Flame resistant, flexible polyurethane foam - from polyol, poly-isocyanate with high isocyanate content, water, and trimerisation catalyst

摘要

Flexible polyurethane foam is prepd. in the presence of water by reacting (I) an org. cpd. having =2 active H atoms (II) an organic polyisocyanate having an isocyanate no. of 130-225, and (III) a trimerisation catalyst selected from N-benzyltrialkylammonium alcoholates and hydroxides and triethylenediamine and its adducts with alkylene oxides/(water). (I) is pref. a polyalkylene polyether polyol. (IIe is pref. tolylene diisocyanate. (III) is pref. triethylenediamine or one of its adducts with propylene oxide/(water). The foam has excellent resilience, has good fire resistance without addn. of fire-proofing agents, and uses relatively few reactants.