhydride of the preceding example (in which the polyisobutenyl group has a molecular weight of 850), 89 grams (2.0 equivalents) of di(1,2- propylene) triamine (having a nitrogen content of 31.3%), 370 grams of mineral oil and 100 grams of toluene is heated at reflux temperature (180-190 C.) for hours. A total of 18 grams of Water is collected from the water-toluene azeotrope. The residue is heated to 150 C./20 mm. to remove any last traces of water which might have remained. The nitrogen analysis of this residue is 1.9%.
EXAMPLE 17 A polyisobutylene having an average molecular weight of 50,000 is chlorinated to a chlorine content of by Weight. This chlorinated polyisobutylene is reacted with maleic anhydride to produce the corresponding polyisobutenyl succinic anhydride having an acid number of 24. To 6,000 grams (2.55 equivalents) of this anhydride there is added portionwise at 70105 C. 108 grams (2.55 equivalents) of Polyamine H over a period of 45 minutes. The resulting mixture is heated for four hours at 160-180 C. While nitrogen is bubbled throughout to remove water. When all of the water has been removed the product is filtered and the filtrate found to have a nitrogen content of 0.6%.
EXAMPLE 18 A mixture of 1 equivalent of a polyisobutene-substituted succinic anhydride having an acid number of 98 (prepared according to the procedure described in Example 1) and 1 equivalent of an acrolein-ammonia...
(molar ratio of 1:1) interpolymer having a nitrogen content of 23% by weight is diluted with 40% by its weight of a mineral oil. The resulting mixture is heated to 155 C. and nitrogen is bubbled through the mixture at this temperature for 5 hours. a nitrogen content of 1.35%.
EXAMPLE 19 A cyanoethyl-substituted ethylene amine is prepared by The residue is found to have V mixing 212 grams of acrylonitrile with 216 grams of an ethylene amine mixture consisting of 75% by weight of triethylene tetramine and 25% by weight of diethylene triamine at room temperature and heating the mixture at 1l0130 C. for 5 hours and then to 125 C./30 mm. To a mixture of 1110 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 825 grams of mineral oil there is added at 60 C. 143 grams dropwise of the above cyanoethyl-substituted ethylene amine (having a nitrogen content of 31.8%). The mixture is heated at 150 C.160 C. for 5 hours while being purged with nitrogen. A total of 6 cc. of water is removed by distillation. The residue has a nitrogen content of 1.66%.
EXAMPLE 20 To a mixture of 430 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 355 grams of mineral oil there is added at 60-80 C. 108 grams of N-aminopropyl morpholine throughout a period of 1 hour. The mixture is heated at 150155 C. for 5 hours until no more water distills. The residue is found to have a nitrogen content of 2.3%.
1 2 EXAMPLE 21 To a mixture of 430 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 304 grams of mineral oil there is added at 60-80 C. 33 grams of dipropylene triamine. The mixture is then heated at 150-155 C. for 5 hours until no more water distills. The residue is found to have a nitrogen content of 1.45%
EXAMPLE 22 To a mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 500 grams of mineral oil there is introduced at 150-160 C. beneath its surface a sufficient quantity of ammonia for formation of an imide Within a period of 1 hour. The mixture is diluted with 169 grams of mineral oil, heated to 150 C. and filtered. The filtrate is found to have a nitrogen content of 0.77%. 1
EXAMPLE 23 A mixture of 286 grams of polyisobutene-substituted succinic anhydride of Example 1, 96 grams of N,N-dibutyl ethylene-diamine and 252 grams of mineral oil is prepared at 60 C. and heated at l50l65 C. for 5 hours while being purged with nitrogen. The residue is found to have a nitrogen content of 2.24%.
EXAMPLE 24 A mixture of 417 grams of polyisobutene-substituted succinic anhydride of Example 1, 30 grams of N-(2- aminoethyl) trimethylene diamine and 293 grams of mineral oil is prepared at 60-80 C. and then heated at 150155 C. for 5 hours while being purged with nitrogen. The residue is found to have a nitrogen content of 1.51.
EXAMPLE 25 A mixture of 430 grams of the polyisobutene-substituted succinic anhydride of Example 1, 64 grams of 1,1- (dimethylaminoethyl)-4-methyl-piperazine and 324 grams of mineral oil is prepared at 60 C. and then heated at 150-155 C. while being blown with nitrogen. The residue is found to have a nitrogen content of 1.81%.
EXAMPLE 26 A mixture of 416 grams of polyisobutene-substituted succinic anhydride of Example 1, 124 grams of N-phenyl piperazine and 356 grams of mineral oil is prepared at 60 C. and then heated at 150-155 C. for 5 hours While being purged with nitrogen. No water is removed by such heating. The residue is found to have a nitrogen content of 2.07%.
EXAMPLE 27 A mixture of 1110 grams of polyisobutene-substituted succinic anhydride of Example 1, grams of anthranilic acid and 844 grams of mineral oil is heated at 100 C. for 2 hours. The mixture is cooled and is mixed with 72 grams of a mixture consisting of 75% by weight of triethylene tetramine and 25% by weight of diethylenetriamine at 60-80 C. The resulting mixture is heated at -455 C. for 5 hours while being purged with nitrogen. The residue is found to have a nitrogen content of 1.72%.
EXAMPLE 28 A diisobutenyl-substituted ethylene amine is prepared by reacting 590 grams of diisobutenyl chloride and 264 grams of a mixture consisting of 75 by Weight of triethylene tetramine and 20% by weight of diethylene triamine in the presence of 264 grams of potassium hydroxide (85% purity) and 2200 grams of isopropyl alcohol at 85 90 C. A mixture of 528 grams of polyisobutenesubstituted succinic anhydride of Example 1, 101 grams of the above diisobutenyl-substituted ethylene amine and 411 grams of mineral oil is heated at 150-160 C. while being purged with nitrogen until no more water distills. The residue has a nitrogen content of 1.98%.
13 EXAMPLE 29 A mixture of 45 grams of di-(polypropoxy)cocoamine having a. molecular weight of 2265, 22 grams of polyisobutene-substituted succinic anhydride of Example 1 and 44 grams of mineral oil is heated at 150-155 C. for 7 hours. The residue is found to have a nitrogen content of 0.25%.
