Refrigerant compositions
US6117356A · kind A · utility
18Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1999 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | May 7, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2205/42
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
?PP A composition is described which comprises carbon dioxide (CO2), at least one hydrofluorocarbon selected from the group consisting of 1,1,1,2tetrafluoroethane (R-134a), 1,1,2,2-tetrafluoroethane (R-134) and 1,1difluoroethane (R-152a), and at least one hydrofluorocarbon selected from the group consisting of 1,1,1,3,3,3-hexafluoropropane (R-236fa) and 1,1,1,2,3,3-hexafluoropropane (R-236ea). The composition may additionally comprise at least one hydrocarbon and can be used as a replacement for refrigerant R-12 in automobile air conditioning and domestic refrigeration systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.