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    Process for polymerizing isocyanates
    34.
    发明授权
    Process for polymerizing isocyanates 失效
    聚合异氰酸酯的方法

    公开(公告)号：US5770671A

    公开(公告)日：1998-06-23

    申请号：US905256

    申请日：1997-08-01

    申请人： Hartmut Nefzger ,  Bernd Quiring

    发明人： Hartmut Nefzger ,  Bernd Quiring

    IPC分类号： C08G18/16 ,  C08G18/10 ,  C08G18/22

    CPC分类号： C08G18/10

    摘要： Isocyanates are polymerized in a simple manner by polymerizing aliphatic and/or aromatic isocyanates in the presence of metallocenes at temperatures from 20.degree. to 220.degree. C., optionally subject to increased or reduced pressure and optionally in the presence of an inert organic solvent, the metallocene being used in an amount of 5 to 50,000 ppm relative to the amount of isocyanates used.

    摘要翻译： 异氰酸酯通过在金属茂存在下在20℃至220℃的温度下聚合脂族和/或芳族异氰酸酯，任选地经受增加或降低的压力以及任选在惰性有机溶剂存在下，以简单的方式聚合， 茂金属相对于所用的异氰酸酯的用量为5〜50,000ppm。

    Process for the production of compounds containing hydroxyl groups from (polyurethane) polyurea waste materials
    35.
    发明授权
    Process for the production of compounds containing hydroxyl groups from (polyurethane) polyurea waste materials 失效
    从（聚氨酯）聚脲废料生产含羟基的化合物的方法

    公开(公告)号：US5508312A

    公开(公告)日：1996-04-16

    申请号：US429411

    申请日：1995-04-26

    申请人： Thomas Munzmay ,  Hartmut Nefzger ,  Werner Rasshofer ,  Walter Meckel

    发明人： Thomas Munzmay ,  Hartmut Nefzger ,  Werner Rasshofer ,  Walter Meckel

    IPC分类号： C08J11/24 ,  C08G18/65 ,  C08G18/83 ,  C08J11/18 ,  C08J11/28 ,  C08L75/00 ,  C08J11/04

    CPC分类号： C08J11/18 ,  C08J2375/04 ,  Y02W30/706

    摘要： Compounds containing hydroxyl groups, which are suitable for the polyisocyanate addition polymerization process, are prepared from polyurethane-polyurea and/or polyurea waste materials. These compounds are produced by reacting a finely divided polyurethane-polyurea and/or polyurea waste material with a low molecular weight diol and/or polyol (and optionally a higher molecular weight polyol) and a low molecular weight urea and/or carbamic acid ester. This reaction may be carried in either one stage or two stages. In the two stage process, the waste material and diol/polyol are reacted in a first stage at a temperature of from about 100 to about 260.degree. C. In the second stage, the amine-containing alcoholysis product obtained in the first stage is reacted with a low molecular weight urea and/or carbamic acid ester. In the single stage process, the polyurethane-polyurea and/or polyurea waste material is reacted with a low molecular weight diol and/or polyol in the presence of a low molecular weight urea and/or carbamic acid ester.

    摘要翻译： 含有羟基的化合物，适用于多异氰酸酯加成聚合方法，由聚氨酯 - 聚脲和/或聚脲废料制备。 这些化合物通过使细分散的聚氨酯 - 聚脲和/或聚脲废料与低分子量二醇和/或多元醇（和任选的较高分子量的多元醇）和低分子量的脲和/或氨基甲酸酯反应来制备。 该反应可以在一个阶段或两个阶段中进行。 在二阶段工艺中，废料和二醇/多元醇在约100至约260℃的温度下在第一阶段中反应。在第二阶段中，使第一阶段获得的含胺醇解产物反应 与低分子量尿素和/或氨基甲酸酯。 在单阶段方法中，聚氨酯 - 聚脲和/或聚脲废料在低分子量脲和/或氨基甲酸酯的存在下与低分子量二元醇和/或多元醇反应。