EXAMPLE 30 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 159" grams of menthane diamine and 500 grams of mineral oil is prepared at 70-100 C. and heated at 150-190 C. While being blown with nitrogen until no Water distills. The residue is diluted with 258 grams of mineral oil and the solution is found to have a nitrogen content of 1.32.
EXAMPLE 31 A polypropylene-substituted succinic anhydride having an acid number of 84 is prepared by the reaction of a chlorinated polypropylene having a chlorine content of 3% and molecular weight of 1200 with maleic anhydride. A mixture of 813 grams of the polypropylene-substituted succinic anhydride, 50 grams of a commercial ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine and 566 grams of mineral oil is heated at 150 C. for 5 hours. The residue is found to have a nitrogen content of 1.18%.
EXAMPLE 32 A mixture of 206 grams of N,N'-disecondary-butyl p-phenylene diamine, 1000 grams of the polyisobutenesubstituted succinic anhydride of Example 1 and 500 grams of mineral oil is prepared at 85 C. and heated at 150200 C. for 9.5 hours. The mixture is diluted with 290 grams of mineral oil, heated to 160 C. and filtered. The filtrate is found to have a nitrogen content of 1.29%.
EXAMPLE 33 To 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 500 grams of mineral oil there is added 17.6 grams of hydrozine at 70-80 C. The reaction is exothermic. The mixture is heated at 140-150 C. for 1 hour whereupon 9 grams of water is collected as the distillate. To the residue there is then added grams of an ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine at 7080 C. The mixture is then heated at 150-160 C. While being purged with nitrogen until no more water is removed by distillation. The residue is diluted with 200 grams of mineral oil, heated to 160 C. and filtered. The filtrate has a nitrogen content of 1.16%.
EXAMPLE 34 To a solution of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1 in 500 grams of mineral oil there is added 28 grams of 1,1-dimethyl hydrazine at -60 C. The mixture is heated at 95 C. for 3 hours and then mixed with 40 grams of an ethylene amine mixture having an average composition corresponding to that of tetraethylene pentamine at C. The mixture is then heated at 150-185 C. for 6 hours whereupon 14 grams of water is collected as the distillate. The residue is diluted with 197 grams of mineral oil, heated to 160 C. and filtered. The filtrate has a nitrogen content of 1.53%.
EXAMPLE 35 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 333 grams of 1,2-di(3-aminopropoxy) ethane and 500 grams of mineral oil is heated at -170 C. for 5 hours whereupon 18 grams of water is collected as the distillate. The residue is diluted with 380 grams of mineral oil, heated nitrogen.
14 to 160 C. and filtered. The filtrate has a nitrogen content of 2.3%.
EXAMPLE 36 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 418 grams of di(3-arninopropoxy ethyl) ether and 500 grams of mineral oil is heated at -170 C. for 4 hours. A total of '17 grams of water is collected as the distillate. residue is diluted with 433 grams of mineral oil heated to 160 C. and filtered. The filtrate has the nitrogen content of 2.18%.
EXAMPLE 37 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 361 grams of a technical tertiary-alkyl primary amine wherein the tertiary-alkyl radical contains 12-14 carbon atoms and 500 grams of mineral oil is heatedat 250 C. for 13 hours while being purged with nitrogen. The residue is then heated to 150 C./1 m=m., diluted with 337 grams of mineral oil, heated to C. and filtered. The filtrate has a nitrogen content of 0.87%.
EXAMPLE 38 A mixture of 1000 grams of the polyisobutene-substituted succinicanhydride of Example 1, 254 grams of aminoguanidine bicarbonate and 500 grams of mineral oil is prepared at 80 C. and heated at 130165 C. for 5 hours. The residue is mixed with 223 grams of mineral oil, heated to 150 C., and filtered. The filtrate has the nitrogen content of 3.38%.
EXAMPLE 39 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 178 grams of 2 amino-pyridine and 500 grams of mineral oil is heated at 140175 C. for 10 hours while being purged with A total of 16 grams of water is collected as the distillate. The residue is diluted with 273 grams of mineral oil and filtered. The filtrate has a nitrogen content of 2.55%.
EXAMPLE 40 A mixture of 1000 grams of the polyisob'utene-substituted succinic anhydride of Example 1, 103 grams of 2,6-diamino-pyridine and 500 grams of mineral oil is heated at 140180 C. for 11 hours while being purged with nitrogen. A total of 16 grams of water is collected as the distillate. The residue is diluted with 223 grams of mineral oil, heated to 150 Crand filtered. The filtrate has a nitrogen content of 2.15%.
EXAMPLE 41 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 159 grams of cyanoguanidine and 233 grams of toluene is heated at the reflux temperature of 14 hours while 7.15 grams of water is removed by azeotropic distillation. The mixture is diluted with 740 grams of mineral oil and toluene is then removed by heating the mixture to 150 C. The residue is filtered and the filtrate has the nitrogen content of 4.74%.
EXAMPLE 42 The 1 5 EXAMPLE 43 A nitrogen-containing compound is prepared by mixing 100 grams of cyanoguanidine with 500 grams of ethylene amine mixture having an average composition corresponding to that of tetraethylene penta-mine and heating the mixture at 70-80 C. for 3 hours to obtain a homogeneous mass and filtering the mass. A mixture of 1000 grams of the polyisobutene-substituted succinic anyhdride of Example 1, 96 grams of the above filtrate and 164 grams of toluene is heated at the reflux temperature for hours. The toluene is then removed by heating the mixture to 150 C./ mm. The residue is diluted with 400 grams of mineral oil and filtered. The filtrate has a nitrogen content of 3.43%.
EXAMPLE 44 To a mixture of 544 grams of the polyisobutene-substituted succinic anhydride of Examples 1, 283 grams of mineral oil and 281 grams of toluene there is added grams of urea at C. The resulting mixture is heated at 130l35 C. for 11 hours whereupon 2.5 cc. of water is removed as the distillate. The residue is then heated to 140 C./ 20 mm. and filtered. The filtrate has a nitrogen content of 1%.
EXAMPLE 45 A mixture of 1088 grams of the polyisobutene-substituted succinic anhydride of Example 1, 106 grams of dipropylene triamine, 500 grams of toluene is heated at the reflux temperature for 4 hours until no more water distills. The residue is then heated to 150 C./20 mm. and diluted with 392 grams of mineral oil. The oil solution is found to have a nitrogen content of 1.74%.
