The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 2005
Filed:
Mar. 01, 2000
Shuichi Sakanoue, Ichihara, JP;
Masahiko Takesue, Ichihara, JP;
Youichiro Jido, Ichihara, JP;
Minoru Takagi, Tokyo, JP;
Shoichi Tominaga, Tokyo, JP;
Hiroshi Nagakawa, Chiba, JP;
Shuichi Sakanoue, Ichihara, JP;
Masahiko Takesue, Ichihara, JP;
Youichiro Jido, Ichihara, JP;
Minoru Takagi, Tokyo, JP;
Shoichi Tominaga, Tokyo, JP;
Hiroshi Nagakawa, Chiba, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
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.