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Method for preparing salts of polyolefinic substituted dicarboxylic acids in oleaginous mixtures of reduced viscosity

专利摘要

The present invention is directed to methods of producing reduced viscosity oleaginous compositions containing Group I-B, II-A and II-B metal, particularly copper and/or zinc, salts of the product of a polyolefin having a number average molecular weight (Mn) of at least 600 which has been substituted with at least one dicarboxylic acid producing moiety per polyolefin molecule, wherein the metal salt product is contacted with lower aliphatic or cycloaliphatic amines having from 1 to 4 nitrogen atoms per molecule. The compositions of the present invention can also provide increased stability to viscosity growth, e.g. during storage of the materials prepared by the process of this invention. The resulting solutions are useful in lubricating oils as additives, e.g., as antioxidant lube oil additives. ......

基本信息

专利类型:
发明专利
申请/专利号:
EP1989305873
申请日期:
1989-06-09
专利申请人:
埃克森化学专利公司
分类号:
["C10L1/22","C10L1/30","C10M133/52","C10M159/12","C10M159/18","C10N10/02","C10N10/04","C10N20/02","C10N20/04"]
发明/设计人:
COLCORD, LAURA JEAN ， EMERT, JACOB ， WADDOUPS, MALCOLM ， LUNDBERG, ROBERT DEAN
权利要求: 1. A process for producing an oleaginous solution containing copper salts of polyolefinic dicarboxylic acids having reduced viscosity comprising the steps of: (a) providing a copper salt of a polyolefinic substituted dicarboxylic acid material, said polyolefinic substituent being derived from an olefin polymer of a C₂ to C₁₀ monoolefin having a number average molecular weight greater than 600, and said dicarboxylic acid moiety being derived from a C₄ to C₁₀ monounsaturated dicarboxylic acid material; and (b) a reacting or complexing at least a portion of the product of step (a) in a liquid reaction solvent with an amine selected from aliphatic and cycloaliphatic amines containing from 1 to 4 nitrogen atoms per molecule, said amine having at least one primary or secondary nitrogen atom per molecule.2. A process according to claim 1 wherein said monounsaturated acid material comprises at least one member selected from maleic acid, maleic anhydride, itaconic acid, chloromaleic acid, chloromaleic anhydride, and dimethyl fumarate.3. A process according to claim 1 or claim 2 wherein the polyolefinic substituent comprises polyisobutylene, polybutylene or mixtures thereof.4. A process according to any preceding claim wherein the polyolefinic substituent is derived from a polymer having a number average molecular weight of 900 to 3000.5. A process according to claim 4 wherein the polyolefinic substituted dicarboxylic acid material is selected from polyisobutenyl or polybutenyl succinic acid or anhydride.6. A process according to any preceding claim wherein the amine comprises at least one aliphatic saturated amine of the general formulae: wherein R, R′, R˝ and R˝′ are independently selected from hydrogen, C₁₋₂₅ straight or branched chain alkyl, C₁₋₁₂ alkoxy, and C₂₋₆ alkylene, and wherein R˝′ can additionally comprise a moiety of the formula: wherein R′ is as defined above, and wherein each of s and s′ can be the same or a different number from 2 to 6, and t and t′ can be the same or a different number from 0 to 2, with the proviso that the amine contains not more than 4 nitrogen atoms per molecule.7. A process according to claim 6 wherein the amine comprises at least one member selected from 1,2-diaminoethane, 1,3-diaminopropane, 1,4-diaminobutane, 1,6-diaminohexane, diethylene triamine, triethylene tetramine, 1,2-propylene diamine, di(1,2-propylene)triamine, di(1,3-propylene)triamine, N,N-dimethyl-1,3-diaminopropane, N,N-di-(2-aminoethyl)ethylene diamine, N,N-di(2-hydroxyethyl)-1,3-propylene diamine, 2-propyldodecylamine, N-dodecyl-1,3-propane diamine, diisoproanolamine, diethanolamine, and N-(3-aminopropyl)morpholine.8. A process according to claim 1 wherein the amine comprises at least one polyoxyalkylene polyamine of the formulae: NH₂-alkylene-(-O-alkylene-)m-NH₂ where m has a value of 1 to 2, and R-(-alkylene-[-O-alkylene-]n-NH₂)a where n has a value of 1 to 2, R is a substituted saturated hydrocarbon radical of from 1 to 3 carbon atoms, wherein the number of substituents on the R group is represented by the value of "a" which is a number from 1 to 3.9. A process according to claim 8 wherein said alkylene groups are straight or branched chain and contain from 2 to 4 carbon atoms.10. A process according to any preceding claim wherein said amine and said product of step (a) are contacted with stirring at a temperature of from 100 to 150°C for a period from 30 min. to 3 hours.11. A process according to any of claims 1 to 9 wherein said amine and said product of step (a) are contacted with stirring at a temperature of from 110 to 135°C for a period from 30 min. to 3 hours.12. A process according to any preceding clain wherein from 1 to 10 equivalents of reactive primary or secondary amine are provided per mole of dicarboxylic acid moiety of the product of step (a).13. A process according to any of claims 1 to 10 wherein from 1.5 to 5 equivalents of reactive primary or secondary amine are provided per mole of dicarboxylic acid moiety of the product of step (a).14. A process according to any preceding claim wherein the liquid reaction solvent is a hydrocarbon oil.15. A process according to claim 14 wherein step (a) is carried out in the presence of said hydrocarbon oil and the produced solution is passed to step (b).16. A process according to any preceding claim wherein the liquid reaction solvent is a lubricating oil.