Patent ID: 6498129
Filing Date: 2002-12-24
Classification: C10L,C10M,C10N

Abstract:
A two-cycle lubricating oil composition having a Brookfield viscosity at âˆ’25Â° C. of about 2,000 to 7,500 cps which consists of an admixture of the following:(a) 1.5-8% by weight (active ingredient basis) of a polyisobutylene amine, the polyisobutylene having an Mn molecular weight of about 400-1500; (b) 2.5-8% by weight (active ingredient basis) of a nitrogen-containing lubricating oil dispersant being a reaction product of an oil soluble hydrocarbyl substituted carboxylic acylating agent wherein the hydrocarbyl substituent has an Mn of about 450 to about 5000, and a polyamine; (c) 7-8% by weight of a polybutene polymer having an Mn molecular weight of about 900-1500; (d) 10-45% by weight of a normally liquid hydrocarbon solvent having a boiling point range of 120-380Â° C. and a flash point in the range of 55-140Â° C.; and (e) the balance an oil of lubricating viscosity.