EXAMPLE 46 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 174 grams of tphenylbiguanide and 270 grams of toluene is heated at the reflux temperature for 6.5 hours whereupon 25 grams of water is removed by distillation. The residue is diluted with 500 grams of mineral oil and heated to 160 C./20 mm. to distill off toluene. The residue is diluted further with 265 grams of mineral oil, heated to 150 C. and filtered. The filtrate has a nitrogen content of 3.4%.
EXAMPLE 47 A mixture of 920 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 249 grams of bis-(dimethylaminopropyl) amine is heated at reflux temperature until no more water distills. The residue has a nitrogen content of 4%.
EXAMPLE 48 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, 363 grams of aminopropyl octadecylamine and 1314 grams of mineral oil is heated at 200 C. for 24 hours. The residue is filtered. The filtrate has a nitrogen content of 1.02%.
EXAMPLE 49 A mixture of 1000 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 258 grams of di-n-butyla-mine is heated at 185 C. for 12 hours and then to 200 C./25 mm. The residue is diluted with 1157 grams of mineral oil and filtered. The filtrate has a nitrogen content of 0.8%.
EXAMPLE 50 A mixture of 297 grams of thepolyisobutene-substituted succinic anhydride of Example 1, 25 grams of melamine and 200 grams of mineral oil is heated at 190260 C. for 9 hours and then at 290-295 C. for 7 more hours. The residue is mixed with 50 grams of Water, heated at reflux for 7 hours, dried and filtered. The filtrate has a nitrogen content of 2%.
1 0 EXAMPLE 51 A mixture of 100 grams of the polyisobutene-substituted anhydride of Example 1 and 67 grams of mineral oil is heated to 50 C. To this mixture there is added 59 grams of an aqueous solution of hydrazine hydrate. The mixture is heated at -110 C. for 1.25 hours, diluted with toluene, and heated at 107 C. until no more water distills. Toluene is removed by distillation. The residue has a nitrogen content of 0.8%.
EXAMPLE 5 2 A mixture of 1.0 equivalent of a mono-carboxylic acid (prepared by chlorinating a polyisobutene having a molecular weight of 750 to a product having a chlorine content of 3.6% by weight, converting the product to the corresponding nitrile by reaction with an equivalent amount of potassium cyanide in the presence of a catalytic amount of cuprous cyanide and hydrolyzing the resulting nitrile by treatment with 50% excess of a dilute aqueous sulfuric acid at the reflux temperature) and 0.5 equivalent of ethylene diamine is mixed with twice its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by distillation. The mixture is heated further and the xylene is removed by distillation under reduced pressure. The residue is the acylated nitrogen compound.
EXAMPLE 5 3 A methyl ester of a high molecular weight monocarboxylic acid is prepared by heating an equi-molar mixture of a chlorinated polyisobutene having a molecular weight of 1000 and a chlorine content of 4.7% by weight and methyl methacrylate at -20 C. The resulting ester is then heated with a stoichiometrically equivalent amount of triethylene tetramine at 100-200 C. to produce an acylated nitrogen compound of this invention.
EXAMPLE 54 A dimethyl Wax-substituted malonate is prepared by reacting dimethyl malonate with sodium ethoxide to form a sodium derivative of the ester, heating the sodium derivative with a brominated wax having 75 carbon atoms and 1 bromine atom per molecule. A mixture of 1.0 equivalent of the ester of 1.0 equivalent of N,N-dibutyl thiourea is dissolved in five times its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by azeotropic distillation. The mixture is heated further and the xylene is removed by distillation. The residue is the acylated nitrogen compound.
EXAMPLE 55 A high molecular weight mono-carboxylic acid is prepared by telomerizing ethylene with carbon tetrachloride to a telomer having an average of 35 ethylene radicals per molecule and hydrolyzing the telomer to the corresponding acid in accordance with the procedure described in British Patent No. 581,899. A mixture of 1.5 equivalent of the acid and 0.75 equivalent of amino-propyl octylamine is mixed with twice its volume of a mineral oil and twice its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by azeotropic distillation. Xylene is then removed by distillation under reduced pressure and the residue is filtered.
EXAMPLE 56 A mixture of 2000 grams of mineral oil, 3 equivalents of trimethylene diamine and 3 equivalents of a high molecular weight tricarboxylic acid prepared by the reaction of a brominated poly (l-hexene) having a molecular weight of 2000 and a bromine content of 4% by weight of 2-pentene-1,3,5-tricarboxylic acid (prepared by dehydration of citric acid) is heated at C. for 20 hours. The residue is filtered to give a homogeneous mineral oil solution of the acylated nitrogen product.
water distills.
17 EXAMPLE 57 An equi-molar mixture of 2-aminoethyl morpholine and a mono-carboxylic acid (prepared by the reaction of ketene with a brominated poly l-octene) having a molecular weight of 1500 and one atom of bromine per molecule) is diluted with three times its volume of xylene. The resulting mixture is heated at the reflux temperature until no more water is removed by distillation. The residue is a xylene solution of the acylated nitrogen compound.
EXAMPLE 58 A mixture of 1 equivalent of menthane diamine and 1 equivalent of a high molecular glutaric acid-ester (prepared by the reaction of silver with an equi-molar mixture of betaiodopropanoic acid and alpha-iodo derivative of the methyl ester of the mono-carboxylic acid of the preceding example) is diluted with an equal weight of a mineral oil and the resulting solution is heated at 180 C. until no more water distills. The residue is then filtered.
EXAMPLE 59 A high molecular weight dicarboxylic acid is prepared by reacting two moles of the omega-bro'mo derivative of the hexapenta contanoic acid of the preceding example with one mole of zinc. The dicarboxylic acid is then treated with 2 equivalents of ethylene diamine to produce a diamide.
EXAMPLE 61 A mixture of 1 equivalent of 1-aminoethyl-2-octadecylimidazoline with 1 equivalent of the high molecular weight mono-carboxylic acid of Example 55 is mixed with twice its volume of diphenyl oxide. The resulting mixture is heated at the reflux temperature until no more The residue is then filtered.
EXAMPLE 62 A product is obtained by the procedure described in the preceding example except that N.N-di-n-butyl-pphenylenediamine (1 equivalent) is used in lieu of the imidazoline used.
