Patent ID: 6632781
Filing Date: 2003-10-14
Classification: C10M,C10N

Abstract:
A lubricant composition which comprises:a base oil of lubricating viscosity; a dispersed hydrated alkali metal borate; and a dispersant mixture comprising: a) a polyalkylene succinic dispersant which is selected from the group consisting of a polyalkylene succinic anhydride, a non-nitrogen containing derivative of the polyalkylene succinic anhydride, mixtures of polyalkylene succinic anhydrides, mixtures of non-nitrogen containing derivatives of the polyalkylene succinic anhydride, and mixtures of one or more polyalkylene succinic anhydrides and one or more non-nitrogen containing derivatives of the polyalkylene succinic anhydride; and b) a metal salt of a polyisobutenyl sulfonate, wherein the polyisobutenyl moiety has a number average molecular weight from about 400 to 1200.