Water-soluble disazo dyestuffs

Details Water-soluble disazo dyestuffs Water-soluble disazo dyestuffs

1978-10-31

1982-04-06

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260153, C09B 4500, C09B 2922

Patent

active

043234976

ABSTRACT:
The novel water-soluble disazo dyestuffs consist of two monoazo dyestuff moieties each containing as diazo component an amine of the benzene or naphthalene series and as coupling component an amino-naphthol-mono- or disulfonic acid. The two moieties are bonded to each other via a bridge member bound to the amino groups of the coupling components and comprising two triazine radicals each containing a halogen atom, a sulfonic acid group or a thio ether or oxygen ether group or an amino group and the diazo components contain a fiber-reactive radical of the vinyl sulfone series. The metal-free dyestuffs can be transformed into the corresponding heavy metal complex dyestuffs, preferably copper, cobalt and chromium complex dyestuffs, by treatment with an agent donating a heavy metal cation. The novel dyestuffs are excellently suitable for dyeing and printing fiber material of natural and regenerated cellulose and natural, regenerated and synthetic polyamides. They are distinguished by a high tinctorial strength, a very good uptake from a long liquor, a good color- build up and good printing properties. The dyeings obtained therewith have a high fastness to processing and in use.

REFERENCES:
patent: 3304297 (1967-02-01), Wegmann
patent: 3591577 (1971-07-01), Moiso et al.
patent: 3646002 (1972-02-01), Andrew et al.
patent: 4038267 (1977-07-01), Sueda et al.
patent: 4054559 (1977-10-01), Aoki et al.

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