US 4,052,378 A · Red pigment obtained by coupling diazotized 4-aminonaphthalimide with 2,6-dihydroxy-3-cyano-4-methylpyridine

Abstract

The azo dye of the formula ##STR1## is a brilliantly red pigment which imparts lightfast and migration resistant color to printing inks, plastics, and the like.

Claims1

Dependent claims

The compound of the formula ##STR3##

Dependencies are inferred from the claim text.

Facts

Application

05/651,072Filed 21 Jan 1976

Priority

DT 250373230 Jan 1975

Granted

4 Oct 1977

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

C09B 29/3634
From a pyridine ring containing one or more hydroxyl groups: from diazotized heterocyclic rings
C09B 29/0048
The heterocyclic ring containing only nitrogen as heteroatom: containing a six-membered heterocyclic ring with one nitrogen atom
C09B 43/00
Preparation of azo dyes from other azo compounds
C09B 43/34
By reacting carboxylic or sulfonic groups, or derivatives thereof, with amines; by reacting keto-groups with amines: by reacting ortho- or…

Abstract

The azo dye of the formula ##STR1## is a brilliantly red pigment which imparts lightfast and migration resistant color to printing inks, plastics, and the like.

Red pigment obtained by coupling diazotized 4-aminonaphthalimide with 2,6-dihydroxy-3-cyano-4-methylpyridine

Life of this patent

Abstract

Claims1

Red pigment obtained by coupling diazotized 4-aminonaphthalimide with 2,6-dihydroxy-3-cyano-4-methylpyridine

Life of this patent

Abstract

Claims1