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    METHOD FOR INHIBITING THE DISCOLORATION OF METHYLENE- BISANILINE COMPOUNDS
    9.
    发明公开
    METHOD FOR INHIBITING THE DISCOLORATION OF METHYLENE- BISANILINE COMPOUNDS 有权
    VERFAHREN ZUR INHIBIERUNG DERVERFÄRBUNG冯甲基联苯

    公开(公告)号：EP1698612A1

    公开(公告)日：2006-09-06

    申请号：EP04807385.2

    申请日：2004-12-20

    申请人： IHARA CHEMICAL INDUSTRY CO., LTD.

    发明人： NAGASAWA, Mato, IHARA CHEMICAL INDUSTRY CO., LTD. ,  ATSUMI, Naoya, IHARA CHEMICAL INDUSTRY CO., LTD. ,  ICHIKAWA, Hirofumi, KUMIAI CHEMICAL IND. CO., Ltd.

    IPC分类号： C07C209/90 ,  C07C211/43

    CPC分类号： C07C209/90 ,  C07C211/50

    摘要： The present invention provides a method by which the discoloration of methylenebisaniline compounds can be inhibited even when they are stored at high temperatures for many hours. That is, the present invention provides a method for inhibiting the discoloration of methylenebisaniline compounds, characterized by adding a phosphine represented by the following general formula:

    (wherein R 3 is an optionally substituted aryl group or an optionally substituted alkyl group; p is 0, 1 or 2 and q is 1, 2 or 3, with the provisos that the sum of p and q is 3 and that when q is 2 or 3, R 3 s may be the same or different from each other) to a compound represented by the following general formula:

    (wherein R 1 and R 2 are each independently a halogen atom or a C1-C6 alkyl group; a and b are each independently an integer of 0 to 4; m and n are each independently an integer of 1 to 5, with the provisos that the sum of a and m and the sum of b and n are each 5 or less and that when a is 2 or more, R 1 s may be the same or different from each other and, when b is 2 or more, R 2 s may be the same or different from each other).

    摘要翻译： 本发明提供了一种方法，即使将其在高温下储存数小时也能够抑制亚甲基双苯胺化合物的变色。 也就是说，本发明提供一种抑制亚甲基双苯胺化合物变色的方法，其特征在于加入由以下通式表示的膦：（其中R 3为任选取代的芳基或任选取代的烷基; p为0， 1或2，q为1,2或3，条件是p和q的和为3，当q为2或3时，R 3可以彼此相同或不同）表示的化合物 由以下通式表示：（其中R 1和R 2各自独立地为卤素原子或C 1 -C 6烷基; a和b各自独立地为0至4的整数; m和n各自独立地为1的整数） 至5，条件是a和m之和与b和n之和各自为5以下，当a为2以上时，R 1可以相同也可以不同，b 为2以上，R 2可以相同也可以不同。