US3852261A Expired / Lapsed US ⏱️ 0.0 years remaining

O-6-hydroxypyridone-2 dyes bearing a cationic group in the 3-position

Assignee: Sandoz AG

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Filing: 1970-11-06

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Granted: 1974-12-03

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Expires: 1990-11-06

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Abstract

Abstract Azo dyes of the formula WHEREIN D is carbocyclic or heterocyclic aryl, R is hydrogen or an organic radical, R1 is hydrogen, hydrocarbyl, heterocyclyl, amino or substituted amino, K is substituted ammonium or hydrazinium (including compounds wherein the nitrogen(s) is (are) part of a heterocyclic ring), and A is an anion. These azo dyes are useful for the dyeing and printing of fibers (and textiles thereof) of acrylonitrile polymers and copolymers as well as polyamides and polyesters containing acidic groups. They give level dyeings having good fastness to light and water.

Inventors

👤 W Steinemann

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-31 23:32

CPC Classifications

C; C09; C09B; C09B44/00; C09B44/10; C09B44/103; C09B44/105; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3626; C09B44/02; C09B44/08

Claims Analysis

Total Claims: 36

Claim 1

Independent Claim 5 words

A COMPOUND OF THE FORMULA

Claim 2

Dependent Claim 5 words

A COMPOUND OF THE FORMULA

Claim 3

Dependent Claim 135 words

A compound according to claim 1 wherein D is phenyl or naphthyl, or a substituted derivative thereof having 1 to 3 substituents, wherein each substituent is independently lower alkyl, lower alkoxy, chloro, bromo, nitro, cyano, phenyl, 4-acetamidophenyl, phenoxy, 4-chlorophenoxy, benzyloxy, anilino, nitroanilino, 2,4-dinitroanilino acetyl, benzoyl, 4-methylbenzoyl, carbamoyl, dimethylcarbamoyl, phenylcarbamoyl, 3-(N,N-dimethylamino)propylcarbamoyl, lower alkoxycarbonyl, acetamido, N,N-dimethylaminoacetamido, lower alkoxycarbonylamino, benzamido, lower alkylsulfonyl, phenylsulfonyl, 4-chlorophenylsulfonyl, benzylsulfonyl, phenoxysulfonyl, lower alkylsulfamoyl, dilower alkylsulfamoyl, phenylsulfamoyl, 3-chlorophenylsulfamoyl, N-phenyl-N-lower alkylsulfamoyl, naphthylsulfamoyl, phenylazo, nitrophenylazo, 4-chlorophenylazo, tolylazo, lower alkoxyphenylazo, 4-phenylazophenylazo, 2-oxopyrrolidinyl-1, 2-oxo-1,3-oxazolidinyl-1 or phthalimido, K is pyridinium, quinolinium or isoquinolinium, or a substituted derivative thereof, wherein each substituted derivative has 1 to 3 substituents and each substituent of each substituted derivative is independently lower alkyl, methoxy, 2-hydroxyethyl, chloro, bromo, cyano, benzyl or N,N-dimethylcarbamoyl, R is hydrogen, lower alkyl, phenyl, benzyl, lower alkoxymethyl, phenoxymethyl, lower alkoxycarbonyl or

Claim 4

Dependent Claim 43 words

A compound according to claim 2 wherein K is pyridinium or substituted pyridinium having 1 or 2 substituents wherein each substituent is independently methyl or ethyl, R is hydrogen, lower alkyl or phenyl, and R1 is hydrogen, lower alkyl, lower hydroxyalkyl or 3-methoxypropyl.

Claim 5

Dependent Claim 56 words

A compound according to claim 3 wherein D is phenyl or substituted phenyl having 1 to 3 substituents, wherein each substituent is independently methyl, methoxy, chloro, nitro, phenoxy, 4-chlorophenoxy, phenyl or phenylazo, K is pyridinium, methylpyridinium or dimethylpyridinium, R is methyl or phenyl, R1 is hydrogen, methyl, 1-hydroxypropyl-2, 2-hydroxyethyl or 3-methoxypropyl, and A is Cl .

Claim 6

Dependent Claim 10 words

A compound according to claim 1 wherein K is pyridinium.

Claim 7

Dependent Claim 9 words