Use of benzoquinones for the direct dyeing of keratin fibres
    6.
    发明授权
    Use of benzoquinones for the direct dyeing of keratin fibres 失效
    使用苯醌直接染色角蛋白纤维

    公开(公告)号:US4867751A

    公开(公告)日:1989-09-19

    申请号:US682475

    申请日:1984-12-17

    摘要: The invention relates to the use, for dyeing keratin fibres, and in particular human hair, of benzoquinone derivatives of the formula: ##STR1## in which R.sub.1 and R.sub.3 independently of one another denote hydrogen, a hydroxyl group, an alkoxy group or an optionally hydroxylated alkyl group, and R.sub.2 and R.sub.4 independently of one another denote hydrogen, hydroxyl, alkoxy, alkyl, or phenyl optionally substituted by OH, these compounds having at most two alkyl or alkoxy groups on the quinone ring; if one of the radicals R.sub.1, R.sub.2, R.sub.3 or R.sub.4 denotes a methyl, hydroxyl or methoxy group, at least one of the other substituents is different from hydrogen, and if two of these substituents R.sub.1, R.sub.2, R.sub.3 or R.sub.4 are identical and located in the para-position relative to one another and denote hydroxyl or methoxy, at least one of the other two substituents is different from hydrogen.

    摘要翻译: 本发明涉及用于染色角蛋白纤维,特别是人类头发的下式的苯醌衍生物:其中R 1和R 3彼此独立地表示氢,羟基,烷氧基或任选地 羟基化烷基,R2和R4彼此独立地表示氢,羟基,烷氧基,烷基或任选被OH取代的苯基,这些化合物在醌环上具有至多两个烷基或烷氧基; 如果基团R 1,R 2,R 3或R 4中的一个表示甲基,羟基或甲氧基,其它取代基中的至少一个不同于氢,并且如果这些取代基中的两个取代基R 1,R 2,R 3或R 4相同且位于 在相对于彼此的对位并且表示羟基或甲氧基,其它两个取代基中的至少一个不同于氢。