Disazo dyestuffs

Details Disazo dyestuffs Disazo dyestuffs

1973-05-11

1976-04-13

Sebastian, Leland A.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 1B, 8 1E, 8 41R, 8 51, 260153, C09B 2700, C09B 4548, D06P 102, D06P 300

Patent

active

039501280

ABSTRACT:
Disazo dyestuffs of the formula: ##SPC1##
Wherein B represents a 1,4-phenylene radical which may be substituted by CH.sub.3, OCH.sub.3, NHCOCH.sub.3 or NHCONH.sub.2 or a 1,4-naphthylene radical which may be substituted by OCH.sub.3 or SO.sub.3 H, and Z represents NH.sub.2 or OCH.sub.3, and their manufacture by conventional condensation methods. These dyes are brown cellulose-reactive dyes, (including bluish-brown, orange-brown and reddish-brown shades) which exhaust well on to the fibre from saline dyebaths with high fixation of the absorbed dye, so that deep shades of high tinctorial strength can be obtained; the resulting shades have excellent fastness to light and to washing tests, in which latter there is a remarkably low level of staining, and above all, excellent fastness to bleach treatments.

REFERENCES:
patent: 3050515 (1962-08-01), Gunst
patent: 3165506 (1965-01-01), Gunst
patent: 3340247 (1967-09-01), Riat et al.

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