Antifoam additives for use in low viscosity lubricating oil applications

摘要

A lubricant composition comprising a major amount of a base oil having a kinematic viscosity between 2 and 8 cSt at 100°C and a minor amount of an additive composition represented by formula IV:
wherein x and y can be the same or different and (x + y) equals between 50 and 1,500 and m and n can be the same or different and Q is hydrogen or a monovalent organic group selected from the group consisting of C1-C8 alkyl, acetyl and isocyanato group of the formula -NCO.