Patent ID: 6828287
Filing Date: 2004-12-07
Classification: C10M,F02B

Abstract:
An ester base stock for a two-cycle engine oil composition, said base stock consisting essentially of a blend of (a) a first polyol ester comprising, as its reactive components, a neopentylpolyol and a C16-C20 branched chain, saturated monocarboxylic acid and (b) a second polyol ester comprising, as its reactive components, a neopentylpolyol and a carboxylic acid selected from the group consisting of at least one C5-C10 straight chain, saturated monocarboxylic acid, or at least one C16-C20 straight or branched chain, unsaturated monocarboxylic acid; and, optionally, a relatively low molecular weight ester comprising, as its reactive components, a C8-C13 straight or branched chain monohydric alcohol and a C5-C12 straight or branched chain carboxylic acid, said ester base stock having the following characteristics:(i) biodegradability of &gE;80%, as determined by CEC-L-33-T-82; (ii) flash point of &gE;175Â° C.; and (iii) kinematic viscosity of less than 15 cSt at 100Â° C.