| abstract |
The invention consists essentially of about 62 to about 78 weight percent of trans-1,3,3,3-tetrafluoropropene (R-1234ze (E)) and about 1,1-difluoroethane (R-152a) It provides a heat transfer composition consisting of 22 to about 38% by weight. The present invention also provides a heat transfer composition comprising about 20 to about 40 weight percent R-152a, about 5 to about 55 weight percent R-134a, and about 5 to about 75 weight percent R-1234ze (E). |