EXAMPLE 63 To a solution of 1 equivalent of di-methyl ester of a polyethylene (molecular weight of 1500)-substituted malonic acid in 5000 grams of xylene, there is added 1 mole of melamine at 60 C. The resulting mixture is heated at the reflux temperature for 25 hours. The residue is mixed with 2000 grams of mineral oil and xylene is removed by heating the oil solution to 180 C/2 EXAMPLE 64 A product is obtained by the procedure of Example 1, except that pyrrolydine (1 equivalent) is used in lieu of the ethylene diamine used.
EXAMPLE 65 A product is obtained by the procedure of Example 1, except that hexahydro-1,3,5-triazine (1 equivalent) is used in lieu of the ethylene diamine used.
18 EXAMPLE 66 A product is obtained by the procedure of Example 1, except that 1,3,4-dithiazolidine (1 equivalent) is used in lieu of the ethylene diamine used.
EXAMPLE 67 A product is obtained by the procedure of Example 1, except that hexamethylene tetramine (2 equivalents) is used in lieu of the ethylene diamine used.
EXAMPLE 68 A product is obtained by the procedure of Example 1, except that tripentylene tetramine (3 equivalents) is used in lieu of the ethylene diamine used,
EXAMPLE 69 An equi-molar mixture of the polyisobutene-substituted succinic anhydride of Example 1 and N-octyl thiourea is diluted with an equal volume of xylene. The resulting mixture is heated at the reflux temperature for 30 hours. The residue is a xylene solution of the product.
EXAMPLE 70 A product is obtained by the procedure of Example 69 except that oleylamide is used in lieu of the thiourea used.
EXAMPLE 71 A product is obtained by the procedure of Example 69 except that 1,3-diphenyl guanidine is used in lieu of the thiourea used.
EXAMPLE 72 A product is obtained by the procedure of Example 69 except that octadecamidine is used in lieu of the thiourea used.
EXAMPLE 73 A product is obtained by the procedure of Example 69 except that guanylurea is used in lieu of the thiourea used.
EXAMPLE 74 To a mixture of 396 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 282 grams of mineral oil there was added 34 grams of N-methyltrimethylene diamine at 60 C. within a period of one hour. The mixture was blown with nitrogen at C. for 5 hours. The residue was found to have a nitrogen content of 1.41%
EXAMPLE 75 A mixture of 308 grams of mineral oil, 400 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 70 grams of N-(2-ethylhexyl)-trimethylene diamine was prepared at 60 C. The mixture was heated to 250 C. and was then blown with nitrogen at 150- 155 C. for 5 hours. The residue had a nitrogen content of 1.4%.
EXAMPLE 76 A mixture of 386 grams of mineral oil, 528 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 59 grams of N-(2-hydroxyethyl)-trimethylenediamine was prepared at 60 C. The mixture was blown with nitrogen at 150-155 C. for 5 hours. The residue had a nitrogen content of 1.56%.
EXAMPLE 77 A mixture of 185 grams of mineral oil, 330 grams of the polyisobutene-substituted succinic anhydride of Example 1, and 88.5 grams of 1,4-bis(2-hydroxypropyl) 2-methyl piperazine was prepared at 60 C. The mixture was heated at 180276 C./40 mm. for 14.5 hours. The residue had a nitrogen content of 1.12%.
19 EXAMPLE 7:;
To a mixture of 314 grams of mineral oil and 430 grams of the polyisobutene-substituted succinic anhydride of Example 1 there was added at 60 C. 49 grams of 1- (2-hydroxyethyl)piperazine. The mixture was heated to 150 C. and blown with nitrogen at this temperature for 5 hours. The residue had a nitrogen content of 1.38%.
EXAMPLE 79 A mixture of 382 grams of mineral oil, 528 grams of the polyisobut-ene-substituted succinic anhydride of Example 1, and 53 grams of 1-methyl-4-'(3-aminopropyl)- piperazine was prepared at 60 C., heated to 150 C., and blown with nitrogen at 150-155 C. for 5 hours. The residue had a nitrogen content of 1.57%.
EXAMPLE 80 To a mixture of 800 grams of the polyisobutene-substituted succinic anhydride of Example 1 and 175 grams of toluene there Was added 77 grams of a commercial mixture of alkylene amines and hydroxy alkyl-substituted alkylene amines consisting of approximately 2% (by weight) of diethylene triamine, 36% of 1-(2-aminoethyDpiperazine, 11% of 1-(2-hydroxyethyl)piperazine, 11% of N-(Z-hydroxyethyl)ethylenediamine, and 40% of higher homologues obtained as a result of condensation of the above-indicated amine components. The resulting mixture was heated at the reflux temperature for 16.5 hours whereupon 12 cc. of water was collected as the distillate. The residue was then heated to 160 C./25 mm. and diluted with 570 grams of mineral oil. The final product was found to have a nitrogen content of 1.57%.
EXAMPLE 81 A product is obtained by the procedure of Example 69 except that an equimolar mixture of ammonia and bis- (2-hydroxyethyl)amine is used in lieu of the thiourea used.
EXAMPLE 82 A product is obtained by the procedure of Example 69 except that an equimolar mixture of benzidine is used in lieu of the thiourea used.
EXAMPLE 83 An alkenyl succinic anhydride in which the alkenyl group has less than 50 carbon atoms is prepared from a polyisobutylene having an average molecular weight of 375. This polymer is chlorinated to a chlorine content of 9.7% and then reacted with maleic anhydride. The resulting polyisobutenyl succinic anhydride has an acid number of 190 and an equivalent weight of 300. The procedure of Example is followed using 1.0 equivalent of this polyisobutenyl succinic anhydride and 1.0 equivalent of Polyamine H. The resulting product then is diluted with mineral oil to a 58% solution therein; the nitrogen content is 3.2%
EXAMPLE 84 Another alkenyl succinic anhydride in which the alkenyl group has less than 50 carbons is prepared by alkylation of maleic anhydride with tetrapropylene. Equivalent amounts of this tetra-propenyl succinic anhydride and triethylene tetramine in toluene are heated at reflux temperature until substantially all of the water is removed. The toluene then is removed by heating at 155 C. under reduced pressure and the residue is dissolved in chlorine oil to a 60% solution. This oil solution is found to have a nitrogen content of 4.8%.
