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    Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content
    1.
    发明授权
    Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content 失效
    制备二氯甲烷二异氰酸酯和聚苯基多亚甲基多异氰酸酯的混合物，其具有降低的碘色数和降低的氯含量

    公开(公告)号：US06229043B1

    公开(公告)日：2001-05-08

    申请号：US08675428

    申请日：1996-06-26

    申请人： Dietrich Scherzer ,  Bernd Bruchmann ,  Roland Minges ,  Peter Keller ,  Willy van Pee ,  Wolfgang Heider ,  Siegmund Pohl ,  Bernhard Otto ,  Paul Jacobs ,  Wilfried Seyfert

    发明人： Dietrich Scherzer ,  Bernd Bruchmann ,  Roland Minges ,  Peter Keller ,  Willy van Pee ,  Wolfgang Heider ,  Siegmund Pohl ,  Bernhard Otto ,  Paul Jacobs ,  Wilfried Seyfert

    IPC分类号： C07C24914

    CPC分类号： C07C263/10 ,  C08G18/7664 ,  C08G18/8019 ,  C07C265/14

    摘要： Mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (raw MDI) having a reduced iodine color number and a reduced chlorine content are prepared by reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, and then, after phosgenation is complete, incorporating into the reaction mixture, in the presence or absence of the phosgene, a mixture of water and at least one monohydric or polyhydric polyoxyalkylene alcohol, preferably having a functionality of from 2 to 3, and advantageously having a hydroxyl number of from 20 to 1800, in an effective amount which advantageously comprises from more than 0.01 to 0.3% by weight of water (i) and from 0.5 to 5% by weight of a polyoxyalkylene alcohol (ii), in each case based on the weight of raw MDI, then removing the excess phosgene or the phosgene residues still present and the inert organic solvent, if desired adding to the reaction product up to 5% by weight, based on the weight of raw MDI, of at least one antioxidant based on phenol and/or aryl phosphite and thermally treating the reaction mixture.

    摘要翻译： 通过在高温下，在至少一种惰性有机溶剂的存在下，使二苯基甲烷二胺和多苯基多亚甲基多胺与云气的相应混合物反应，制备具有降低的碘色数和降低的氯含量的二苯基甲烷二异氰酸酯和聚苯基多亚甲基多异氰酸酯（原MDI）的混合物， 然后，在光气化完成后，在光气存在或不存在下将反应混合物加入到水和至少一种一元或多元聚氧化烯醇的混合物中，优选具有2至3的官能度，并且有利地具有 羟基数为20至1800，其有效量包含大于0.01至0.3重量％的水（i）和0.5至5重量％的聚氧化烯醇（ii），在每种情况下基于 原料MDI的重量，然后除去过剩的光气或仍然存在的光气残余物 t有机溶剂，如果需要，加入反应产物至多5重量％，基于原料MDI的重量，至少一种基于酚和/或亚磷酸芳基酯的抗氧化剂，并热处理反应混合物。

    Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number
    2.
    发明授权
    Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number 失效
    二苯甲基二异氰酸酯和具有降低的碘颜色数的聚苯乙烯聚异氰酸酯的混合物的制备

    公开(公告)号：US5207942A

    公开(公告)日：1993-05-04

    申请号：US653566

    申请日：1991-02-08

    申请人： Dietrich Scherzer ,  Roland Minges ,  Werner Langer ,  Bernd Bruchmann ,  Wolfgang Heider ,  Peter Keller ,  Arnold Schmitt ,  Willy Van Pee

    发明人： Dietrich Scherzer ,  Roland Minges ,  Werner Langer ,  Bernd Bruchmann ,  Wolfgang Heider ,  Peter Keller ,  Arnold Schmitt ,  Willy Van Pee

