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High styrene content stable polymer polyols using epoxy resin-modified polyols as dispersants
High styrene content stable polymer polyols using epoxy resin-modified polyols as dispersants
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机译:使用苯乙烯改性的多元醇作为分散剂的高苯乙烯含量稳定的聚合物多元醇
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摘要
Very low viscosity polymer polyols having high styrene/acrylonitrile ratios and good stability are obtained by a process comprising polymerising, via a free-radical reaction, a monomer component, in the presence of a polyol mixture comprising a major portion of a base polyol unmodified with epoxy resin and a minor portion of an epoxy resin-modified polyol as a dispersant. The epoxy resin-modified polyols useful as dispersants may be made by reacting a polyol initiator having an active hydrogen functionality of 3 to 8 and one or more alkylene oxides with an epoxy resin. It is preferred that all of the epoxy resin-modified base polyol dispersant be initially charged to the reactor, along with part of the base polyol.
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