Patent ID: 8293689
Filing Date: 2012-10-23
Classification: C10M,C10N

Abstract:
1. A lubricating composition comprising: (a) an oil of lubricating viscosity; (b) a polymer of Formula (I), wherein the polymer has pendant groups as represented within ( ) wherein p is an integer in the range of about 1 to about 15; R′ and R″ are independently linear or branched hydrocarbyl groups, and the combined total number of carbon atoms present on R′ and R″ is at least about 12, wherein a steric hindrance factor F that is defined by the equation: wherein F is the steric hindrance factor; U and Y represent the total atom numbers at the 6th position and the 7th position, respectively, in the side chain(s), counted from the backbone, and wherein the steric hindrance factor is about 20 to about 30; and