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Bisazo dyes based on hydroxynaphthalenecarboxylic acids
Bisazo dyes based on hydroxynaphthalenecarboxylic acids
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机译:基于羟基萘羧酸的双偶氮染料
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摘要
Disclosed are bisazo compounds of the formula Ia or Ib where RSUP1 /SUPis hydrogen or methyl, the X groups are independently -CHSUB2/SUBCHSUB2/SUB- or -CHSUB2/SUBCHSUB2/SUBCHSUB2/SUB-, RSUP2/SUP, RSUP3/SUP, and RSUP4 /SUPare independently hydrogen or methyl, A is an anion and n corresponds to the valency of A. Also disclosed are the use of the bisazo compounds for dyeing, especially paper, and colorants containing said bisazo compounds.
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