Epoxy modified polyols as dispersants for high styrene, high solids content polymer polyols

摘要: Very low viscosity polymer polyols having high styrene/acrylonitrile ratios and good stability may be achieved by the use of epoxy modified as dispersants. The useful dispersants made one three methods: (1) adding resin internally to polyol, (2) capping or coupling a polyol not containing an with such resin, (3) providing both cap coupler. Epoxy hydroxyl ratio about 6.8 less, these techniques, are superior provide higher styrene contents, improved properties. In aspect, contain significant amount molecular weight adducts; generally from 5 30 wt.% materials GPC greater than 100,000; at least 80,000. Base unmodified used make polyols.