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    • 2. 发明授权
    • 고도로안정하고미분이며저점도이고평균입도가작은폴리올중합체의연속제조방법
    • KR100433147B1
    • 2004-09-24
    • KR1019960044861
    • 1996-10-09
    • 바이엘 악티엔게젤샤프트
    • 크라츠,마르크,에르.디트리히,만프레트하이네만,토르스텐야콥스,군돌프산더스,요세프보이나르,헬무트
    • C08F283/06C08F290/04
    • C08G18/635C08F290/02C08G2101/0008C08G2101/0016
    • A continuous process for the preparation of highly stable, finely divided, low viscosity polymer polyols of small average particle size wherein in the first step an intermediate is prepared by reacting (1) a mixture of styrene and acrylonitrile in a mixture of (2) a polyoxyalkylene polyether polyol and (3) a macromer in the presence of (4) a free radical initiator, (5) a solvent having moderate chain transfer activity and optionally (6) a reaction moderator at a temperature of at least 100 DEG C, such that the intermediate contains a high level of macromer, at least about 12% and preferably at least about 15% with respect to the polyol mixture and the solids content of the intermediate is less than about 30%, preferably less than about 25% and at least about 15% by weight. The intermediate, which functions as a seed for further polymerization, is then further reacted in one or more stirred-tank reactors in series with a mixture of styrene and acrylonitrile in a polyol and optionally a macromer, in the presence of solvent, initiator and a reaction moderator which are distributed among the remaining reactors.
    • 制备小平均粒度的高度稳定的,细分散的低粘度聚合物多元醇的连续方法,其中在第一步中通过使(1)苯乙烯和丙烯腈的混合物在(2)a (4)自由基引发剂存在下,(5)具有中等链转移活性的溶剂和任选(6)反应调节剂在至少100℃的温度下,例如聚氧化亚烷基聚醚多元醇和 中间体含有高含量的大分子单体,相对于多元醇混合物至少约12%,优选至少约15%,并且中间体的固体含量小于约30%,优选小于约25%,并且在 至少约15重量%。 然后在一个或多个搅拌釜反应器中,使作为用于进一步聚合的种子的中间体进一步在苯乙烯和丙烯腈在多元醇和任选的大分子单体中的混合物中,在溶剂,引发剂和 反应调节剂,它们分布在其余的反应器中。