Lubricating oil composition for refrigerators
AssigneeIdemitsu Kosan Co., Ltd.
InventorMasato Kaneko
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Abstract
Provided is a lubricating oil composition for a refrigerator which uses a base oil including as the main component at least one kind of oxygen-containing compounds selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of poly(oxy)alkylene glycols or monoethers thereof and polyvinyl ethers, polyol esters, and polycarbonates. The lubricating oil composition for a refrigerator is used for a refrigerator that uses, as a refrigerant, a fluorine-containing organic compound, which is a refrigerant applicable to current car air conditioner systems or the like and has a specific polar structure, and has favorable sealing property, a low coefficient of friction factor in a sliding part, and excellent stability as well as excellent compatibility with the refrigerant.
Claims19
A composition, comprising:
- (i) a refrigerant consisting of an unsaturated fluorinated hydrocarbon compound represented by formula (A):
- CpOqFrRs (A)
- wherein
- R represents H;
- p represents an integer from 2 to 6,
- q is 0,
- r represents an integer from 1 to 12, and
- s represents an integer from 0 to 11, and
- the compound contains one or more unsaturated carbon-carbon bonds;
- and
- (ii) a lubricating oil composition for a refrigerator comprising a base oil containing at least one polyol ester as a main component,
- wherein the polyol ester is an ester of (1) at least one diol or polyol selected from the group consisting of neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, di-(trimethylolpropane), tri-(trimethylolpropane), pentaerythritol, di-(pentaerythritol) and tri-(pentaerythritol), and (2) an aliphatic acid having 3 to 18 carbon atoms.
A method of lubricating a refrigerator comprising incorporating into the refrigerator a composition comprising:
- (i) a refrigerant consisting of an unsaturated fluorinated hydrocarbon compound represented by formula (A):
- CpOqFrRs (A)
- wherein
- R represents H;
- p represents an integer from 2 to 6,
- q is 0,
- r represents an integer from 1 to 12, and
- s represents an integer from 0 to 11, and
- the compound contains one or more unsaturated carbon-carbon bonds;
- and
- (ii) a lubricating oil composition for a refrigerator comprising a base oil containing at least one polyol ester as a main component,
- wherein the polyol ester is an ester of (1) at least one diol or polyol selected from the group consisting of neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, di-(trimethylolpropane), tri-(trimethylolpropane), pentaerythritol, di-(pentaerythritol) and tri-(pentaerythritol), and (2) an aliphatic acid having 3 to 18 carbon atoms.
A refrigerator which comprises a compressor, a condenser, an expansion mechanism and an evaporator and which contains a composition comprising:
- (i) a refrigerant consisting of an unsaturated fluorinated hydrocarbon compound represented by formula (A):
- CpOqFrRs (A)
- wherein
- R represents H;
- p represents an integer from 2 to 6,
- q is 0,
- r represents an integer from 1 to 12, and
- s represents an integer from 0 to 11, and
- the compound contains one or more unsaturated carbon-carbon bonds;
- and
- (ii) a lubricating oil composition for a refrigerator comprising a base oil containing at least one polyol ester as a main component,
- wherein the polyol ester is an ester of (1) at least one diol or polyol selected from the group consisting of neopentyl glycol, trimethylolethane, trimethylolpropane, trimethylolbutane, di-(trimethylolpropane), tri-(trimethylolpropane), pentaerythritol, di-(pentaerythritol) and tri-(pentaerythritol), and (2) an aliphatic acid having 3 to 18 carbon atoms.
Dependencies are inferred from the claim text.