AQUEOUS WAX DISPERSIONS AS CELL OPENERS IN MAKING POLYURETHANE FLEXIBLE FOAMS

摘要

The present invention provides a process for preparing a soft or semi-soft polyurethane foam by reacting an organic polyisocyanate with a polyol in the presence of a urethane catalyst, water as the blowing agent, any silicone surfactant, and a bubble continuum agent. An aqueous dispersion of particles comprising a wax material and an optional emulsifier, wherein at least 35% of the particles have a size of 0.2-5 microns and a melting point of 0 ° C.-55 ° C. below the maximum exothermic temperature of the foam. It is about a method.