Process for making a PIPA-polyol
    1.
    发明申请
    Process for making a PIPA-polyol 审中-公开
    制备PIPA-多元醇的方法

    公开(公告)号:US20060058410A1

    公开(公告)日:2006-03-16

    申请号:US11267921

    申请日:2005-11-03

    IPC分类号: C08G18/00

    摘要: Process for preparing a polyol comprising particulate material in dispersed form by reacting an MDI-based polyisocyanate and a polyol having an equivalent weight of up to 400, the reaction being carried out in a polyol having an equivalent weight of 500 or more wherein the polyol having an equivalent weight of 500 or more is a polyoxyethylene polyoxypropylene polyol having an oxyethylene content of 15-49% by weight calculated on the total oxyalkylene groups present wherein 20-80% of the oxyethylenegroups resides at the end of the polymer chains.

    摘要翻译: 通过使基于MDI的多异氰酸酯和当量重量达400的多元醇反应,分散形式的颗粒材料制备多元醇的方法,该反应在当量为500或更大的多元醇中进行,其中多元醇具有 当量为500以上的聚氧亚乙基聚氧丙烯多元醇的氧化乙烯含量为15-49%(重量),其中存在的总氧化烯基团,其中20-80%的氧化乙烯基存在于聚合物链的末端。