发明名称 |
Viscosity-index improvers. |
摘要 |
The invention provides polymers comprising: at least 3 first arms, each arm comprising a hydrogenated, polymerised conjugated diene and having a peak molecular weight from 10,000 to 200,000; at least 3 second arms, each arm comprising a polymerised methacrylate and/or amide or imide derivative thereof and having a peak molecular weight from 500 to 10,000; and a central core comprising a polymerised bisunsaturated monomer, wherein the central core connects the first and second arms in a star configuration; a process for their preparation; lubricating oil compositions containing them; and their use as viscosity-index improver additives.
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申请公布号 |
EP0603955(A2) |
申请公布日期 |
1994.06.29 |
申请号 |
EP19930203556 |
申请日期 |
1993.12.17 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
SUTHERLAND, ROBERT JUDE;DUBOIS, DONN ANTHONY |
分类号 |
C08F279/02;C08F8/04;C08F8/32;C08F279/00;C08F297/02;C10M145/14;C10M149/02;C10M149/06;C10N20/04;C10N30/02;C10N30/08;C10N40/04;C10N40/08;C10N40/20;(IPC1-7):C08F8/04;C08C19/02 |
主分类号 |
C08F279/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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