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:
Aug. 09, 2011
Filed:
Mar. 20, 2007
Kazuo Tagawa, Yokohama, JP;
Ken Sawada, Yokohama, JP;
Yuji Shimomura, Yokohama, JP;
Katsuya Takigawa, Yokohama, JP;
Jiro Hashimoto, Wakayama, JP;
Masataka Negishi, Wakayama, JP;
Kazuo Tagawa, Yokohama, JP;
Ken Sawada, Yokohama, JP;
Yuji Shimomura, Yokohama, JP;
Katsuya Takigawa, Yokohama, JP;
Jiro Hashimoto, Wakayama, JP;
Masataka Negishi, Wakayama, JP;
Nippon Oil Corporation, Tokyo, JP;
Kao Corporation, Tokyo, JP;
Abstract
The base oil for the refrigerating machine oil used with a carbon dioxide refrigerant of the invention is characterized by comprising a complete ester of a fatty acid in which the proportion of C14-C22 branched fatty acid is 40-100% by mole and a polyhydric alcohol. The refrigerating machine oil used with a carbon dioxide refrigerant according to the invention is characterized by comprising the base oil for the refrigerating machine oil used with a carbon dioxide refrigerant according to the invention. The base oil for the refrigerating machine oil used with a carbon dioxide refrigerant and the refrigerating machine oil used with a carbon dioxide refrigerant according to the invention, when used together with a carbon dioxide refrigerant, exhibit excellent stability and electrical insulating properties, and have suitable compatibility with refrigerants while allowing adequate lubricity to be exhibited without increasing the viscosity of the base oil.