| 摘要 |
This disclosure relates to polyisocyanate-based foams, particularly to polyurethane or polyurethane-polyisocyanurate foam prepared in the presence of a certain blowing agent. The blowing agent, based on total amounts of a) and b), consists of: (a) from 5 to 80 mole percent of a C5-6 alicyclic alkane or mixtures of such; and (b) from 95 to 20 mole percent of a mixture of isopentane and n-pentane present in a mole ratio of from 80:20 to 20:80.
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