Refrigerating compositions based on fluoroethers and difluoromethane
US6337033B2 · kind B2 · utility
1Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1998 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | Jul 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2205/43
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Azeotropic or near-azeotropic composition essentially consisting of:35-99.1% by weight of CH2F2 (R 32), difluoromethane,0.1-65% by weight of CHF2—O—CF3, 1,1,1,2,2,-pentafluorodimethylether.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.