Dispersant composition for azo dyestuffs contaminated with solub

Details Dispersant composition for azo dyestuffs contaminated with solub Dispersant composition for azo dyestuffs contaminated with solub

1986-06-17

1988-05-10

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Polymeric additive

8590, 8597, 8600, 8624, 530505, C09B 6700

Patent

active

047432683

ABSTRACT:
An improved composition for use as a dispersant in azo dye systems contaminated with soluble copper impurities comprising an amine lignosulfonate salt and ethylenediaminetetraacetic acid. Preferably, the ethylenediaminetetraacetic acid is employed in an amount of about 1 to about 4 moles per each molar amount of the copper present in the system, per 1,000 grams of the lignosulfonate. Also disclosed is an improved azo dye system containing an amine lignosulfonate salt and ethylenediaminetetraacetic acid, and an improved method of dyeing materials with copper-contaminated dye systems containing azo dyestuffs and lignosulfonate salts wherein the azo dye reduction effect is alleviated by utilizing as the lignosulfonate salt an amine salt thereof, together with ethylenediaminetetraacetic acid.

REFERENCES:
patent: 2594302 (1952-04-01), Ehrensperger
patent: 3412018 (1968-11-01), Monzie
patent: 3455895 (1969-07-01), Niild-Rama et al.
patent: 4666528 (1987-05-01), Arrington et al.
patent: 4715864 (1987-12-01), Dilling et al.
E. R. Trotman, "Dyeing and Chemical Technology of Textile Fibres", (Sixth Edition), Wiley, 1984, pp. 144-145.

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