Patent ID: 6666985
Filing Date: 2003-12-23
Classification: C08G,C08K,C08L,C09K,C10M,C10N,H01B

Abstract:
A refrigerant working fluid consisting essentially of a heat transfer fluid consisting of a substantially chlorine-free fluoro-group containing organic refrigerating heat transfer fluid and a composition of matter suitable for serving as a lubricant or lubricant base stock, said composition being a liquid with a viscosity between about 22.5 and about 44 centistokes at 40Â° C., remaining in a single phase with the heat transfer fluid between about âˆ’40Â° C. and about +71Â° C. and consisting essentially of a mixture of polyol ester molecules in which at least about 92% of the alcohol moieties are selected from the group consisting of the alcohol moieties derived from TMP, DTMP, PE and DPE and in which only monobasic acids are used to make the ester, said monobasic acid groups being further selected subject to the constraints that (a) the % of monobasic acid groups in the mixture that contain at least nine carbon atoms whether branched or not is not greater than about 67; (b) a total of at least about 20% of the monobasic acid groups in the mixture are from one of the trimethylhexanoic acids and (c) at least about 60% carbon atoms of the monobasic acid groups in the acid mixture consist of molecules having either five or nine carbon atoms each.