Ester lubricants

摘要

An ester oil which lacks complete miscibility with fluorohydrocarbons has its miscibility with fluorohydrocarbon refrigerants improved by blending it with a second ester oil composed of molecules corresponding to the formula ROOC-CH2CH2-Ä(ROOC)CHCH2Üm-C(COOR)2-ÄCH2CH(COOR)Ün-CH2CH2COOR wherein the R's represent alkyl groups of 1-30 carbons, at least 10% of which are alkyl groups of 1-4 carbons; and each of m and n represents zero or a positive integer such that the sum of m and n in a molecule is 0-30.