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Aliphatic hydrocarbon substituted aromatic hydrocarbons to control black sludge in lubricants

专利摘要

A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount, effective to inhibit the accumulation of black sludge in a gasoline fueled internal combustion engine, of an aliphatic hydrocarbon substituted aromatic hydrocarbon. The aliphatic hydrocarbon substituted aromatic hydrocarbon comprises a compound of the formula Ar-R-(Ar)n wherein each Ar is independently an aromatic nucleus having from 0 to 3 substituents, R is a hydrocarbyl group, and n is an integer ranging from 1 to about 6. In a further embodiment, the aliphatic hydrocarbon substituted aromatic hydrocarbon further comprises from about 1 to about 50 percent by weight of tetrahydronaphthalene or hydrocarbyl substituted tetrahydronaphthalenes. ......

基本信息

专利类型:
发明专利
申请/专利号:
US07/071003
申请日期:
1987-07-08
专利申请人:
路博润公司
分类号:
["C10M141/06","C10M141/00","C10M127/00","C10M127/06","F02F7/00","C10M161/00","C10M133/44"]
发明/设计人:
MURPHY, JOHN P.
权利要求: What is claimed is:1. In a lubricating oil composition which allows the accumulation of black sludge in a gasoline fueled internal combustion engine, the improvement which comprises incorporating into the lubricating oil composition a minor amount, effective to inhibit the accumulation of black sludge in said engine, of an aliphatic hydrocarbon substituted aromatic hydrocarbon which comprises of a composition of the formulaAr--R--(Ar).sub.n (I)wherein each Ar is independently an aromatic nucleus having from 0 to 3 substituents, R is a hydrocarbyl group, and n is an integer ranging from 1 to about 6, with the proviso that n does not exceed the available valences of R.2. In the lubricating oil composition of claim 1 wherein the aliphatic hydrocarbon substituted aromatic hydrocarbon further comprises from about 1 to about 50 percent by weight of tetrahydronaphthalene or hydrocarbyl substituted tetrahydronaphthalenes.3. In the lubricating oil composition of claim 1 wherein at least one Ar is a benzene ring having from 0 to 3 substituents.4. In the lubricating oil composition of claim 1 wherein n is 1 or 2.5. In the lubricating oil composition according to claim 1 wherein R contains from about 6 to about 30 carbon atoms.6. In the lubricating oil composition according to claim 1 wherein each substituent is independently a hydrocarbyl based group having from about 6 to about 30 carbon atoms.7. In the lubricating oil composition according to claim 5 wherein the aromatic nucleus is a benzene ring and n equals 1 or 2.8. In the lubricating composition according to claim 7, which further comprises from about 0.5 to about 10 percent by weight of the reaction product of an alkyl or alkenyl substituted succinic anhydride or derivative thereof, wherein the alkyl or alkenyl group contains at least about 30 carbon atoms, with an ethylene polyamine.9. A lubricating oil composition comprising a major amount of an oil of lubricating viscosity and a minor amount, effective to inhibit the accumulation of black sludge in a gasoline fueled internal combustion engine, of an aliphatic hydrocarbon substituted aromatic hydrocarbon which comprises a composition of the formulaAr--R--(Ar).sub.n (I)wherein each Ar is independently an aromatic nucleus having from 0 to 3 substituents, R is a hydrocarbyl group, and n is an integer ranging from 1 to about 6, with the proviso that n does not exceed the available valences of R.10. The lubricating oil composition according to claim 9 wherein the aliphatic hydrocarbon substituted aromatic hydrocarbon comprises from about 1 percent to about 50 percent by weight of tetrahydronaphthalene or hydrocarbyl substituted tetrahydronaphthalenes.11. The lubricating oil composition according to claim 9 wherein R contains from about 6 to about 30 carbon atoms.12. The lubricating oil composition of claim 11 which further comprises an alkenyl arene-conjugated diene interpolymer.13. The lubricating oil composition according to claim 11 wherein the aromatic nucleus is a benzene ring and n equals 1 or 2.14. The lubricating oil of claim 13 which further comprises from about 0.5 to about 10 percent by weight of the reaction product of an alkyl or alkenyl substituted succinic anhydride or derivative thereof, wherein the alkyl or alkenyl group contains at least about 30 carbon atoms, with an ethylene polyamide.15. A method for inhibiting the accumulation of black sludge in a gasoline fueled internal combustion engine, which method comprises lubricating said internal combustion engine with a lubricating oil composition comprising a minor amount, effective to inhibit the accumulation of black sludge in said engine, of an aliphatic hydrocarbon substituted aromatic hydrocarbon which comprises a composition of the formulaAr--R--(Ar).sub.n (I)wherein each Ar is independently an aromatic nucleus having from 0 to 3 substituents, R is a hydrocarbyl group, and n is an integer ranging from 1 to about 6, with the proviso that n does not exceed the available valences of R.16. The method of claim 15 wherein the aliphatic hydrocarbon substituted aromatic hydrocarbon comprises from about 1 to about 50 percent by weight of tetrahydronaphthalene or hydrocarbyl substituted tetrahydronaphthalenes.17. The method according to claim 15 wherein R contains from about 6 to about 30 carbon atoms.18. The method according to claim 17 wherein the aromatic nucleus is a benzene ring and n equals 1 or 2.19. The method according to claim 15 wherein the lubricating oil composition further comprises about 0.5 to about 10 percent by weight of the reaction product of an alkyl or alkenyl substituted succinic anhydride or derivative thereof, wherein the alkyl or alkenyl group contains at least about 30 carbon atoms, with an ethylene polyamine.