发明授权
US5037964A Metal-free sulfo group-free basis disazo and trisazo compounds containing two different 6-hydroxypyrid-2-one coupling component radicals 失效
含有两个不同的6-羟基吡啶-2-酮偶联组分基团的无金属的无磺基双偶氮和三偶氮化合物

Metal-free sulfo group-free basis disazo and trisazo compounds
containing two different 6-hydroxypyrid-2-one coupling component
radicals
摘要:
(i) Metal-free compounds of the formula ##STR1## These compounds are useful as dyes for paper and textiles.
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