METHOD TO PRODUCE FROTH FOAM

1 . A method for the generation of a foam comprising:

(a) preparing an A component, which comprises an isocyanate;

(b) preparing a B component, which comprises an isocyanate-reactive compound, and

(c) generating a foam by mixing the A component and the B component at a low pressure;

wherein the A component or the B component or both further comprise a blowing agent comprising E-1,1,1,4,4,4-hexafluoro-2-butene (E-HFO-1336mzz) and one or more of a co-blowing agent chosen from carbon dioxide, nitrogen, or 1,1-difluoroethane (HFC-152a);

and wherein the low pressure is at least about 50 psi and up to about 500 psi (at least about 0.34 up to about 3.4 MPa).

2 . The method of claim 1 wherein the A component comprises E-1,3,3,3-tetrafluoropropene (E-HFO-1234ze) and the B component comprises E-HFO-1336mzz.

3 . The method of claim 1 wherein Z-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzz) is added to the A component or the B component or both.

4 - 6 . (canceled)

7 . The method of claim 2 wherein the A component and the B component are provided in separate pressurized cylinders and the amount of co-blowing agent added to each cylinder is sufficient to equalize pressure in both cylinders.

8 . The method of claim 3 , wherein prior to dispensing, one or both cylinders are pressurized with a co-blowing agent, to achieve a pressure of at least 50 psi (0.34 MPa).

9 . (canceled)

10 . The method of claim 1 wherein methyl formate or water is added to the A component or the B component or both.

11 - 16 . (canceled)

17 . The method of claim 1 wherein the low pressure is from about 100 psi and up to about 400 psi (from about 0.69 MPa and up to about 2.76 MPa).

18 . (canceled)

19 . The method of claim 1 wherein the amount E-HFO-1336mzz in the B component is about 5% to about 20%, or about 5% to about 15%, or about 5% to about 10%, or about 10% to about 15% by weight of the B component.

20 . The method of claim 1 wherein the amount E-HFO-1336mzz in the A component is between about 0% and about 15% by weight of the A component, or about 5% to about 20%, or about 5% to about 15%, or about 5% to about 10%, or about 10% to about 15% by weight of the A component.

21 . The method of claim 1 wherein the amount the amount of co-blowing agent in the B component is about 0.1% to about 2%.

22 - 33 . (canceled)

34 . A polyurethane froth foam kit comprising:

(a) a cylinder comprising an A component, which comprises an isocyanate;

(b) a cylinder comprising a B component, which comprises an isocyanate-reactive compound;

(c) a low pressure mixer having a mixing chamber and a spray nozzle;

wherein E-1,1,1,4,4,4-hexafluoro-2-butene (E-HFO-1336mzz) and one or more of a co-blowing agent chosen from carbon dioxide, nitrogen, or 1,1-difluoroethane (HFC-152a) are added to the A component, the B component, or both; and

wherein the A component and the B component are provided in separate pressurized cylinders.

35 - 39 . (canceled)

40 . A foamable composition comprising: (a) a blowing agent comprising E-1,1,1,4,4,4-hexafluoro-2-butene (E-HFO-1336mzz); (b) one or more of a co-blowing agent chosen from carbon dioxide, nitrogen, or 1,1-difluoroethane (HFC-152a); (c) an isocyanate; (d) a polyol; (e) a catalyst; and (f) a surfactant.

41 . The foamable composition of claim 40 wherein the composition comprises E-HFO-1234ze.

42 . The foamable composition of claim 40 , wherein the total amount of blowing agent comprising E-HFO-1336mzz and the one or more of a co-blowing agent chosen from carbon dioxide, nitrogen, or 1,1-difluoroethane comprises between about 5% and about 15% by weight of the foamable composition.

43 . (canceled)

44 . The foamable composition of claim 40 , further comprising Z-HFO-1336mzz.

45 - 48 . (canceled)