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US 5,378,249 AGranted
Biodegradable lubricant
AssigneePennzoil Products Company
InventorDavid S. Morrison
Life of this patent
Estimating the term…
Abstract
A biodegradable two-cycle engine oil composition comprises about (a) 20 to 85 wt. % of a heavy ester or a mixture of heavy ester oils characterized by a kinematic viscosity of at least about 7.0 cSt at 100.degree. C., (b) 10 to 85 wt. % of a light ester oil or a mixture of light ester oils characterized by a kinematic viscosity of less than about 6.0 cSt at 100.degree. C., and optionally an additive, wherein the composition has a biodegradability of at least about 66% as measured by the CEC L-33-T-82 method.
Claims18
A biodegradable oil composition comprising:
- (a) 20 to 85 wt. % of a heavy ester oil or mixture of heavy ester oils, wherein said heavy ester oil is characterized by a kinematic viscosity of at least about 7.0 cSt at 100.degree. C., and
- (b) 10 to 85 wt. % of a light ester oil or mixture of light ester oils, wherein said light ester oil is characterized by a kinematic viscosity of less than about 6.0 cSt at 100.degree. C.;
- wherein said composition has a biodegradability of at least about 66% as measured by the CEC L-33-T-82 method.
A gasoline/oil mixture comprising:
- a biodegradable oil composition of
- (a) 20 to 85 wt. % of a heavy ester oil or mixture of heavy ester oils, wherein said heavy ester oil is characterized by a kinematic viscosity of at least about 7.0 cSt at 100.degree. C.;
- (b) 10 to 85 wt. % of a light ester oil or mixture of light ester oils, wherein said light ester oil is characterized by a kinematic viscosity of less than about 6.0 cSt at 100.degree. C.;
- wherein said biodegradable oil composition has a biodegradability of at least about 66% as measured by the CEC L-33-T-82 method;
- and
- (c) 0.01 to 20 wt. % of one or more additives;
- said additives being selected from the group consisting of detergents, rust inhibitors, anti-corrosives, surfactants, pour point depressants, wax modifiers and mixtures thereof;
- and
- gasoline, wherein said oil is mixed with gasoline in a gasoline/oil ratio in the range of 100:1 to 10:1.
6 more elements
Dependencies are inferred from the claim text.