发明名称 |
Process for preparing a viscosity index improver. |
摘要 |
Degraded molecular weight copolymers of ethylene alpha-olefin are provided. The ethylene alpha-olefin copolymers, before degradation, are characterized by having a narrow molecular weight distribution and are comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains. The degraded copolymers are useful as viscosity index improvers for oils. |
申请公布号 |
EP0422859(A2) |
申请公布日期 |
1991.04.17 |
申请号 |
EP19900310975 |
申请日期 |
1990.10.05 |
申请人 |
EXXON CHEMICAL PATENTS INC. |
发明人 |
CHUNG, DAVID YEN-LUNG;STRUGLINSKI, MARK JOSEPH |
分类号 |
C08F8/50;C08L23/16;C08L53/00;C10L1/16;C10L1/18;C10L1/195;C10L1/198;C10L1/236;C10L1/238;C10L1/24;C10L10/08;C10M143/02;C10M145/02;C10M149/06;C10M151/02;C10M159/12;C10N20/04;C10N30/02;C10N70/00 |
主分类号 |
C08F8/50 |
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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