Patent ID: 8894875
Filing Date: 2014-11-25
Classification: C10M,C10N

Abstract:
1. A lubricating oil for a compression type refrigerator, comprising: 70% by mass or more of a polyvinyl ether-based compound containing an alkylene glycol or polyoxyalkylene glycol unit and a vinyl ether unit in a molecule and having a molecular weight in a range of 300 to 3,000; and 0. 01 to 5% by mass of an epoxy compound selected from the group consisting of a glycidyl ether having 5 to 30 carbon atoms and an α-olefin oxide having 8 to 50 carbon atoms, wherein the polyvinyl ether-based compound has a carbon/oxygen molar ratio of 4.0 or less and has a structure represented by the general formula (I): wherein R R R R when plural R m represents an average value of 15 to 21; k represents a number of 1 to 50; p represents a number of 2 to 50; when plural ks and ps are present, units may be in block or in random form; and when plural R