Mixtures of blue disperse azo dyestuffs for dyeing synthetic fib

Details Mixtures of blue disperse azo dyestuffs for dyeing synthetic fib Mixtures of blue disperse azo dyestuffs for dyeing synthetic fib

1985-12-20

1987-08-25

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Mixed dyes, noncomplexed

8638, 8921, 8922, 8924, C09B 2908, C09B 6722, D06P 118, D06P 354

Patent

active

046890505

ABSTRACT:
Disperse Blue 56 is an important blue dyestuff for dyeing PES fibers at the boil or under high-temperature conditions. This anthraquinonoid compound Disperse Blue 56, in addition to its advantages (high light fastness, pH/reduction insensitivity, purity of hue), has some technical disadvantages (poor leveling properties, pronounced staining of adjacent fiber, metameric red shift).
By combining a plurality of blue disperse azo dyestuffs having selected structural features in the form of mixtures or mix-crystals it is possible to match the advantages of Disperse Blue 56 while substantially avoiding its disadvantages at the same time. These azo dyestuffs are based on coupling products of diazotized 2,6-substituted 4-nitroanilines with substituted N,N-dialkylanilines.

REFERENCES:
patent: 4105655 (1978-08-01), Gottschlich et al.
patent: 4212642 (1980-07-01), Della Casa et al.
patent: 4237048 (1980-12-01), Gottschlich et al.
patent: 4386934 (1983-06-01), Bergmann et al.
patent: 4401692 (1983-08-01), Schickfluss et al.
patent: 4422854 (1983-12-01), Hahnle et al.

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