Patent ID: 9506006
Filing Date: 2016-11-29
CPC Classification: C10M,C10N

Claim Text:
1. A composition comprising (a) a major amount of an oil of lubricating viscosity, (b) between 1 to 3 wt % on an oil-free basis of a quaternary ammonium salt comprising the reaction product of: (i) a polyisobutylene succinic anhydride and a compound having an oxygen or nitrogen atom capable of condensing with said polyisobutylene succinic anhydride, and further having a tertiary amino group; and (ii) a quaternizing agent suitable for converting the tertiary amino group to a quaternary nitrogen, wherein the quaternizing agent is selected from the group consisting of (i) organic carbonates; (ii) hydrocarbyl epoxides, (iii) mixtures of hydrocarbyl epoxides and acids, or (iv) mixtures of any of (i)-(iii), and (c) between 1 to 6 wt % on an oil-free basis of a succinimide dispersant comprising the reaction product of a polyisobutylene succinic anhydride and an alkylene polyamine.