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US 5,994,279 AGranted
High viscosity, biodegradable lubricating oil
AssigneeExxon Research & Engineering Co.
InventorsGerald Felsky, Chung-Lai Wong, Todd Timothy Nadasdi
Life of this patent
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Abstract
A lubricant composition especially useful for saw guide use comprises a base oil composed of at least one synthetic ester and a thickener composed of a styrene-olefin copolymer dissolved in a vegetable oil. The thickener is present in an amount sufficient to provide the lubricant with a viscosity at 40.degree. C. of greater than about 100 cSt.
Claims9
A lubricant composition comprising:
- a base oil of at least one synthetic ester oil;
- and a thickener composed of a styrene copolymer dissolved in a vegetable oil, the thickener being present in an amount sufficient to provide the lubricant composition with a viscosity at 40.degree. C. of greater than about 100 cSt.
A biodegradable sawguide lubricant composition comprising:
- a base oil having a viscosity at 40.degree. C. of from about 2 to about 50 cSt and composed of at least one synthetic ester;
- a thickener composed of a styrene-olefin copolymer dissolved in rapeseed or canola oil, the copolymer having a number average molecular weight of about 50,000 to about 500,000, wherein the copolymer comprises 10 to 90 wt. % of the thickener, the thickener being present in the lubricant composition in an amount sufficient to provide a lubricant composition having a viscosity at 40.degree. C. of about 110 to about 130 cSt.
Dependencies are inferred from the claim text.