Patent ID: 6551523
Filing Date: 2003-04-22
Classification: C09K,C10M,C10N

Abstract:
A refrigerant working fluid consisting essentially of a substantially chlorine-free fluoro-group containing heat transfer fluid and the balance of a lubricant composition consisting essentially of an ester blend having a viscosity of about 10 centistokes at 40Â° C. and forming a single phase with said heat transfer fluid below about âˆ’40Â° C., said ester blend consisting essentially of (a) about 78% to about 79% by weight of an ester having neopentylglycol and a source of 2-ethylhexanoic acid as its reactive components and (b) about 21% to about 22% 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.