发明授权
US4247460A Disazo dyestuff sulphuric acid ester 失效
双偶氮染料硫酸酯

Disazo dyestuff sulphuric acid ester
摘要:
A dyestuff particularly for synthetic fibers of the formula ##STR1## wherein R.sub.1 ' denotes hydrogen, methyl, ethyl or cyclohexyl,R.sub.2 ' denotes chlorine, methoxy, methyl, ethoxy, ethyl, trifluoromethyl or acetylamino,R.sub.3 ' denotes hydrogen, methyl, methoxy, ethyl and ethoxy,R.sub.4 ' denotes hydrogen, methyl, methoxy, ethyl and ethoxy,R.sub.5 ' denotes hydrogen, methyl, methoxy, chlorine or phenyl,R.sub.6 ' denotes hydrogen or methyl,R.sub.7 ' denotes hydrogen, methyl, ethyl, 2-hydroxyethyl, 2-hydroxypropyl and 2-hydroxybutyl,m' denotes 0 or 1 andX denotes optionally branched C.sub.2 to C.sub.4 alkylene.
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