POLY(OXYPROPYLENE/OXYETHYLENE) RANDOM POLYOLS USEFUL IN PREPARING FLEXIBLE HIGH RESILIENCE FOAM WITH REDUCED TENDENCIES TOWARD SHRINKAGE AND FOAM PREPARED THEREWITH

摘要

High resilience polyurethane foams exhibiting little or no shrinkage may beprepared from low unsaturation double metal cyanidecatalyzed polyoxyalkylene polyols in amounts greater than 20 weight percent ofthe total polyol component, when low unsaturationpoly(oxypropylene/oxyethylene) random polyols having less than 35 weightpercent of an all polyoxypropylene block catalyzed by doublemetal cyanide catalysts and one or more external randompolyoxypropylene/polyoxyethylene blocks each containing 2 weight percent ormore oxyethylene moieties, and an unsaturation of less than 0.02 meq/g areemployed.