EXAMPLE 85 A polyisobutene having an average molecular weight of 520 (corresponding to 37 carbon atoms) is chlorinated to a chlorine content of 6.25% and then is made to react with an equivalent amount of maleic anhydride to yield a polyisobutene-substituted succinic anhydride having a saponification of 152. To 552 grams (1.5 equivalents) of this anhydride dissolved in 276 grams of mineral oil there is added at 60 C. 63 grams (1.5 equivalents) of Polyamine H portionwise over a period of 1 hour. The resulting mixture is heated for 6 hours at 150 C. and then blown with nitrogen at this temperature for 1 hour. The residue is diluted with grams of mineral oil and the final oil solution is found to have a nitrogen content of 2.1%.
As indicated previously the acylated nitrogen-containing composition is usually present in lubricating oils in amounts ranging from about 0.1% to about 10% by Weight. The optimum amounts for a particular application depend to a large measure upon the type of surface to which the lubricating composition is to be subjected. Thus, for example, lubricating compositions for use in gasoline internal combustion engines may contain from about 0.5 to about 5% of an acylated nitrogen-containing composition, whereas lubricating compositions for use in gears and diesel engines may contain as much as 10% or even more of the additive.
This invention contemplates also the presence of other additives in the lubricating compositions. Such additives include, for example, detergents of the ash-containing type, viscosity index improving agents, pour point depressing agents, anti-form agents, extreme pressure agents, rustinhibiting agents, and oxidation and corrosion inhibiting agents.
The ash-containing detergents are exemplified by oilsoluble neutral and basic salts of alkali or alkaline earth metals with sulfonic acids, carboxylic acids, or organic phosphorus acids characterized by at least one direct carbon-to-phosphorus linkage such as those prepared by the treatment of an olefin polymer '(e.g., polyisobutene having a molecular weight of 1000) with a phosphorizing agent such as phosphorus trichloride, phosphorus heptasulfide, phosphorus pentasulfide, phosphorus trichloride and sulfur, *W-hite phosphorus and a sulfur halide, or phosphorothioic chloride. The most commonly used salts of such acids are those of sodium, potassium, lithium, calcium, magnesium, strontium, and barium.
The term basic salt is used to designate the metal salts wherein the metal is present in stoichiometrically larger amounts than the organic acid radical. The com monly employed methods for preparing the basic salts involves heating a mineral oil solution of an acid with a stoichiometric excess of a metal neutralizing agent such as the metal oxide, hydroxide, carbonate, bicarbonate, or sulfide at a temperature above 50 C. and filtering the resulting mass. The use of a promoter in the neutralization step to aid the incorporation of a large excess of metal likewise is known. Examples of compounds useful as the promoter include phenolic substances such as phenol, naphthol, alkylphenol, thiophenol, sulfurized alkylphenol, and condensation products of formaldehyde with a phenolic substance; alcohols such as methanol, 2-propanol, octyl alcohol, cellosolve, carbitol, ethylene glycol, stearyl alcohol, and cyclohexyl alcohol; amines such as aniline, phenylenediamine, phenothiazine, phenyl-betanaphthylamine, and dodecylamine. A particularly effective method for preparing the basic salts comprises mixing an acid with an excess of a basic alkaline earth metal neutralizing agent, a phenolic promoter compound, and a small amount of Water and carbonating the mixture at an elevated temperature such as 60200 C.
Extreme pressure agents and corrosion-inhibiting and oxidation-inhibiting agents are exemplified by chlorinated aliphatic hydrocarbons such as chlorinated wax; organic, sulfides and polysulfides such as benzyl disulfide, bis (chlorobenzyl) disulfide, dibutyl tetrasulfide, sulfurized sperm oil, sulfurized methyl ester of oleic acid, sulfurized alkylphenol, sulfurized dipentene, and sulfurized terpene, phosphosulfurized hydrocarbons such as the reaction product of a phosphorus sulfide with turpentine or methyl oleate; phosphorous esters including principally dihydrocarbon and trihydrocarbon phosphites such as dibutyl phosphite, diheptyl phosphite, dicyclohexyl phosphite, pentyl phenyl phosphite, dipentyl phenyl phosphite, tridecyl phosphite, distearyl phosphite, dimethyl naphthyl phosphite, oleyl 4-pentylphenyl phosphite, polypropylene (molecular weight 500)-substituted phenyl phosphite, diisobutyl substituted phenyl phosphite; metal thiocarbamates such as zinc dioctyl-dithiocarbamate, and barium heptylphenyl dithiocarbamate: Group II metal phosphorodithioates such as zinc dicyclohexylphosphorodithioate, zinc dioctylphosphorodi-thioate, barium di(heptylphenyl)- phosphorodithioate, cadmium dinonylphosphorodithioate, and zinc salt of a phosphorodithioic acid produced by the reaction of phosphorus pentasulfide with an equirnolar mixture of isopropyl alcohol and n-hexyl alcohol.
The lubricating compositions may also contain metal detergent additives in amounts usually Within the range of about 0.1% to about 20% by weight. In some applications such as in lubricating marine diesel engines the lubricating compositions may contain as much as 30% of a metal detergent additive. They may also contain extreme pressure addition agents, viscosity index improving agents, and pour point depressing agents, each in amounts within the range of from about 0.1% to about 10%.
The following examples are illustrative of the lubricating compositions of this invention (all percentages are by weight):
EXAMPLE A SAE 20 mineral lubricating oil containing 0.5% of the product of Example 1.
EXAMPLE B SAE 30 mineral lubricating oil containing 0.75% of the product of Example 2 and 0.1% of phorphorus as the barium salt of di-n-nonylphosphorodithioic acid.
EXAMPLE C SAE 10W-30 mineral lubricating oil containing 0.4% of the product of Example 7.
EXAMPLE D SAE 90 mineral lurbicating oil containing 0.1% of the product of Example 7 and 0.15% of the zinc salt of an equimolar mixture of di-cyclohexylphosphorodithioic acid and di-disobutyl phosphorodithioic acid.
EXAMPLE E SAE 30 mineral lubricating oil containing 2% of the product of Example 3.
EXAMPLE F SAE 20W-30 mineral lubricating oil containing of the product of Example 14.
EXAMPLE G SAE 10W-30 mineral lubricating oil containing 1.5% of the product of Example 25 and 0.05% of phosphorus as the zinc salt of a phosphorodithioic acid prepared by the reaction of phosphorus pentasulfide with a mixture of 60% (mole) of p-butylphenol and 40% (mole) of npentyl alcohol.
EXAMPLE H SAE 50 mineral lubricating oil containing 3% of the product of Example 36 and 0.1% of phosphorus as the calcium salt of di-hexylphosphorodithioate.
