Compositions – Vaporization – or expansion – refrigeration or heat or energy...
Reexamination Certificate
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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Bement Leslie Bruce
Bogdan Mary Charlotte
Decaire Barbara Ruth
Kieta Harold John
Konopa Dennis Paul
Szuch Colleen D.
Zemel Irina S
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