Cationic polyazo dyestuffs, their stable solutions, their prepar

Details Cationic polyazo dyestuffs, their stable solutions, their prepar Cationic polyazo dyestuffs, their stable solutions, their prepar

1984-01-16

1985-03-05

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Leather dyeing

8539, 8639, 8644, 8919, 8687, 534677, 534829, C09B 4404, D06P 108, D06P 332

Patent

active

045028621

ABSTRACT:
Cationic polyazo dyestuffs which can be obtained by reacting diaminobenzene derivatives of the general formula ##STR1## wherein R represents hydrogen, C.sub.1 - to C.sub.4 -alkyl, C.sub.1 - to C.sub.4 -alkoxy or halogen,
if appropriate in a mixture with up to 30% of aromatic monoamines of the formula ##STR2## wherein R.sup.2 represents hydrogen, C.sub.1 - to C.sub.4 -alkyl, C.sub.1 - to C.sub.4 -alkoxy, halogen or C.sub.1 - to C.sub.4 -acylamino and n represents 1 to 3,
with 0.5 to 0.75 mole of a salt or ester of nitrous acid per mole of diamine and then with 1 to 4 moles of an alkylene oxide of the formula ##STR3## wherein R.sup.3 represents hydrogen or an optionally hydroxyl-, alkoxy- or halogen-substituted C.sub.1 - to C.sub.4 -alkyl radical,
are used--preferably in the form of their solutions--for dyeing paper, leather and anionically modified synthetic fibres.

REFERENCES:
patent: 2022606 (1935-11-01), Smith
patent: 3346322 (1967-10-01), Finkenauer et al.
patent: 4400321 (1983-08-01), Linhart et al.

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