Environmentally friendly viscosity index improving compositions
AssigneeThe Lubrizol Corporation
InventorsRichard M. Lange, Joseph G. Seebauer, Conrad A. Mamajek
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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.
Claims28
An environmentally friendly viscosity index improving composition comprising:
- (A) at least one vegetable or synthetic triglyceride oil of the formula ##STR14## 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.
Dependencies are inferred from the claim text.