Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Solid hydrocarbon polymer
Patent
1999-02-17
2000-03-07
McAvoy, Ellen M.
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Solid hydrocarbon polymer
585 11, 585 13, 525314, 525316, C10M14300, C08F29300
Patent
active
060340428
ABSTRACT:
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 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.
REFERENCES:
patent: H1799 (1999-08-01), Rhodes et al.
patent: 4116917 (1978-09-01), Eckert
patent: 4156673 (1979-05-01), Eckert
patent: 4242471 (1980-12-01), Lal
patent: 4900875 (1990-02-01), Rhodes et al.
patent: 5070131 (1991-12-01), Rhodes et al.
patent: 5266647 (1993-11-01), Bender et al.
patent: 5360564 (1994-11-01), Sutherland et al.
patent: 5458791 (1995-10-01), Rhodes et al.
patent: 5458796 (1995-10-01), Storey et al.
patent: 5460739 (1995-10-01), Rhodes et al.
patent: 5717035 (1998-02-01), Coolbaugh et al.
Haas Donald F.
McAvoy Ellen M.
Shell Oil Company
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