BLOWING AGENT BLENDS AND USE THEREOF IN THE PREPARATION OF POLYISOCYANATE-BASED FOAMS

摘要

Blowing agent, active hydrogen-containing compositions, commonly referred to as B-side compositions or blends, and their use for the production of polyurethane and polyisocyanurate foams are disclosed. More particularly, the disclosure relates to blowing agent blend, foaming process and polyisocyanate-based foams which utilize environmentally friendly blowing agent compositions comprising a major proportion of 1,1,2,2-tetrafluoroethane (HFC-134).