| abstract |
The present invention relates to esters of (A) at least one fluorine-containing hydrocarbon having 1 to 3 carbon atoms and (B) (i) a polyhydroxy compound with a monocarboxy acylating agent having from about 4 to about 15 carbon atoms. And (ii) an ester of a combination of a polyhydroxy combination dicarboxy acylating agent and a monocarboxy acylating agent having from about 7 to about 15 carbon atoms, and (7) alkyl phosphite . A liquid composition comprising a lubricant composed of at least one additive selected from the group consisting of alkyl phosphonic acid esters, fluorine-containing heterocycles, and mixtures thereof. Also described are liquid compositions in which the fluorine-containing hydrocarbon has another halogen, such as chlorine. A method of lubricating a cooling system is also described. Liquid compositions are especially suitable for refrigerators and automobiles and for household use. It is useful as a coolant in air conditioners, including commercial and industrial air conditioners. |