润滑科技信息平台

Lubricant composition for combustion engine containing dispersant additive and polymer dispersant viscosity index improver

专利摘要

A multigrade lubricating oil composition for use in an internal combustion engine which composition comprises : (a) a base oil comprising at least 90 % by weight of the base oil, of one 5 or more basestocks selected from the group consisting of base stocks derived from Fischer Tropsch synthesised, waxy, paraffinic hydrocarbon material by processes comprising hydrocracking and/or hydroisomerisation, Group II basestocks, Group III basestocks and mixtures thereof; (b) one or more dispersant viscosity modifiers in a total amount of 0.15 to 0.8 % by weight of the composition; (c) one or more dispersants in a total amount of active 10 dispersants of 1.5 to 3 % by weight of the composition; (d) one or more detergents; and (e) one or more metal dihydrocarbyl dithiophosphates. ......

基本信息

专利类型:
发明专利
申请/专利号:
AU2013201493
申请日期:
2013-03-13
专利申请人:
卡斯特罗尔有限公司
分类号:
["C10M167/00","C10M161/00"]
发明/设计人:
ADAMS, IEUAN STEPHEN ， BHASKARAN, ASHA ， LAMB, GORDON DAVID
权利要求: CLAIMS L A multigrade lubricating oil composition for use in an internal combustion engine which composition comprises : (a) a base oil comprising at least 90 % by weight of the base oil, of one or more basestocks selected from the group consisting of base stocks derived from Fischer-Tropsch synthesised, waxy, paraffinic hydrocarbon material by processes comprising hydrocracking and/or hydroisomerisation, Group II basestocks, Group III basestocks and mixtures thereof; (b) one or more dispersant viscosity modifiers in a total amount of 0.15 to 0.8 % by weight of the composition; (c) one or more dispersants in a total amount of active dispersants of 1.5 to 3 % by weight of the composition; (d) one or more detergents; and (e) one or more metal dihydrocarbyl dithiophosphates. 2. A composition as claimed in claim 1 in which the one or more detergents are present in the lubricating oil composition in a total active concentration of 1 to 5 % by weight of the composition. 3. A composition as claimed in claim 1 or claim 2 in which the one or more metal dihydrocarbyl dithiophosphates are present in the lubricating oil composition in a total amount, expressed as phosphorus, of 0.01 to 0.2 % by weight of the composition. 4. Use in a multigrade lubricating oil composition comprising one or more dispersants in a total amount of active dispersants of 1.5 to 3 % by weight of the composition, one or more detergents and one or more metal dihydrocarbyl dithiophosphates, of (1) one or more dispersant viscosity modifiers in a total amount of 0.15 to 0.8 % by weight of the composition, in combination with (11) a base oil comprising at least 90 % by weight of the base oil, of one or more basestocks selected from the group consisting of base stocks derived from Fischer-Tropsch synthesised, waxy, paraffinic hydrocarbon material by processes comprising hydrocracking and/or hydroisomerisation, Group II basestocks, Group III basestocks and mixtures thereof, to enhance the anti- wear properties of the lubricating oil composition. c:\NRPortbl\GHMatters\PRIYANKA'4154122 1.docx 13103113 5. Use as claimed in claim 4 in which the use enhances the anti-wear properties with respect to valve train wear of an internal combustion engine. 6. Use as claimed in claim 5 in which the internal combustion engine is a diesel engine. 7. Use as claimed in claim 6 in which the internal combustion engine is a heavy duty diesel engine. 8. A method of reducing the valve train wear of an internal combustion engine which method comprising lubricating the engine with a multigrade lubricating oil composition as claimed in any one of claims I to 3. 9. A method as claimed in claim 8 in which the internal engine is a diesel engine. 10. A method as claimed in claim 9 in which the internal engine is a heavy duty diesel engine. 11. Use as claimed in any one of claims 4 to 7, wherein the multigrade lubricant oil composition is a 10W40 multigrade lubricating oil composition. 12. Use as claimed in any one of claims 4 to 7, wherein the multigrade lubricant oil composition is a 15W40 multigrade lubricating oil composition. c:\NRPortbl\GHMatters\PRIYANKA'4154122 1.docx 13103113