The invention relates to water-insoluble styryl dyestuffs of the formula ##STR1## in which X is an O- or S-atom, B is an alkylene group, R is a hydrogen atom, an alkyl or aryl or the remaining members of ring system which is fused to the ring c, Z is a cyano group or a carboxylic acid ester. The dyestuffs are outstanding suitable for the dyeing of synthetic fibre materials which are dyed in greenish-yellow shades with good fastness properties, especially good resistance to hydrolysis.
本发明涉及一种
水不溶性的
苯乙烯基
染料,其
化学式为##STR1##其中X为O-或S-原子,B为烷基,R为氢原子、烷基或芳基或嵌合在环c上的其余成员,Z为
氰基或
羧酸酯。该
染料非常适合于染色合成纤维材料,其染成绿黄色调具有良好的牢度性能,特别是良好的
水解抗性。