Stable concentrated solution of a dye of the disazo class

Details Stable concentrated solution of a dye of the disazo class Stable concentrated solution of a dye of the disazo class

1979-03-01

1981-04-07

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

Cellulose substrate other than paper

8527, 8564, 8609, 8673, 8687, 8696, 8919, 8937, D06P 6700, D06P 360

Patent

active

042603919

ABSTRACT:
There is described a stable concentrated solution of a dye of the disazo class, which solution contains 15 to 30 percent by weight of the dye of the formula ##STR1## in the form of the lithium salt, optionally in admixture with up to 75 percent by weight of the sodium, potassium or ammonium salt, dissolved in 5 to 35 percent by weight of water, 2 to 10 percent by weight of pyrrolidone or of N-alkyl-(C.sub.1 -C.sub.4)-pyrrolidone and 35 to 50 percent by weight of a diethylene glycol monoalkyl ether; a process for producing this liquid preparation, and its use for dyeing and printing cellulose and regenerated cellulose, particularly however for dyeing paper.

REFERENCES:
patent: 3621008 (1971-11-01), Ross et al.
patent: 3852029 (1974-12-01), Bolliger et al.
patent: 3963430 (1976-06-01), Nonn et al.
patent: 3986827 (1976-10-01), Dombchik
patent: 4073615 (1978-02-01), Lacroix et al.
patent: 4074966 (1978-02-01), Lacroix et al.
patent: 4098569 (1978-07-01), Lacroix et al.

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