Patent ID: 8465665

Claim:
A refrigerator oil composition, comprising: a base oil which is at least one member selected from a polyalkylene glycol, a polyvinyl ether, a polyvinyl ether-polyalkylene glycol copolymer and a polyol ester; and at least one polyamide compound having two or more amide groups in the molecule selected from the group consisting of a saturated fatty acid bisamide, an unsaturated fatty acid bisamide and an aromatic bisamide, wherein the saturated fatty acid bisamide is selected from the group consisting of methylenebislauramide, methylenebisstearamide, methylenebishydroxystearamide, ethylenebiscaprylamide, ethylenebiscapramide, ethylenebislauramide, ethylenebisstearamide, ethylenebisisostearamide, ethylenebishydroxystearamide, ethylenebisbehenamide, hexamethylenebisstearamide, hexamethylenebisbehenamide, hexamethylenebishydroxystearamide, butylenebishydroxystearamide, a condensation product of caprylic acid with diethylenetriamine (molar ratio 3:1), a condensation product of lauric acid with triethylenetriamine (molar ratio 4:1), a condensation product of propanoic acid with tridecaethylenetetradecamine (molar ratio 11:1) and a condensation product of isostearic acid with tetraethylenepentamine; and a % by mass of the at least one polyamide compound is from 0.01 to 5% by mass based on the total amount of the refrigerator oil composition.