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. 21, 2018
Filed:
Feb. 02, 2015
Jxtg Nippon Oil & Energy Corporation, Chiyoda-ku, Tokyo, JP;
Hitoshi Takahashi, Tokyo, JP;
Tsutomu Takahashi, Tokyo, JP;
Takeshi Okido, Tokyo, JP;
Hiroko Shimpo, Tokyo, JP;
Souichirou Konno, Tokyo, JP;
JXTG Nippon Oil & Energy Corporation, Tokyo, JP;
Abstract
The present invention provides a refrigerating machine oil comprising a polyvinylether having a structural unit represented by the following formula (1): wherein R, R, and Rmay be the same or different from each other and each represent a hydrogen atom or a hydrocarbon group, Rrepresents a divalent hydrocarbon group or an ethereal oxygen-containing divalent hydrocarbon group, Rrepresents a hydrocarbon group, m represents an integer of 0 or more, and in the case where m is 2 or more, a plurality of Rmay be the same or different from each other, a number average molecular weight Mn is 500 or more and 2000 or less, a ratio of a weight average molecular weight Mw to a number average molecular weight Mn, Mw/Mn, is 1.10 or more and 1.25 or less, and the refrigerating machine oil is used with a mildly flammable hydrofluorocarbon refrigerant.