| abstract |
(57) [Summary] [Structure] Formula: [In the formula, R 1 is —NH—CO—R 2 or —CO—N (R 3 ) R 4 ; R 2 is amino, or unsubstituted or substituted C 1 —C 4 alkyl and the like; R 3 and R 4 independently of each other, Hydrogen, C 1 -C 4 alkyl or C 2 -C 4 hydroxyalkyl; and K is of formula (2) or (3) (wherein R 5 and R 6 are hydrogen or C 1 -C 4 alkyl; X is C 1 -C 4 Alkoxy, C 2 -C 4 hydroxyalkoxy or formula - Radicals of N (R 7 ) R 8 ; R 7 and R 8 independently of one another are unsubstituted or substituted C 1 -C 4 alkyl, etc.] azo dyes (mixtures) and their preparation And their use for dyeing and printing fibrous materials containing nitrogen or containing hydroxyl. [Effect] The azo dye of the present invention has good resistance to rubbing, wetting, water-sharpening and light, has excellent adhesiveness and compatibility with other dyes, and enables dyeing without uneven color tone. |