Soluble protonated amino-azobenzene dyes - for dyeing or printing polyacrylonitrile, modified polyester or polyamide etc.

摘要

Water-soluble azo dyes contg. no SO3H or COOH gps. of formula (I) are new: (D = carbocyclic or heterocyclic radical contg. =1 electron-withdrawing gp. X is opt. substd. alkoxy or alkylcarbonyl and ring E is opt. substd. by l lower alkyl or halo. R1 and R2 = H, opt. substd. lower alkyl, cycloalkyl, aralkyl or aryl, or NR1R2 is a 5-6 membered heterocycle opt. contg. a heteroatom. A is an anion). Pref. circled D1 - = Z ; Z is electron-withdrawing gp., esp NO2; X is CH3O; R1R2=H, loweralkyl or together a ring A is sulphamate anion and E is unsubstd. at 3,5 and 6 positions. They are used esp. for dyeing and printing (co)polymers of acrylonitrile or of dicyanoethylene, and acid-modified polyester or polyamide. They give bright, strong, yellow to violate shades of good fastness to washing, perspiration, steam-pleating and light, and generally non-photopropic esp. when Z=NO2. They can also be used in wet transfer printing.