MIXTURES CONTAINING 1.1.1.4.4.4.- HEXAFLUOROBUTENE AND 1-CHLORO-3.3.3-TRIFLUOROPROPENE

1 . A blowing agent composition comprising:

1,1,1,3,3,3-hexafluorobutene (1336mzzm);

1-chloro-3,3,3-trifluoropropene (1233zd); and

optionally at least one adjuvant selected from the group consisting of co-blowing agent(s), polyol(s), surfactant(s), polymer modifier(s), colorant(s), dye(s), solubility enhancer(s), flammability suppressant(s), flame retardants(s), antibacterial agent(s), viscosity reduction modifier(s), filler(s), vapor pressure modifier(s), nucleating agent(s), catalyst(s) and combination of any two or more of these.

2 . The blowing agent of claim 1 wherein said 1-chloro-3,3,3-trifluoropropene (1233zd) comprises trans-1-chloro-3,3,3-trifluoropropene.

3 . The blowing agent of claim 1 wherein said 1-chloro-3,3,3-trifluoropropene (1233zd) comprises from about 50 weight percent to about 100 weight percent trans-1-chloro-3,3,3-trifluoropropene and from about 0 weight percent to about 50 weight percent cis-1-chloro-3,3,3-trifluoropropene.

4 . The blowing agent of claim 1 wherein said 1-chloro-3,3,3-trifluoropropene (1233zd) comprises from about 75 weight percent to about 100 weight percent trans-1-chloro-3,3,3-trifluoropropene and from about 0 weight percent to about 25 weight percent cis-1-chloro-3,3,3-trifluoropropene.

5 . The blowing agent of claims 1 wherein said 1-chloro-3,3,3-trifluoropropene (1233zd) comprises from about 90 weight percent to about 100 weight percent trans-1-chloro-3,3,3-trifluoropropene and from about 0 weight percent to about 10 weight percent cis-1-chloro-3,3,3-trifluoropropene.

6 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene (1336mzzm) comprises cis-1,1,1,3,3,3-hexafluorobutene.

7 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene (1336mzzm) comprises from about 50 weight percent to about 100 weight percent cis-1,1,1,3,3,3-hexafluorobutene and from about 0 weight percent to about 50 weight percent trans-1,1,1,3,3,3-hexafluorobutene.

8 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene (1336mzzm) comprises from about 75 weight percent to about 100 weight percent cis-1,1,1,3,3,3-hexafluorobutene and from about 0 weight percent to about 25 weight percent trans-1,1,1,3,3,3-hexafluorobutene.

9 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene (1336mzzm) comprises from about 90 weight percent to about 100 weight percent cis-1,1,1,3,3,3-hexafluorobutene and from about 0 weight percent to about 10 weight percent trans-1,1,1,3,3,3-hexafluorobutene.

10 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene is provided in an amount from about 5 to about 70 mole percent and said 1-chloro-3,3,3-trifluoropropene is provided in an amount from about 30 to about 95 mole percent.

11 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene is provided in an amount from about 30 to about 70 mole percent and said 1-chloro-3,3,3-trifluoropropene is provided in an amount from about 30 to about 70 mole percent.

12 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene is provided in an amount from about 40 to about 60 mole percent and said 1-chloro-3,3,3-trifluoropropene is provided in an amount from about 40 to about 60 mole percent.

13 . The blowing agent of claim 1 wherein said 1,1,1,3,3,3-hexafluorobutene is provided in an amount of about 50 mole percent and said 1-chloro-3,3,3-trifluoropropene is provided in an amount of about 50 mole percent.

14 . The blowing agent of claim 1 wherein said adjuvant comprises at least one co-blowing agent selected from the group consisting of water, CO2, CFCs, HCCs, HCFCs, C1-05 alcohols, C1-C4 aldehydes, C1-C4 ketones, C1-C4 ethers and diethers, organic acids, and combinations of two or more of these.

15 . The blowing agent of claim 1 wherein said adjuvant comprises water as at least one co-blowing agent.

16 . A foamable composition comprising a foam forming agent and the blowing agent composition of claim 1 .

17 . The foamable composition of claim 16 wherein the foamable composition exhibits an initial k-factor (BTU in/hr ft 2 ° F.) at 40° F. of not greater than about 0.14.

18 . A foam premix composition comprising polyol and the blowing agent composition of claim 1 .

19 . A method of forming a foam comprising adding to foaming composition the blowing agent composition of claim 1 .

20 . A foam comprising a plurality of polymeric cells and the blowing agent composition of claim 1 .