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US 5,212,289 AGranted
Reactive azo dyestuffs obtained by coupling diazotized acylamino-aminobenzene sulfonic acid compounds with pyridone derivatives
AssigneeBayer Aktiengesellschaft
InventorsKarl-Josef Herd, Karl-Heinz Schundehutte, deceased, Eva Schundehutte, heir, Horst Jager
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Abstract
Dyestuffs in the form of their free acid have the following formula (1) ##STR1## in which the substituents have the meaning given in the description. The dyestuffs according to the invention are suitable for dyeing hydroxyl-containing fiber materials in yellow shades.
Claims1
A dyestuff of the following formula
- in which
- R.sub.7 is H, CH.sub.3 or C.sub.2 H.sub.5.
Dependencies are inferred from the claim text.