Liquid polymer/polyols and polyurethane elastomers based thereon

摘要

This invention relates to novel liquid polymer/polyol compositions consisting essentially of: (1) from 45 to 90 wt.% of a polyoxypropylene polyol having a molecular weight of at least 1500 and (2) from 55 to 10 wt.% of an acrylonitrile-styrene polymer consisting essentially of: (a) from 60 to 90 wt.% polymerized acrylonitrile and (b) from 40 to 10 wt.% polymerized styrene, said polymer being in the form of particles that are stably dispersed in the polyol, said composition being essentially free of polymer particles have diameters over 30 microns and said composition having been produced by polymerizing a monomer mixture of acrylonitrile and styrene in the polyol. The novel polymer/polyols are convertible to novel polyurethane foams having high load-bearing properties and to solid polyurethane elastomers having a high modulus.