| 发明名称 |
Star polymer viscosity index improver for oil compositions |
| 摘要 |
The present invention includes star polymers which can be used as viscosity index improvers in oil compositions formulated for high performance engines. The star polymers have copolymer arms of hydrogenated polyisoprene and polystyrene with sufficient amounts of polystyrene to be finishable as a polymer crumb.
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| 申请公布号 |
USH1799(H) |
申请公布日期 |
1999.08.03 |
| 申请号 |
US19930164733 |
申请日期 |
1993.12.07 |
| 申请人 |
SHELL OIL COMPANY |
发明人 |
RHODES, ROBERT BARNETT;ATWOOD, HARVEY E.;GORMAN, JOHN EUGENE |
| 分类号 |
C08F8/00;C08F8/04;C08F297/02;C08F297/04;C08G81/02;C10M143/12 |
主分类号 |
C08F8/00 |
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