Compositions of nitro-anilines for producing azo dyes on fibers

Details Compositions of nitro-anilines for producing azo dyes on fibers Compositions of nitro-anilines for producing azo dyes on fibers

1982-01-29

1983-01-11

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dye concentrate composition wherein an additional amount of...

8564, 8580, 8649, 8662, 8667, D06P 112, D06P 6700

Patent

active

043680542

ABSTRACT:
Liquid compositions of nitro group-containing aniline compounds containing no sulfonic acid and/or carboxylic acid groups and having a melting point of below 140.degree. C., especially those suitable for use as diazo component in ice color dyeing, which contain 20 to 70% of this nitro-aniline, 5 to 80 weight % of a castor oil oxethylated with 25 to 60 mols of ethylene oxide, and 5 to 65 weight % of N-methyl-pyrrolidone as solvent. By simply mixing these components clear solutions are obtained which can be diazotized within a few seconds by means of an aqueous sodium nitrite solution and thus give diazonium salt solutions free from residue. These diazonium salt solutions can be used in simple manner and very advantageously as developing baths or liquors for producing water-insoluble azo dyestuffs on the fiber according to the ice color technique.

REFERENCES:
patent: 3332938 (1967-07-01), Mayhew et al.
patent: 4179267 (1979-12-01), Lacroix et al.
patent: 4331442 (1982-05-01), Uhlig et al.

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