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Exhaust dyeing of textured polyester knits - yellow shades with known azopyridone dyes from halohydrocarbon baths
Exhaust dyeing of textured polyester knits - yellow shades with known azopyridone dyes from halohydrocarbon baths
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机译:涤纶针织物的尾气染色-卤代烃浴中已知的偶氮吡啶酮染料呈黄色
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摘要
The known dyes have the formula (I) (in one of their tautomeric forms): (where R1 and R2 are each H, lower alkyl or alkenyl, cycloalkyl or aryl opt. substd.; or R1 and R2 together with the N atom and with inclusion of another heteroatom, may form a 5-6-membered heterocycle; X is halogen e.g. F and esp. Cl, CN or pref. NO2; Y is lower alkyl opt. substd. by OH or CN; Z is -CO or -SO2). They are prepd. in known manner by coupling diazotised amines with Y substd. pyridone.
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