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Heat transfer compositions

  • US 8,999,190 B2
  • Filed: 12/18/2012
  • Issued: 04/07/2015
  • Est. Priority Date: 10/12/2007
  • Status: Active Grant
First Claim
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1. A heat transfer composition comprising 30-90% by weight trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), R-32 and 10-50% by weight 1,1,1,2-tetrafluoroethane (R-134a), wherein the composition comprises substantially no R-1243zf.

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