METHOD OF PRODUCING TETRACISAZO DYES Russian patent published in 1994 - IPC

Abstract RU 2016024 C1

FIELD: production of dyes. SUBSTANCE: mixture of 2,6- and 2,4-diaminetoluenes at ratio 1:1.85-4.00 is used as final azo-component. Desired product is prepared by coupling diazotized compound having formula where A are the same or different residues of 2-amino-8-oxynaphthalene-6-sulfoacid and/or 1,6(1,7)-aminonaphthalenesulfoacid with mentioned above azo-component. EFFECT: improves desired product quality.

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RU 2 016 024 C1

Authors

Glushchenko S.N.

Shirokij E.I.

Shkil' O.A.

Slezko G.F.

Savchishin S.V.

Dates

1994-07-15—Published

1992-07-09—Filed