Refrigerator oil, and working fluid composition for refrigerators
US10053644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2015 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Feb 2, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a refrigerating machine oil comprising a polyvinylether having a structural unit represented by the following formula (1): wherein R1, R2, and R3 may be the same or different from each other and each represent a hydrogen atom or a hydrocarbon group, R4 represents a divalent hydrocarbon group or an ethereal oxygen-containing divalent hydrocarbon group, R5 represents a hydrocarbon group, m represents an integer of 0 or more, and in the case where m is 2 or more, a plurality of R4 may 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.