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US 8,894,874 B2Granted
Heat transfer compositions
AssigneeMexichem Amanco Holding S.A. de C.V.
InventorRobert E. Low
Life of this patent
Estimating the term…
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.
Claims47
A heat transfer composition consisting essentially of
- (i) from about 58 to about 70% by weight R-1234yf;
- (ii) from about 25 to about 38% by weight R-134a;
- and
- (iii) from about 2 to about 10% by weight R-32.
1 more element
Dependencies are inferred from the claim text.