Patent ID: 6299792
Filing Date: 2001-10-09
Classification: C09K,C10M,C10N

Abstract:
A refrigerant composition, comprising:(a) a halogenated hydrocarbon containing at least one carbon atom and one fluorine atom;(b) at least one oil selected from the group consisting of paraffins, naphthenes, aromatics, alkylaryls, synthetic paraffins and polyalphaolefins; and(c) a polymeric oil-return agent comprising a fluorinated polymer formed from at least one monomer selected from the group consisting of monomers represented by the formulae CH.sub.2 =C(R.sup.1)--CO.sub.2 --R.sup.2 and CH.sub.2 =C (R.sup.3) --C.sub.6 H.sub.4 --R.sup.4 ; wherein R.sup.1 and R.sup.3 are independently selected from the group consisting of hydrogen and C.sub.1 through C.sub.4 alkyl radicals; wherein R.sup.2 and R.sup.4 are independently selected from the group consisting of hydrocarbon radicals optionally containing oxygen and halogen atoms other than fluorine, and fluorinated hydrocarbon radicals optionally containing oxygen and halogen atoms other than fluorine; and wherein said oil-return agent comprises less than about 10 weight percent of said refrigerant composition.