Liquid compositions containing carboxylic esters

A liquid composition comprising

• (A) from about 70 to about 99% by weight of a fluorohydrocarbon containing two carbon atoms, and
• (B) from about 1 to about 30% by weight of a soluble organic lubricant comprising at least one carboxylic ester compound represented by one of the formulae
• RO(R.sup.1 O).sub.n C(O)R.sup.2 (I)
• and
• R.sup.3 OC(O)R.sup.2 (II)
• wherein R is a hydrocarbyl group containing from 2 to about 50 carbon atoms, provided that when R.sup.2 is H or hydrocarbyl, R contains at least 6 carbon atoms,
• R.sup.1 is a hydrocarbylene group containing from 1 to about 7 carbon atoms,
• R.sup.2 is H, hydrocarbyl, -CF.sub.3, -R.sup.4 CN, -R.sup.4 - NO.sub.2, or R.sup.5 OCH(R.sup.6)-,
• R.sup.3 is a -R.sup.4 CF.sub.3, -R.sup.4 CN or -R.sup.4 NO.sub.2 group, provided that R.sup.3 is a hydrocarbyl group when R.sup.2 is -R.sup.4 CN,
• n is an integer from 1 to about 50,
• R.sup.4 is a hydrocarbylene group containing from 1 to about 20 carbon atoms,
• R.sup.5 is H, a lower hydrocarbyl group or R.sup.7 C(O)- where R.sup.7 is a hydrocarbyl group, and
• R.sup.6 is H or a lower alkyl group.

A liquid composition comprising

• (A) from about 70 to about 99% by weight of 1,1,1,2-tetrafluoroethane, and
• (B) from about 1 to about 30% by weight of a soluble organic lubricant free of acetylenic and aromatic unsaturation and comprising at least one carboxylic ester compound represented by the formula
• RO(R.sup.1 O).sub.n C(O)R.sup.2 (I)
• wherein R is a hydrocarbyl group containing from 2 to about 20 carbon atoms, provided that when R.sup.2 is H or hydrocarbyl, R contains at least 6 carbon atoms,
• R.sup.1 is an alkylene group containing from 1 to about 3 carbon atoms,
• R.sup.2 is hydrogen, a lower alkyl group, an alkoxy methylene group, or -R.sup.4 CN, wherein R.sup.4 is an alkylene group containing from 1 to about 20 carbon atoms, and
• n is an integer of 1 to about 20.

A liquid composition comprising

• (A) from about 70% to about 99% by weight of 1,1,1,2-tetrafluoroethane, and
• (B) from about 1 to about 30% by weight of at least one carboxylic ester compound, characterized by the formula
• R.sup.3 OC(O)R.sup.2 (II)
• wherein R.sup.2 is H, an alkyl group containing from 1 to 10 carbon atoms, a lower alkoxymethylene group, -CF.sub.3, -R.sup.4 NO.sub.2, R.sup.7 C(O)OCH.sub.2 -, or -R.sup.4 CN, and
• R.sup.3 is a -R.sup.4 CF.sub.3, -R.sup.4 CN or -R.sup.4 NO.sub.2 group wherein R.sup.4 is an alkylene group containing from 1 to about 10 carbon atoms, and R.sup.7 is a hydrocarbyl group.