Patent ID: 6406642
Filing Date: 2002-06-18
Classification: C09K,C10M,C10N

Abstract:
A lubricating composition, comprising:(a) a refrigerant comprising one or more hydrofluorocarbons; and (b) a polyether having the formula (1): R1&Parenopenst;Xâ€”OR4)8â€ƒâ€ƒ(1) wherein:R1 is a s-valent group having an aromatic nucleus; X is a bivalent group comprising average q â€”OR2â€” and average r â€”OR3â€”; R2 is an ethylene group which is optionally substituted by methyl or ethyl; R3 is an ethylene group substituted by an alkoxymethyl group wherein the carbon number of the alkoxy group is from 1 to 4; R4 is C1-C10 alkyl; s is an integer of from 1 to 6; q is from 0 to 6; and r is at least 0.5; provided that (q+r)Ã—s is a number of from 3 to 80.