C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
8/26, 260/174.2
C09B 29/00 (2006.01) C09B 29/01 (2006.01) C09B 29/08 (2006.01) C09B 62/45 (2006.01) D06P 1/02 (2006.01)
Patent
CA 1097622
ABSTRACT OF THE DISCLOSURE Novel water-soluble dyestuffs had been found which, in the form of the free acid, have the formula (I) Image (1) in which R1 is hydrogen, alkyl having from 1 to 4 carbon atoms, benzyl, benzyl substituted in the benzene nucleus by methyl and/or chlorine, or is hydroxyalkyl having from 2 to 4 carbon atoms or hydroxyalkyl having from 2 to 4 carbon atoms and esterified with an inorganic or organic acid, cyanoalkyl having from 2 to 4 carbon atoms in the alkyl moiety, carboxy, carbonamido or carbalkoxyalkylene each having from 1 to 4 carbon atoms in the alkyl or alkylene moiety, halogenoalkyl having 2 or 3 carbon atoms, or halogenoalkenyl having 2 or 3 carbon atoms, R2 is hydrogen, methyl, ethyl or halogen, R3 is hydrogen, halogen, methyl, ethyl, methoxy, ethoxy or nitro, R4 is hydrogen, halogen, methyl, ethyl, methoxy, ethoxy or nitro and their salts. The novel dyestuffs can be prepared by coupling the corresponding diazo component of the amine of formula Image wherein R3 and R4 is defined above and W is hydroxy or sulfato, with a compoud of formula Image with R1, R2 and W defined aove, and subsequently esterifying the resulting azo compound when containing W as hydroxy, by means of a sulfatization agent. The novel dyestuffs are very well suitable for the dyeing of cellulose fiber materials ac- cording to known methods of applying and fixing fiber-reac- tive dyestuffs, furthermore also well suitable for the dyeing of natural and synthetic polyamide fibers. - 1a -
291703
Hoyer Ernst
Schlafer Ludwig
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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