| 发明名称 |
STAR POLYMER VISCOSITY INDEX IMPROVER FOR OIL COMPOSITIONS |
| 摘要 |
Star polymers which can be used as viscosity index improvers in oil compositions formulated for high performance engines. The star polymers have tetrablock copolymer arms of hydrogenated polyisoprene- polybutadiene-polyisoprene with a block of polystyrene and which provide excellent low temperature performance in lubricating oils, exhibit good thickening efficiency, and are finishable as polymer crumb.
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| 申请公布号 |
CA2321006(C) |
申请公布日期 |
2008.01.22 |
| 申请号 |
CA19992321006 |
申请日期 |
1999.02.16 |
| 申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
RHODES, ROBERT BARNETT |
| 分类号 |
C10M143/12;C08F8/04;C08F297/00;C08F297/04;C08L53/02;C10M143/10;C10N20/02;C10N30/04;C10N40/25;C10N60/02 |
主分类号 |
C10M143/12 |
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