Abstract Disazo dyestuffs of the formula: ##SPC1## Wherein B represents a 1,4-phenylene radical which may be substituted by CH 3 , OCH 3 , NHCOCH 3 or NHCONH 2 or a 1,4-naphthylene radical which may be substituted by OCH 3 or SO 3 H, and Z represents NH 2 or OCH 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.
A disazo dyestuff of the formula: ##SPC5## wherein B is a member of the group consisting of 1,4-phenylene, 1,4-naphthylene, 1,4-phenylene carrying 1 or 2 substituents from the class consisting of CH 3 , OCH 3 , NHCOCH 3 and NHCONH 2 , and 1,4-naphthylene substituted by SO 3 H in the 6- or 7-pisition, and Z is NH 2 or OCH 3 .
Claim 2
Dependent Claim
63 words
A disazo dyestuff of the formula: ##SPC5## wherein B is a member of the group consisting of 1,4-phenylene, 1,4-naphthylene, 1,4-phenylene carrying 1 or 2 substituents from the class consisting of CH 3 , OCH 3 , NHCOCH 3 and NHCONH 2 , and 1,4-naphthylene substituted by SO 3 H in the 6- or 7-pisition, and Z is NH 2 or OCH 3 .
Claim 3
Dependent Claim
21 words
A disazo dyestuff as claimed in claim 1 having the formula: ##SPC6## wherein Z is OCH 3 or NH 2 .
Claim 4
Dependent Claim
18 words
A mixture of the two disazo dyestuffs claimed in claim 2 in which Z represents OCH 3 .
Claim 5
Dependent Claim
18 words
A mixture of the two disazo dyestuffs claimed in claim 2 in which Z represents NH 2 .
Claim 6
Dependent Claim
12 words
A disazo dyestuff as claimed in claim 1 having the formula: ##SPC7##