| 摘要 |
The present invention relates to a polyisocyanate-based foam prepared in the presence of a blowing agent which comprises from 50 to 95 parts be weight 1,1,1,2-tetrafluoroethane (134a) and from 5 to 50 parts by weight of 1,1,1,3,3-pentafluoro-propane (245fa). Use of such a blowing agent composition provides for foam with a reduced smoke emission index. |
