| 摘要 |
Disclosed are mixed halocarbon blowing agents comprising (1) halocarbons boiling below about 10 DEG C., (2) halocarbons boiling between 20 DEG C. and 35 DEG C., and (3) inert organic liquids having a boiling point from about 35 DEG C. to about 125 DEG C. Also disclosed are blends of the above mixed blowing agents with active hydrogen containing compounds, particularly polyols and the rigid closed cell foams prepared from such blends. Up to 60 percent reduction in hard halocarbons is realized with the mixed blowing agents.
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