EXAMPLE I SAE 10W30 mineral lubricating oil containing 2% of the product of Example 48, 0.06% of phosphorus as zinc di-n-octylphosphorodithioate, and 1% of sulfate ash as barium mahogany sulfonate.
EXAMPLE I SAE 30 mineral lubricating oil containing 5% of the product of Example 59, 0.1% of phosphorus as the zinc EXAMPLE K SAE 10W-30 mineral lubricating oil containing 6% of the product of Example 60, 0.075 of phosphorus as zinc di-n-octylphosphorodithi-oate, and 5% of the barium salt of an acidic composition prepared by the reaction of 1000 parts of a polyisobutene having a molecular weight of 60,000 with parts of phosphorus pentasulfide at 200 C. and hydrolyzing the product with steam at C.
EXAMPLE L SAE 10 mineral lubricating oil containing 2% of the product of Example 74, 0.075% of phosphorus as the adduct of zinc di-cyclohexylphosphorodithioate treated with 0.3 mole of ethylene oxide, 2% of sulfurized sperm oil having a sulfur content of 10%, 3.5% of a poly-(alkyl methacrylate) viscosity index improver, 0.02% of a poly- (alkyl methacrylate) pour point depressant, 0.003% of a poly-(alkyl siloxane) anti-foam agent.
EXAMPLE M SAE 10 mineral lubricating oil containing 1.5% of the product of Example 51, 0.075% of phosphorus as the adduct obtained by heating zinc di-nonylphosphorodithioate with 0.25 mole of 1,2-hexene oxide at 120 C., a sulfurized methyl ester of tall oil acid having a sulfur content of 15%, 6% of a polybutene viscosity index improver, 0.005% of a poly-(alkyl methacrylate) antifoam agent, and 0.5 of lard oil.
EXAMPLE N SAE 20 mineral lubricating oil containing 1.5% of the product of Example 13, 0.5% of di-dodecyl phosphite, 2% of the sulfurized sperm oil having a sulfur content of 9%, a basic calcium detergent prepared by carbonating a mixture comprising mineral oil, calcium mahogany sulfonate and 6 moles of calcium hydroxide in the presence of an equi-molar mixture (10% of the mixture) of methyl alcohol and n-butyl alcohol as the promoter at the reflux temperature.
EXAMPLE 0 SAE 10 mineral lubricating oil containing 2% of the product of Example 7, 0.07% of phosphorus as zinc dioctylphosphorodithioate, 2% of a barium detergent prepared by neutralizing With barium hydroxide the hydrolyzed reaction product of a polypropylene (molecular weight 2000) with 1 mole of phosphorus pentasulfide and 1 mole of sulfur, 3% of a barium sulfonate detergent prepared by carbonating a mineral oil solution of mahogany acid, and a 500% stoichiometrically excess amount of barium hydroxide in the presence of phenol as the promoter at 180 C., 3% of a supplemental ashless detergent prepared by copolymerizing a mixture of 95% (weight) of decyl-methacrylate and 5% (Weight) of diethylaminoethylacrylate.
EXAMPLE P SAE 80 mineral lubricating oil containing 2% of the product of Example 7, 0.1% of phosphorus as zinc di-n hexylphosphoroditihoate, 10% of a chlorinated paraffin Wax having a chlorine content of 40%, 2% of di-butyl tetrasulfide, 2% of sulfurized dipentene, 0.2% of oleyl amide, 0.003% of an anti-foam agent, 0.02% of a pour point depressant, and 3% of a viscosity index improver.
EXAMPLE Q SAE 10 mineral lubricating oil containing 3% of the product of Example 16, 0.075% of phosphorus as the 23 zinc salt of a phosphorodithioic acid prepared by the reaction of phosphorus pentasulfide with an equimolar mixture of n-butyl alcohol and dodecyl alcohol, 3% of a barium detergent prepared by carbonating a mineral oil solution containing 1 mole of perm oil, 0.6 mole of octylphenol, 2 moles of barium oxide, and a small amount of water at 150 C.
EXAMPLE R SAE 20 mineral lubricaitng oil containing 2% of the product of Example 17 and 0.07% of phosphorus as zinc di-n-octylphosphorodithioate.
EXAMPLE S SAE 30 mineral lubricating oil containing 3% of the product of Example 48 and 0.1% of phosphorus as zinc di- (isobutylphenyl -phosphorodithioate.
EXAMPLE T SAE 50 mineral lubricating oil containing 2% of the product of Example 39.
EXAMPLE U SAE 90 mineral lubricating oil containing 3% of the product of Example 20 and 0.2% of phosphorus as the reaction product of 4 moles of turpentine with 1 mole of phosphorus pentasulfide.
The above lubricants are merely illustrative and the scope of invention includes the use of all of the additives previously illustrated as Well as others within the broad concept of this invention described herein.
The utility of the dispersant additives of this invention is shown by the results of an evaluation of the crankcase lubricants used in taxicabs which had been operated for over 50,000 miles each. In this test ten 6-cylinder 1958 Chevrolet cars (with no oil filters) were operated as a fleet of taxicabs. In each case the crankcase lubricant was a solvent refined Mid-Continent petroleum oil having a viscosity of 185 SUS/ 100 F. and a viscosity index of 112, and containing 5.9% by volume of a poly-alkylmethacrylate viscosity index irn-provcr and 0.59% by volume of a zinc dialkyl phosphorodithioate (the alkyl groups being isobutyl and a mixture of primary amyl). crankcase oil drains were taken from each car at oilchange intervals of about 3,000 miles of service and these drains combined. A 30-cc. sample of each of the combined drains was mixed with 1% by weight of the dispersant additive to he tested and 2% by weight of water. This mixture then was homogenized, placed in a 100-cc. graduated cone-shaped centrifuge tube and centrifuged for two hours at 1500 rpm. The various dispersants were evaluated by noting the volume of deposited sediment in terms of cubic centimeters and also the turbidity of the supernatant oil layer. It is apparent that the more efiective dispersants will give test results which show a minimum of deposited sediment and a relatively hazy supernatant oil layer.
The clarity of the supernatant oil layer was determined by the amount of light transmitted through it from a 3- volt, 0.75 Watt incandescent bulb.
