WATER-SOLUBLE REACTIVE XANTHENIUM DYESTUFFS AND PROCESS FOR THEIR MANUFACTURE

摘要

1311023 Reactive xanthene dyes FARBWERKE HOECHST AG 5 Nov 1970 [6 Nov 1969] 52690/70 Heading C4P The invention comprises reactive xanthene dyes of the general formula wherein R and RSP1/SP are H, halogen, OH, alkyl, alkoxy, carbonyl or sulphonic acid, R 1 and R 2 are H or alkyl, optionally substituted by halogen, OH, carbonyl, sulphonic acid, phenyl, -OSO 3 H or -NH-acyl, or R 1 and R 2 together with the N atom may form an alkylene imine ring which may contain a further hetero atom, R 3 is H or alkyl, A is a mononuclear or binuclear aromatic radical, W is a divalent bridge member, Y is a group -N(R 4 ) q -SO 2 -CH=CH 2 or -N(R 4 ) q -SO 2 -CH 2 CH 2 -Z, wherein Z is OH or an organic or inorganic radical which can be split off by an alkaline agent to form a vinyl group, R 4 is H or alkyl, m and n are 0, 1 or 2, q is 0 or 1 and p is 1 or 2. Y is preferably phenylene. They are prepared by condensing a 3,6- dihalogeno xanthene compound with at least one mole of an amino compound of the general formula wherein R 3 , W, A, R 4 , m, n, p and q are as above or with an amine NH(R 1 )R 2 in aqueous, aqueous-organic or organic medium at 0-120‹ C. and then reacting the mono-condensation product obtained with at least one mole of an amine NH(R 1 )R 2 or the amine first mentioned in aqueous, aqueous-organic or organic medium at 70-200‹ C. in presence of an acid binding agent. When the product dye contains a terminal #-hydroxy ethyl group this may be esterified to -O-SO 3 H, -O-PO 3 H 2 , -O-acyl or halogen, then optionally reacted with an alkaline agent to produce the terminal vinyl group which may then be reacted with thiosulphuric acid, a dialkylamino or phenol to form dyes where Z is -S-SO 3 H, -N(alkyl) 2 or -O-C 6 H 5 . The dyes give violet and blue-red shades on natural or regenerated cellulose fibres, wool, silk, polyamides, polyurethanes and leather.