By K. Venkataraman

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CH, E. SIEGEL 24 The halogen-free group ( D y e ) — N H - OC—CH=CH— COOH was first mentioned by Cassella in cellulose-reactive dyes 13 and by Sandoz in 1:2 metal complex dyestuffs for wool. 75 Later, Mitsubishi Chem. Ind. patented halotriazine dyestuffs, which also contained monoamides of alkenedicarboxylic acids as further reactive groups. 76 c. Cyclic Halomaleinimides. Sumitomo describes the production of reactive dyestuffs by acylation of dyes containing amino groups with carboxylic or sulfonic halides of iV-aryl halomaleinimides (or halosuccinimides), such as 7 6 a c l o c 7.

1964). , Vol. I X , p. 258, Thieme, Stuttgart, 1955. 1963). 134 I. , the yellow 136 HOCH 2 CH 2 S0 2 CH 3 CH3^f V N = N H O C H 2 C H 2 S 0 2 CH 3 ^CH3 X H O ^ ^ N / N S03H Reaction with the fiber in the presence of alkali takes place, however, only on heating to higher temperatures. , HOCH2CH2—02S—/ \-N=N^ /CH-, CH 3 Yellow S03H Fixation is obtained, for example, by treatment for 1 minute in dry heat at 200° in the presence of soda ash. 1959). 1960). 1963). 137 E. SIEGEL 50 12. Vinyl Su If ones a.

Reactive dyes of these two groups were described in 1957 by Cassella, 13 Ciba, 48 Hoechst, 49 and BASF. 5 0 Up to the present, acrylamide reactive dyestuffs have found no technical application for the dyeing of cellulosic fibers. On the other hand, they have achieved practical importance for wool in the Procilan dyestuffs of ICI. 1957). 1957). 1958). 1957). 1963). 1961). 1961); 18 E. 1965). 55 J. Soc. Dyers color. 80, 158, 283 438, and 649 (1964). 19 I. , (I). 56 u (Dye)—S0 2 NH 2 + C H 2 = C H — C O — N ^ ^ N — C O — C H = C H 2 + HO—Cellulose -25t» N" I CO—CH=CH2 (I) m y e V - S O 2 NHCH 2 CH 2 —OC—N " ^ N - CO—CH 2 CH 2 —0—Cellulose I CO—CH=CH2 Triacryloformal (I), which acts as a fixation component, is easily obtained from acrylonitrile and paraformaldehyde.

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