知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

6 条记录 (耗时 0.011 秒)

    Production of di- and polyisocyanates of the diphenylmethane series with defined acidity
    3.
    发明申请
    Production of di- and polyisocyanates of the diphenylmethane series with defined acidity 有权
    生产具有确定酸度的二苯基甲烷系列的二异氰酸酯和多异氰酸酯

    公开(公告)号：US20050240054A1

    公开(公告)日：2005-10-27

    申请号：US11048667

    申请日：2005-02-01

    申请人： Ulrich Liman ,  Heinz-Herbert Muller ,  Robert Vieler ,  Ralf Echterhoff

    发明人： Ulrich Liman ,  Heinz-Herbert Muller ,  Robert Vieler ,  Ralf Echterhoff

    IPC分类号： C07C263/10 ,  C07C263/20 ,  C07C265/14 ,  C08G18/02 ,  C08G18/08 ,  C08G18/76

    CPC分类号： C07C263/10 ,  C07C263/20 ,  C08G18/7664 ,  C07C265/14

    摘要： The invention relates to a process for the production of di- and polyisocyanates of the diphenylmethane series and mixtures thereof, in which aniline and formaldehyde are reacted in the presence of an acid catalyst to form di- and polyamines of the diphenylmethane series; the di- and polyamines of the diphenylmethane series are phosgenated, optionally in the presence of a solvent, to obtain a crude di- and polyisocyanate; from the crude di- and polyisocyanate, at least one fraction containing at least 5 wt. % 3-ring and multi-ring MDI and at least one fraction containing at least 95 wt. % 2-ring MDI are separated by distillation, and the acidities of the fraction containing at least 5 wt. % 3-ring MDI and multi-ring MDI, and/or the fraction containing at least 95 wt. % 2-ring MDI are determined analytically; and an acidic compound is added to the fraction containing at least 5 wt. % 3-ring MDI and multi-ring MDI, and/or the fraction containing at least 95 wt. % 2-ring MDI, so that the desired acidity is achieved.

    摘要翻译： 本发明涉及二苯基甲烷系列的二异氰酸酯和多异氰酸酯的制造方法及其混合物，其中苯胺和甲醛在酸催化剂的存在下反应形成二苯基甲烷系列的二胺和多胺; 任选在溶剂存在下，将二苯基甲烷系列的二胺和多胺光气化，得到粗二异氰酸酯和多异氰酸酯; 从粗二异氰酸酯和多异氰酸酯，至少含有至少5wt。 ％3环和多环MDI和至少一个含有至少95wt。 通过蒸馏分离％2环MDI，并且所述馏分的酸度至少为5重量％ ％3环MDI和多环MDI，和/或含有至少95重量％ ％2环MDI是分析确定的; 并将酸性化合物加入到含有至少5wt。 ％3环MDI和多环MDI，和/或含有至少95重量％ ％2环MDI，从而达到所需的酸度。

    Process for the preparation of di- and polyamines of the diphenylmethane series
    4.
    发明申请
    Process for the preparation of di- and polyamines of the diphenylmethane series 失效
    制备二苯基甲烷系列的二胺和多胺的方法

    公开(公告)号：US20060094897A1

    公开(公告)日：2006-05-04

    申请号：US11257713

    申请日：2005-10-25

    申请人： Heinz-Herbert Muller ,  Stefan Wershofen ,  Stefan Grabowski

    发明人： Heinz-Herbert Muller ,  Stefan Wershofen ,  Stefan Grabowski

    IPC分类号： C07C263/04

    CPC分类号： C07C263/10 ,  C07C209/78 ,  C07C211/50 ,  C07C265/14

    摘要： The present invention relates to a process for the preparation of di- and polyamines of the diphenylmethane series, and to the preparation of di- and polyisocyanates of the diphenylmethane series from these di- and poly-amines. The di- and poly-amines of the diphenylmethane series are prepared by the reaction of aniline and formaldehyde in the presence of hydrochloric acid. In with the present invention, the hydrochloric acid employed contains less than 0.001 wt. % of metal ions which are divalent and/or more than divalent.

    摘要翻译： 本发明涉及一种制备二苯基甲烷系列的二胺和多胺的方法，以及由这些二胺和多胺制备二苯基甲烷系列的二异氰酸酯和多异氰酸酯。 二苯基甲烷系列的二胺和多胺通过苯胺和甲醛在盐酸存在下的反应来制备。 在本发明中，所用​​的盐酸含量小于0.001wt。 ％的二价和/或多于二价的金属离子。