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US 4,118,383 AGranted
Azo dyes containing an N-2-pyridine-2,4-dihydroxybenzamide coupler component
AssigneeAmerican Color & Chemical Corporation
InventorRaouf Botros
Life of this patent
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Abstract
Azo compounds of the formula ##STR1## are provided where A is a diazotiable aromatic hydrocarbon. In particular, A is an optionally substituted benzene or naphthalene nucleus and E is an optionally substituted pyridine nucleus. The compounds provide dyeings on synthetic fibers with excellent dyeing and fastness properties.
Claims11
An azo compound of the formula:
- ##STR19## wherein A is phenyl, phenyl substituted by up to three substituents, naphthyl or naphthyl substituted by up to two substituents, the substituents being independently selected from the group consisting of alkyl of 1-4 carbon atoms;
- alkoxy of 1-4 carbon atoms;
- nitro;
- cyano;
- fluoro;
- chloro;
- bromo;
- trifluoromethyl;
- hydroxy;
- RCOO--, where R is alkyl of 1- 4 carbon atoms;
- carboxy;
- ROOC--, where R is alkyl of 1- 4 carbon atoms;
- RCO--, where R is alkyl of 1- 4 carbon atoms;
- benzoyl;
- RCONH--, where R is alkyl of 1- 4 carbon atoms;
- ArCONH--, where Ar is phenyl;
- and carbamyl, the nitrogen of which is unsubstituted or singly or doubly substituted with alkyl of 1- 4 carbon atoms;
- and
- R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen;
- alkyl of 1- 4 carbon atoms;
- alkoxy of 1- 4 carbon atoms;
- nitro;
- chloro and bromo.
20 more elements
Dependencies are inferred from the claim text.