Patent ID: 6350392
Filing Date: 2002-02-26
Classification: C09K,C10M,C10N

Abstract:
A refrigerant working fluid consisting essentially of a 1,1,1,2-tetrafluoroethane and the balance of a lubricant composition consisting essentially of an ester blend having a viscosity of about 22 centistokes at 40Â° C. and forming a single phase with said heat transfer fluid between about âˆ’30Â° C. and about +71Â° C., said ester blend consisting essentially of (a) about 31% by weight of an ester having neopentylglycol and a source of 2-ethylhexanoic acid as its reactive components and (b) about 69% by weight of an ester having pentaerythritol and a source of 2-ethylhexanoic acid as its reactive components and wherein the acid value of the lubricant composition is not greater than about 0.02 mg KOH/g.