Dispersant viscosity index improving additive for lubricating oils
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United States of America Patent
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Dec 22, 1998
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N/A
app pub date -
Jan 29, 1997
filing date -
Nov 10, 1994
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Abstract
The present invention provides dispersant viscosity index improving additives for lubricating oils. The additives are copolymers comprising from 92 weight percent to 98 weight percent of a polymer backbone and from 2 weight percent to 8 weight percent branches grafted onto the polymer backbone.
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