Water-soluble disazo dyestuffs and process for coloring syntheti

Details Water-soluble disazo dyestuffs and process for coloring syntheti Water-soluble disazo dyestuffs and process for coloring syntheti

1978-08-23

1980-03-25

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

260186, 260187, C09B 2700, D06P 102

Patent

active

041948831

ABSTRACT:
Water-soluble disazodyestuffs of the formula ##STR1## in which R.sub.1 and R.sub.2 are identical or different and each is hydrogen, methyl, ethyl or methoxy, and R.sub.3 is hydrogen, chlorine, nitro or alkyl of 1 to 4 carbon atoms, and their salts have been found which possess very good dyeing characteristics and are very well suitable for dyeing of synthetic polyamides and yield dyeings on these fibers with good to very good wet fastnesses and fastnesses to processing and to use. In accordance with this, an improved process had been found for coloring synthetic polyamide fibres by applying the above dyestuffs of the invention on said fibres in usual dyeing and printing methods and fixing them on the fibre by methods as usual in the art.

REFERENCES:
patent: 2778817 (1957-01-01), Grandjean
patent: 2813855 (1957-11-01), Bossard et al.
patent: 3676050 (1972-07-01), James
patent: 3904596 (1975-09-01), Blackwell et al.
patent: 3932376 (1976-01-01), Feeman
patent: 3960831 (1976-06-01), Nickel et al.
Venkataraman, K., "The Chemistry of Synthetic Dyes," (Academic Press), vol. 1, 1952, p. 270.

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