Lubricant oil composition for compression refrigerator
AssigneeIdemitsu Kosan Co., Ltd.
InventorTomoya Matsumoto
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Abstract
The present invention is able to provide a lubricating oil composition for compression refrigerating machine having excellent thermal/chemical stability even when used for a compression refrigerating machine using a saturated fluorinated hydrocarbon refrigerant having a low carbon number and a low global warming potential, by using a refrigerant containing a saturated fluorinated hydrocarbon having from 1 to 3 carbon atoms, which uses, as a base oil, an oxygen-containing organic compound composed of at least one member selected from a polyoxyalkylene glycol, a polyvinyl ether, a copolymer of a poly(oxy)alkylene glycol and a polyvinyl ether, a copolymer of a poly(oxy)alkylene glycol monoether and a polyvinyl ether, and a polyol ester, each having a hydroxyl value of not more than 15 mgKOH/g.
Claims19
A composition, comprising:
- (i) a refrigerant consisting of difluoromethane R32;
- and
- (ii) a lubricating composition consisting of
- a base oil consisting of at least one selected from the group consisting of
- a polyvinyl ether,
- a copolymer of a poly(oxy)alkylene glycol and a polyvinyl ether, and
- a copolymer of a poly(oxy)alkylene glycol monoether and a polyvinyl ether,
- wherein each base oil has a hydroxyl value of not more than 15 mgKOH/g,
- optionally from 0.01 to 5% by mass of an antioxidant, based on the total amount of the lubricating oil composition,
- optionally from 0.005 to 10% by mass of an acid scavenger, based on the total amount of the lubricating oil composition, and
- optionally at least one additive selected from the group consisting of an extreme pressure agent, an oiliness agent, a metal deactivator, and a defoaming agent.
Dependencies are inferred from the claim text.