Patent ID: 6221272
Filing Date: 2001-04-24
Classification: C08G,C08K,C08L,C09K,C10M,C10N,H01B

Abstract:
A refrigerant working fluid consisting essentially of 1,1,1,2-tetrafluoroethane 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 40.degree. C., remaining in a single phase with the heat transfer fluid between about -40.degree. C. and about +71.degree. 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 acyl groups being further selected subject to the constraints that (a) the % of acyl 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 acid molecules in the mixture are from one of the trimethylhexanoic acids and (c) at least about 90% of the acyl groups in the acid mixture consist of molecules having either five or nine carbon atoms each.