Heat transfer compositions
US8894874B2 · kind B2 · utility
8Cited by
3References
47Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 16, 2010 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Apr 24, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.