| abstract |
Disperse dyes of the formula wherein D the remainder of a diazo component of the benzene, naphthalene, diphenyl, azobenzene, thiophene, benzthiazole, benzisothiazole, thiazole, thiadiazole, indazole, benzotriazole, pyrazole, anthraquinone, naphtholeimide, chromon or is diphenylene oxide series; X represents hydrogen, methyl, halogen or - NH - CO - R, where R is methyl, ethyl, propyl, isopropyl, ethoxy or amino; Y is hydrogen, halogen, methoxy or - O - (CH₂) n - OR ', where R' is hydrogen, CH₃ or CH₂CH₂CN, and n is an integer from 1 to 6; R₃ is C₁- C₆ alkyl and R₄ is hydrogen, C₁- C₆ alkyl or allyl.n n n The dyes are particularly suitable for dyeing textile material made of polyester fibers and are particularly distinguished by very good lightfastness. |