Heat transfer compositions
US9074115B2 · kind B2 · utility
6Cited by
6References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 2014 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Nov 25, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/121
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The invention provides a heat transfer composition comprising (i) from about 45 to about 75% by weight 2,3,3,3-tetrafluoropropene (R-1234yf); and (ii) from about 25 to about 55% by weight 1,1,1,2-tetrafluoroethane (R-134a). A heat transfer composition comprising, optionally consisting essentially of, (i) from about 20 to about 90% by weight R-1234yf; (ii) from about 10 to about 60% by weight R-134a; and (iii) from about 1 to about 20% by weight R-32 is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.