abstract |
A composition which is a blowing agent which comprises from about 75% to about 90% by weight trans-1,3,3,3--tetrafluoropropene, from about 1% to about 15% by weight cis-1,3,3,3-tetrafluoropropene, and from about 1% about 15% by weight 1,1,3,3,3-pentafluoropropane. |