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AssigneeIdemitsu Kosan Co., Ltd.
InventorsShuichi Sakanoue, Masahiko Takesue, Youichiro Jido, Minoru Takagi, Shoichi Tominaga, Hiroshi Nagakawa
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The invention provides a refrigerator oil composition comprising a base oil of a mineral oil and/or a synthetic oil, and containing (a) a partial ester of a polyalcohol and a fatty acid and (b) an acid phosphate or its amine salt; and a refrigerator oil composition comprising a base oil of a mineral oil and/or a synthetic oil, and containing any of (a) acid phosphates or their amine salts, (b) acetylene glycol alkylene oxide adducts, (c) potassium salts of fatty acids, etc., (d) organic acids, and (e) fatty acid amides. The refrigerator oil compositions have good lubricity and are especially effective for reducing the friction in both the oil region and the extreme-pressure region in the sliding area between aluminium materials and steel materials.
A refrigerator oil composition comprising a polyvinyl ether as a base oil, and containing, based on the total amount of the composition, (a) from 0.01 to 5% by weight of a partial ester of a polyalcohol and a fatty acid, and (b) from 0.001 to 1% by weight of an acid phosphate or its amine salt, wherein the acid phosphate is an orthophosphate of the following formula (I) or (II):
A refrigerator oil composition comprising a base oil of a mineral oil and/or a synthetic oil, and containing at least one compound selected from the group consisting of (a) acid phosphates or their amine salts, (b) acetylene glycol alkylene oxide adducts, (c) potassium or sodium salts of fatty acids, (d) organic acids of the following general formula (XXXIV):
Dependencies are inferred from the claim text.