Refrigeration compositions in which the lubricant comprises at least one ester, ketoester, or ester-nitrile oil

Abstract

Lubricants having a viscosity suitable for a refrigeration lubricant as well as good miscibility with common refrigerants (including R-134a) comprise at least one oil corresponding to the formula Z--C(E)(E').sub.p --Q.sub.s in which Z is alkyl, cycloalkyl, or --(CTT'--CT"G).sub.w --CTT'--CHT"G; Q is --(CTT'--CT"G).sub.t --CTT'--CHT"G; T, T', and T" are independently selected from hydrogen G', and organic groups containing up to 20 carbons; E, E', G, and G' are independently selected from --COOR, --C(O)R', and --CN electron withdrawing groups wherein R and R' represent hydrocarbyls containing 1-30 carbons, with the proviso that at least about 50% of the electron withdrawing groups are --COOR; p is zero or one; s is respectively two or one; and each of t and w represents zero or a positive integer.

Dependencies are inferred from the claim text.