    IPC分类号： C07C263/18 ,  C07C263/20 ,  C07C265/14

    CPC分类号： C07C263/18 ,  C07C263/20

    摘要： Mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (crude MDI) having a reduced iodine color number are prepared by reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylene-polyamines with phosgene in the presence of one or more inert organic solvents at elevated temperatures by a process in which low molecular weight alkanols, polyhydric alcohols, preferably dihydric to octahydric alcohols having a molecular weight of from 60 to 350, or mixtures thereof are incorporated in an effective amount, advantageously in an amount of from 0.01 to 5% by weight, based on the weight of crude MDI, into the reaction mixture after the end of the phosgenation, the phosgene and the inert organic solvent are then separated off, from 0 to 5% by weight, based on the weight of crude MDI, of one or more phenol-based antioxidants and/or aryl phosphite are added to the reaction product, and the reaction mixture is subjected to a thermal treatment.

    摘要翻译： 通过在一个或多个惰性有机溶剂的存在下，在高温下使二苯基甲烷二胺和聚苯基聚亚甲基 - 多胺的相应混合物与光气反应来制备具有降低的碘色数的二苯基甲烷二异氰酸酯和聚苯基聚亚甲基多异氰酸酯（粗MDI）的混合物， 低分子量链烷醇，多元醇，优选分子量为60至350的二元至八元醇或其混合物以有效量引入，有效量为基于重量的0.01至5重量％ 的粗MDI，在光气化结束后进入反应混合物中，然后分离出光气和惰性有机溶剂，基于粗MDI的重量计，0至5重量％的一种或多种酚基 将抗氧化剂和/或亚磷酸芳基酯加入到反应产物中，并将反应混合物进行热处理 音乐

    Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates of reduced iodine color number
    3.
    发明授权
    Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates of reduced iodine color number 失效
    二氯甲烷二异氰酸酯和聚苯乙烯聚异氰酸酯的还原碘颜料数量的混合物的制备

    公开(公告)号：US5208368A

    公开(公告)日：1993-05-04

    申请号：US723133

    申请日：1991-06-28

    申请人： Dietrich Scherzer ,  Roland Minges ,  Bernd Bruchmann ,  Wolfgang Heider ,  Willy van Pee ,  Peter Keller

    发明人： Dietrich Scherzer ,  Roland Minges ,  Bernd Bruchmann ,  Wolfgang Heider ,  Willy van Pee ,  Peter Keller

    IPC分类号： C07C263/10 ,  C07C263/18 ,  C07C263/20 ,  C07C265/14 ,  C08G18/76

    CPC分类号： C07C263/18 ,  C08G18/3206 ,  C08G18/48 ,  C08G18/7664

    摘要： Mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (crude MDI) of reduced iodine color number are prepared by reacting the corresponding mixtures of diphenylmethanediamines and polyphenylpolymethylenepolyamines with phosgene in the presence of at least one inert organic solvent at elevated temperature, at least one monohydric or polyhydric polyoxyalkylene alcohol, preferably having a functionality of from 2 to 3, and advantageously having a hydroxyl number of from 20 to 1800, or mixtures thereof in an effective amount, expediently in an amount of from 0.1 to 10% by weight, based on the weight of the crude MDI, being introduced into the reaction mixture when the phosgenation is complete, the phosgene and the inert organic solvent then being removed, up to 5% by weight, based on the weight of crude MDI, of at least one phenol-based antioxidant and/or aryl phosphite being added, if desired to the reaction product, and the reaction mixture being heated.

    摘要翻译： 通过在至少一种惰性有机溶剂的存在下，在升高的温度下使相应的二苯基甲烷二胺和多苯基多亚甲基多胺与碳酰氯的混合物反应制备二苯基甲烷二异氰酸酯和聚苯基多亚甲基多异氰酸酯（粗MDI）的混合物，至少一种一元或多元聚氧化烯 醇，优选具有2至3的官能度，有利地具有20至1800的羟值，或其有效量的混合物，有利的量为0.1至10重量％，基于 当完成光气化时，将粗MDI加入到反应混合物中，然后除去光气和惰性有机溶剂至多5重量％，基于粗MDI的重量计至少一种酚类抗氧化剂 和/或亚磷酸芳基酯，如果需要加入到反应产物中，并且反应混合物被加热。