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

C - Chemistry, Metallurgy

09

B

8/25.2

C09B 67/00 (2006.01) C09B 67/26 (2006.01) C09B 69/02 (2006.01) D21H 21/28 (2006.01)

Patent

CA 1153851

Case 1-12192/1+2/= A STABLE CONCENTRATED SOLUTION OF A DYE OF THE DISAZO CLASS Abstract There is described a stable concentrated solution of a dye of the disazo class, which solution contains 15 to 30 per cent by weight of the dye of the formula Image in the form of the lithium salt, optionally in admixture with up to 75 per cent by weight of the sodium, potassium or ammonium salt, dissolved in 5 to 35 per cent by weight of water, 2 to 10 per cent by weight of pyrrolidone or of N-alkyl-(C1-C4)-pyrrolidone and 35 to 50 per cent 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.

343785

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