The dispersant properties of the compositions of this invention may be illustrated also by the results of an oxidation-dispersancy test which is useful as a screening test for determining the effectiveness of the dispersant additive under light-duty service conditions. In this test a 350-00. sample of a lubricating oil containing the dispersant additive is placed in a 2" x 15" borosilicate tube. A 1%" x 5% SAE 1020 steel panel is immersed in the oil. The sample then is heated at 300 F. for 48 hours while air is bubbled through the oil at the rate of 10 liters per hour. The oxidized sample is cooled to 120 F., homogenized, allowed to stand at room temperature for 24 hours and then filtered through two layers of No. 1 Whatman filter paper at 20 mm. Hg pressure. The weight of the precipitate, washed with naphtha and dried, is taken as a measure of the eifectiveness of the dispersant additive, i.e., the greater this weight of precipitate the less effective the dispersant.
Two modifications of the above procedure may be employed; both make the test more severe: one consists of extending the test from 48 hours to 96 hours, and the other involves adding 0.5% of water, based on the weight of the test sample, to the oxidized oil before homogenization.
The lubricating oil employed in this test (Table II) was a Mid-Continent conventionally refined petroleum oil having a viscosity of about 200 SUS/ 100 F., and containing 0.001% by weight of iron naphthenate (to promote oxidation).
Table II Oxidation-Dispersauce Additive Tested (1.5% by weight of Test Result, mg. of diluent-free chemical) deposit/100 ml. of oil tested None. 144
Do 275 (b) Do 1,000 (a, b) Prior art product of Example 83- 738 Prior art product of Example 84- 1, 060 (b) Prior art product of Example 85 970 (b) Product of Example 1 0.7 (b) Product of Example 2. 0. 7 (b) Product of Example 3. 1. 0 (b) Product of Example 4 1. 2 (b) Product of Example 5. 1. 5 (b) Product of Example 6. 0. 7 (b) Product of Example 9. 0.5 (b) Product of Example 10 3. 2 (b) Product of Example 11 10. 2 (b) Product of Example 12--. 19. 5 (b) Product of Example 13--. 2. 7 (b) Product of Example 14 0.3
Do 1. 2 (b) 1. 7 (a, b) Product of Example 15 1. 3 (b) Product of Example 16--- 0.9 (b) Product of Example 38..- 0. 1 (b) 0.2 (a, b) Product of Example 41 0.8 (b) Do- 1.0 (a, b) Product of Example 0.7 (b) Do 0.8 (a, b) Product of Example 35 9.1 (b Product of Example 47 0.1 Product of Example 44 17 Product of Example 49 1. 5 (b) Modification (a): 96 hours testing.
Modification (b): 0.5% of water used in the test.
Further illustration of the usefulness of the products of this invention as dispersants in motor oils was gained from a. modified version* of the CRC-EX-S Engine Test. This test is recognized in the field as an important test by which lubricants can be evaluated for use under light duty service conditions. In this particular test the lubricant is used in the crankcase of a 1954 6- cylinder Chevrolet Powerglide engine for 144 hours under recurring cycling conditions, each cycle consisting of:
2 hours at an engine speed of 500125 r.p.m. under zero load at an oil sump temperature of 100-125 F.; airfuel ratio of 10:1;
*Ordlnarily this test lasts for 96 hours.
2 hours at an engine speed of 2500i25 r.p.m. under a load of 40 brake-horsepower at an oil sump temperature of 160-170 F.; air-fuel ratio of 16:1;
2 hours at an engine speed of 2500125 r.p.m. under a load of 40 brake-horsepower at an oil sump temperature of 240-250 F.; air-fuel ratio of 16:1.
After completion of the test, the engine is dismantled and various parts of the engine are examined for engine deposits. The lubricant dispersant addition agent is then rated according to (1) the extent of piston ring-filling, (2) the amount of sludge formed in the engine (on a scale of 80-0, 80 being indicative of no sludge and being indicative of extremely heavy sludge), and (3) the total amount of engine deposits, i.e., sludge and varnish, formed in the engine (on a scale of 100-0, 100 being indicative of no deposits and 0 being indicative of extremely heavy deposits). The results are summarized in What is claimed is:
1. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic-acid-producing compound selected from the class consisting of acids, anhydrides, esters and halides having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equivalent of said succinic-acid-producing compound, of an amine, other than an ethylene polyamine, having at least one hydrogen radical attached to the nitrogen radical.
2. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinicacid-producing compound selected from the class consisting of acids, anhydrides, esters and halides having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equivalent of said succinic-acid-producing compound, of a nitrogen-containing compound, other than an ethylene polyamine, having the formula wherein R and R are selected from the group consisting of hydrogen, hydrocarbon, amino-substituted hydrocarbon other than an ethylene polyamine, hydroxy-substituted hydrocarbon, alkoxy-substituted hydrocarbon, amino, carbamyl, thiocarbamyl, thiocarbamyl and guanyl radicals.
3. An oil soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular Weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles per equivalent of said succinic anhydride, of dicyandiamide.
4. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within 26 the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of a hydroxyalkyl alkylene polyamine having up to about 8 carbon atoms in the alkylene group.
5. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of hydroxyethyl piperazine.
6. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of an aminohydrocarbon amine.
7. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of a polyalkylene polyamine having at least three methylene groups in the alkylene radicals.
8. An oil-soluble acylated nitrogen composition pre pared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of di(trimethylene) triamine.
9. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of an alkylamine.
10. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic anhydride, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of dodecylamine.
11. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic-acid-producing compound selected from the class consisting of esters and halides and having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equlvalent of said succinic-acid-producing compound, of an ethylene polyamine.
12. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a polyisobutene-substituted succinic-acid-producing compound selected from the class consisting of esters and halides, the polyisobutene substituent having a molecular weight within the range of from about 700 to about 5000, with from about one-half equivalent to about two moles,
per equivalent of said succinic-acid-producing compound, of a polyethylene polyamine having from two to six amino groups.
13. An oil-soluble acylated nitrogen composition as in claim 2 wherein R and R are aliphatic radicals.
14. An oil-soluble acylated nitrogen composition as in claim 2 wherein the nitrogen-containing compound is an aliphatic polyamine.
15. An oil-soluble acylated nitrogen composition as in claim 2 wherein the nitrogen-containing compound is an aliphatic hydrocarbon polyamine.
16. An oil-soluble acylated nitrogen composition as in claim 2 wherein the nitrogen-containing compound is ammonia.
17. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic anhydride having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, With from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of ammonia.
