Disperse azo dyes, a process for the preparation thereof and the use thereof

Patent metadata

Field	Value
Publication number	US-10934435-B2
Application number	US-201616197603-A
Country	US
Kind code	B2
Filing date	Dec 15, 2016
Priority date	May 25, 2016
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

The present invention relates to azo dyes of formula

wherein
R 1 denotes hydrogen or C 1 -C 12 alkyl which is unsubstituted or substituted by one or more C 1 -C 12 alkoxy groups, C 1 -C 12 alkylcarbonyl groups, C 7 -C 25 arylcarbonyl groups, hydroxyl groups, amino groups, cyano groups or halogen atoms and which may be interrupted one or more times by the radical —O—, —S—, —NR 4 —, —COO— or —OOC—, R 4 is hydrogen or C 1 -C 12 alkyl; X is hydrogen or halogen; and R 2 and R 3 are each independently of the other hydrogen; C 1 -C 12 alkyl which is unsubstituted or substituted by cyano, carboxy, hydroxy, C 1 -C 6 alkoxy or C 2 -C 8 alkoxyalkoxy; or are C 7 -C 25 aralkyl which is unsubstituted or substituted by cyano, carboxy, hydroxy, C 1 -C 6 alkoxy or C 2 -C 8 alkoxyalkoxy,

to mixtures containing said dyes and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fibre materials, more especially textile materials.

First claim

What is claimed is:

1. An azo dye of formula

wherein
R 1 denotes C 2 alkyl;
X is hydrogen or bromine; and
R 2 and R 3 are each C 3 alkyl substituted by C 1 alkoxy.

2. A dichromatic or trichromatic dye mixture comprising at least one azo dye of formula (1) according to claim 1 and at least one further disperse dye.

3. A process for dyeing polyester fibre materials, in which process a dye of formula (1) according to claim 1 is applied at a concentration of 1.0% by weight to the said polyester materials.

4. A polyester fibre material dyed by the process according to claim 3 .

Assignees

• Huntsman Int Llc

Inventors

• Hall Veronique
• Dalle Nogare Siro
• Da Silva Saraiva Sandra
• Roentgen Georg
• Tzikas Athanassios

Classifications

• D06P1/18

  Azo dyes · CPC title

• C09B67/0041

  mixtures containing one azo dye · CPC title

• D06P3/54

  using dispersed dyestuffs · CPC title

• C09B29/3639 Primary

  from a pyridine ring containing one or more amino groups · CPC title