Process for preparing water-blown polyurethane foams, process for preparing rigid polyurethane foam, process for preparing flexible polyurethane foam and compositions for these processes

摘要

The present invention relates to a process for preparing water-blown polyurethane foams by reacting a polyisocyanate and a polyol in the presence of water and a tin salt of a carboxylic acid having 2 to 18 carbon atoms, hereinafter called catalyst 1, together with a lithium, sodium,