Process for the preparation of aminoazo dyes

Details Process for the preparation of aminoazo dyes Process for the preparation of aminoazo dyes

1994-09-22

1996-09-10

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534588, 534574, C09B 62503, C09B 62505, C09B 6251, C09B 62513

Patent

active

055547311

ABSTRACT:
Preparation of water-soluble reactive dyes containing vinylsulphonyl and .beta.-sulphatoethylsulphonyl groups by the oxidation of dyes containing .beta.-hydroxyethylmercapto radicals, and then sulphation and, if appropriate, conversion of the .beta.-sulphatoethylsulphonyl radical to the vinylsulphonyl radical with bases.

REFERENCES:
patent: 4992589 (1991-02-01), Fuchs et al.
patent: 5107025 (1992-04-01), Herd
patent: 5432266 (1995-07-01), Herd et al.

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