发明授权
US4474695A Complex dye mixture containing at least two cobalt 1:2 complexes of azo dyes 失效
含有至少两种偶氮染料1:2钴络合物的复合染料混合物

Complex dye mixture containing at least two cobalt 1:2 complexes of azo
dyes
摘要:
Mixtures of two or more cobalt 1:2 complexes of azo dyes of the formula I ##STR1## where R is ##STR2## where R.sup.1 is hydrogen, C.sub.1 -C.sub.18 -alkyl, or hydroxyalkyl or alkoxyalkyl which may be interrupted by oxygen, and X and Y are hydrogen, fluorine, chlorine, bromine, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy.The mixtures according to the invention are particularly useful for dyeing leather.
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