Heat transfer compositions
AssigneeMexichem Fluor S.A. De C.V.
InventorRobert Low
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Abstract
According to the present invention, there is provided a composition comprising 1,1-difluoroethylene (R-1132a), difluoromethane (R-32), 2,3,3,3-tetrafluoropropene (R-1234yf) and carbo dioxide (CO2, R-744). The invention also provides a composition R-1132a, R-32, R-1234yf and at least one compound selected from the group consisting of: pentafluoroethane (R-125), 1,1-difluoroethane (R-152a), 1,1,1,2-tetrafluoroethane (R-134a), trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)) and 1,1,1,2,3,3,3-heptafluoropropane (R-227ea); optionally, the composition comprises at least one further compound selected from the group consisting of trifluoroethylene (R-1123), propane (R-290), propylene (R-1270), isobutane (R-600a) and carbon dioxide (CO2, R-744). The present invention also provides a composition comprising R-1132a, R-32 and R-1234yf.
Claims56
A composition comprising:
- (a) from about 2 to about 15 weight % of 1,1-difluoroethene (R-1132a);
- (b) from about 20 to about 60 weight % of difluoromethane (R-32);
- (c) from about 25 to about 70 weight % of 2,3,3,3-tetrafluoropropene (R-1234yf);
- and
- (d) from about 2 to about 12 weight % of carbon dioxide (CO2, R-744);
- based on the total weight of the composition.
A composition comprising:
- (a) from about 6 to about 18 weight % of 1,1-difluoroethene (R-1132a);
- (b) from about 20 to about 65 weight % of difluoromethane (R-32);
- and
- (c) from about 15 to about 60 weight % of 2,3,3,3-tetrafluoropropene (R-1234A based on the total weight of the composition;
- and
- (d) carbon dioxide (CO2, R-744).
Dependencies are inferred from the claim text.