Fluid polymer polyol dispersions which impart improved fire resistance to polyurethane foam are provided. The fluid polymer polyol dispersions are prepared by grafting one or more monomers onto a polyol backbone with the difference that the grafting takes place in the presence of a flame retardant. During the grafting process the flame retardant is incorporated into the fluid polymer polyol dispersion. When such fluid polymer polyol dispersions are used, the fire resistance of the final polyurethane foam is improved relative to cases where a conventional fluid polymer polyol dispersion and a flame retardant are added separately to the polyurethane foam formulation.
本发明提供了可提高聚
氨酯泡沫塑料耐火性的流体聚合物多元醇分散体。流体聚合物多元醇分散体的制备方法是将一种或多种单体接枝到多元醇骨架上,不同之处在于接枝是在阻燃剂存在的情况下进行的。在接枝过程中,阻燃剂被加入到流体聚合物多元醇分散体中。与在聚
氨酯泡沫配方中单独添加传统的流体聚合物多元醇分散体和阻燃剂的情况相比,使用这种流体聚合物多元醇分散体可提高最终聚
氨酯泡沫的耐火性。