Environmentally friendly viscosity index improving compositions
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United States of America Patent
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Mar 21, 1995
Issued Date -
N/A
app pub date -
Dec 10, 1993
filing date -
Dec 18, 1992
priority date (Note) -
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Abstract
A lubricant composition having improved viscosity index characteristics is described that comprises (A) at least one vegetable or synthetic triglyceride oil of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are aliphatic hydrocarbyl groups having at least 60 percent monounsaturated character and containing from about 6 to about 24 carbon atoms and further wherein an oleic acid moiety:linoleic acid moiety is from about 2 up to about 90 and (B) at least one mixed ester of a carboxy-containing interpolymer. Optionally, the composition may also contain (C) a synthetic ester base oil, and (D) an antioxidant.
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