Composite polymers, especially composite polyols containing active hydrogen atoms can be prepared by polymerizing one or more olefinically unsaturated compounds in the presence of a liquid polymer containing active hydrogen atoms and a modified initiator; the modification comprising the reaction between a liquid polymer containing one or more groups which can react with isocyanate groups and a compound containing two or more isocyanate groups which has been partially converted by reacting it with an organic hydroperoxide or a free-radical initiator also containing additional active hydrogen atoms. The composite polymers exhibit a stable dispersed polymer phase and can be suitably applied as starting materials for polyurethane foams.
复合聚合物,特别是含有活性氢原子的复合多元醇,可以在含有活性氢原子的液态聚合物和改性
引发剂的存在下,通过聚合一种或多种烯烃不饱和化合物来制备;改性包括含有一个或多个可与
异氰酸酯基团反应的基团的液态聚合物和含有两个或多个
异氰酸酯基团的化合物之间的反应,后者已通过与有机
过氧化氢或也含有额外活性氢原子的自由基
引发剂反应而部分转化。这种复合聚合物具有稳定的分散聚合物相,可用作聚
氨酯泡沫的起始材料。