Heat Transfer Compositions

摘要

The invention provides a heat transfer composition comprising:
(i) trans-1,3,3,3-tetrafluoropropene (R-1234ze(E));(ii) a second component selected from difluoromethane (R-32), propene (R-1270) propane (R290) and mixtures thereof;(iii) a third component selected from pentafluoroethane (R-125), 1,1,1,2-tetrafluoroethane (R-134a), and mixtures thereof; and optionally(iv) a fourth component selected from fluoroethane (R-161), 1,1-difluoroethane (R-152a) and mixtures thereof.

主权项

1. A heat transfer composition comprising:
from about 5% to about 40% by weight of R-1234ze(E); from about 20% to about 35% by weight R-32; from about 15% to about 30% by weight R-125; and from about 12% to about 50% by weight R-134a.