USE OF LOW UNSATURATED POLYETHER POLYOLS IN SLABSTOCK FOAM APPLICATIONS

摘要

The present invention discloses a method for the formation of and a flexible slabstock polyurethane foam having substantially improved indention force deflection and resilience characteristics while maintaining the other physical properties. The method comprises the steps of: forming a blend of three polyols, each having a plurality of ethylene oxide caps of from 5-25 % by weight based on weight of the polyol, by combining at least one polyether polyol having low unsaturation and a molecular weight no less than 4000 Daltons; at least one graft polyether polyol having an equivalennt weight no less than 1000 Daltons and a solids content of at least 28 %; and at least one polyether polyol having an unsaturation no greater than 0.018 meq/g KOH; providing at least one polyisocyanate component, a catalyst, 3-7 % by weight of water as a blowing magnet; and combining the components to form a slabstock polyurethane foam.