Hydrofluorocarbon blown foam and method for preparation thereof

Details Hydrofluorocarbon blown foam and method for preparation thereof Hydrofluorocarbon blown foam and method for preparation thereof

2007-10-30

2007-10-30

Zemel, Irina S (Department: 1711)

Compositions

Vaporization, or expansion, refrigeration or heat or energy...

C252S068000, C252S069000, C521S117000, C521S131000, C521S133000

Reexamination Certificate

active

10350846

ABSTRACT:
The invention relates to the addition of α-methyl styrene, isobutanol and/or isopropanol to reduce vapor pressure, improve k-factor, enhance the solubility of the blowing agent in the premix and/or improve the processing characteristics of polyurethane and polyisocyanurate closed-cell foams prepared with a blowing agent comprising a hydrofluorocarbon selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,2-tetrafluoroethane, 1,1,2,2-tetrafluoroethane, and mixtures thereof.

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