| 摘要 |
<p>The invention relates to the addition of agr; 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.</p> |