18. An oil-soluble acylated nitrogen composition as in claim 17 wherein the hydrocarbon substituent has a molecular weight Within the range of about 700 to about 5000.
19. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of about 80 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic anhydride having at least about 50 aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles per equivalent of said succinic anhydride, of dicyandiamide.
20. An oil-soluble acylated nitrogen composition prepared by the process comprising reacting at a temperature within the range of from about 30 C. to about 250 C. a substantially saturated hydrocarbon-substituted succinic 28 anhydride having at least about aliphatic carbon atoms in the hydrocarbon substituent, with from about one-half equivalent to about two moles, per equivalent of said succinic anhydride, of hydroxyethyl piperazine.
21. A composition comprising an oil-soluble acylated nitrogen compound characterized by the presence within its structure of (A) a substantially saturated hydrocarbonsubstituted polar group containing a radical selected from the class consisting of succinoyl, succinimidoyl and succinoyloxy radicals wherein said substantially saturated hydrocarbon substituent contains at least about 50 aliphatic carbon atoms, and (B) a nitrogen-containing group characterized by a nitrogen atom attached directly to said polar group, said acylated nitrogen compound excluding the product of a process which requires the reaction of a substantially hydrocarbon substituted succinic acid or anhydride with an ethylene polyamine.
22. A composition comprising an oil-soluble acylated nitrogen compound as in claim 21 wherein the nitrogencontaining group of (B) is an aliphatic amine.
References Cited by the Examiner UNITED STATES PATENTS 2,638,450 5/1953 White et al.
3,004,987 10/1961 Paris et al. 2603263 3,017,416 1/1962 Lo et al. 260326.5
3,018,250 1/1962 Anderson et al. 252-5l.5
3,018,291 1/1962 Anderson et al. 25251.5 X
3,024,195 3/1962 Drummond et al. 252--51.5 3,024,237 3/1962 Drummond et al. 260268 3,029,250 4/1962 Gaertner 260326.5
NICHOLAS S. RIZZO, Primary Examiner.
JULIUS GREENWALD, WALTER A. MODANCE,
Examiners.
PATRICK C. BAKER, JOSE TOVAR, JAMES W.
ADAMS, Assistant Examiners.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,219,666 November 23, 1965 George R. Norman et a1.
It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.
Column 25, line 58, strike out "other than an ethylene polyamine"; line 60, strike out "thiocarbamyl," column 26, line 22, after "amine" insert other than an ethylene polyamine Signed and sealed this 20th day of September 1966.
(SEAL) Attest:
ERNEST W. SWmER Attesting Officer EDWARD J. BRENNER Commissioner of Patents

Claims (1)

  1. 5. AN OIL-SOLUBLE ACYLATED NITROGEN COMPOSITION PREPARED BY THE PROCESS COMPRISING REACTING AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 80*C. TO ABOUT 250*C. A POLYISOBUTENE-SUBSTITUTED SUCCINIC ANHYDRIDE, THE POLYISOBUTENE SUBSTITUENT HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF FROM ABOUT 700 TO 5000, WITH FROM ABOUT ONE-HALF EQUIVALENT TO ABOUT TWO MOLES, PER EQUIVALENT OF SAID SUCCINIC ANHYDRIDE, OF HYDROXYETHYL PEPERAZINE.
US12680961 1959-03-30 1961-07-21 Derivatives of succinic acids and nitrogen compounds Expired - Lifetime US3219666A (en)

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DENDAT1248643D DE1248643B (en) 1959-03-30 Process for the preparation of oil-soluble aylated amines
US80266759 US3172892A (en) 1959-03-30 1959-03-30 Reaction product of high molecular weight succinic acids and succinic anhydrides with an ethylene poly- amine
GB43717/59A GB922831A (en) 1959-03-30 1959-12-23 Metal-free lubricant additives
DE19601794292D DE1794292B1 (en) 1959-03-30 1960-01-07 Mineral lubricant based lubricants
US12680961 US3219666A (en) 1959-03-30 1961-07-21 Derivatives of succinic acids and nitrogen compounds
US348760A US3278550A (en) 1959-03-30 1964-03-02 Reaction products of a hydrocarbonsubstituted succinic acid-producing compound, an amine and an alkenyl cyanide
NL6502540A NL6502540A (en) 1959-03-30 1965-03-01
FR7499A FR1432851A (en) 1959-03-30 1965-03-01 Substituted polyamines and their manufacturing process
DE1965L0050105 DE1570871A1 (en) 1959-03-30 1965-03-02 Process for the production of nitrogenous compositions which can be used as additives in hydrocarbon oils
US468948A US3341542A (en) 1959-03-30 1965-07-01 Oil soluble acrylated nitrogen compounds having a polar acyl, acylimidoyl or acyloxy group with a nitrogen atom attached directly thereto
US608219A US3366569A (en) 1959-03-30 1967-01-09 Lubricating compositions containing the reaction product of a substituted succinic acid-producing compound, an amino compound, and an alkenyl cyanide
US610769A US3444170A (en) 1959-03-30 1967-01-23 Process which comprises reacting a carboxylic intermediate with an amine

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US80266759 US3172892A (en) 1959-03-30 1959-03-30 Reaction product of high molecular weight succinic acids and succinic anhydrides with an ethylene poly- amine
US12680961 US3219666A (en) 1959-03-30 1961-07-21 Derivatives of succinic acids and nitrogen compounds
US348760A US3278550A (en) 1959-03-30 1964-03-02 Reaction products of a hydrocarbonsubstituted succinic acid-producing compound, an amine and an alkenyl cyanide
US40261764A 1964-10-08 1964-10-08
US468948A US3341542A (en) 1959-03-30 1965-07-01 Oil soluble acrylated nitrogen compounds having a polar acyl, acylimidoyl or acyloxy group with a nitrogen atom attached directly thereto

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US348760A Expired - Lifetime US3278550A (en) 1959-03-30 1964-03-02 Reaction products of a hydrocarbonsubstituted succinic acid-producing compound, an amine and an alkenyl cyanide
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FR1432851A (en) 1966-03-25
DE1570871A1 (en) 1970-02-26
US3172892A (en) 1965-03-09
DE1248643B (en) 1967-08-31
NL6502540A (en) 1965-09-03
US3341542A (en) 1967-09-12
DE1794292B1 (en) 1970-07-23
US3278550A (en) 1966-10-11
GB922831A (en) 1963-04-03

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