Lubricants containing ashless antiwear-dispersant additive having viscosity index improver credit
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United States of America Patent
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Mar 20, 2001
Grant Date -
N/A
app pub date -
Dec 2, 1999
filing date -
Feb 3, 1997
priority date (Note) -
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Abstract
A graft copolymer is disclosed. The copolymer is prepared by the interpolymerization of a mixture of monomers comprising ethylene, a C.sub.3 to C.sub.12 alpha monoolefin, and a polyene being a member selected from the group consisting of non-conjugated dienes and trienes. Grafted to the copolymer is a 2-mercapto-1,3,4-thiadiazole moiety. Lubricating oil additives and lubricating oils comprising the graft copolymer are also disclosed.
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