Symmetrical trisazo dye obtained by coupling tetrazotized
4-4'-diaminozobenzene with 2-carboxymethylamin0-8-naphthol-6-sulphonic
acid
    2.
    发明授权
    Symmetrical trisazo dye obtained by coupling tetrazotized 4-4'-diaminozobenzene with 2-carboxymethylamin0-8-naphthol-6-sulphonic acid 失效
    通过将四唑化的4-4'-二氨基苯与2-羧甲基甲基氨基-8-萘酚-6-磺酸偶联得到的对称三偶氮染料

    公开(公告)号:US4248776A

    公开(公告)日:1981-02-03

    申请号:US33225

    申请日:1979-04-25

    CPC分类号: C09B35/35

    摘要: The present invention concerns a new acid trisazo dye suited for the dyeing of natural and synthetic polyamidic fibres and particularly for the dyeing of leather. The dye has the following structural formula: ##STR1## and dyes in a full black shade. The present invention also includes a process for the preparation of dye (I) and comprises tetrazotizing 4-4' diaminoazobenzene and then coupling the tetrazo-compound thus formed with 2 molecules of 2-carboxymethylamino-8-naphtol-6-sulphonic acid (carboxy methyl-gamma acid) in an alkaline medium.

    摘要翻译: 本发明涉及适用于天然和合成聚酰胺纤维染色的新型酸性三偶氮染料,特别是用于染色皮革。 该染料具有以下结构式:(I)和全黑色染料。 本发明还包括制备染料(I)的方法,并且包括将4-4'-二氨基偶氮苯四唑化,然后将由此形成的双偶氮化合物与2分子的2-羧甲基氨基-8-萘酚-6-磺酸(羧基 甲基-γ酸)在碱性介质中。