Fiber reactive dioxazine compounds having four vinylsulfone type reactive groups.

摘要

A dioxazine compound represented by the following formula (I) in the free acid form, <CHEM> wherein R is hydrogen, halogeno, alkyl, alkoxy or sulfo, V is a direct linkage or <CHEM> in which R4 is hydrogen or alkyl, X is a direct linkage or an aliphatic, araliphatic or aromatic bridging group, B1 and B2 independently of one another are each phenylene or naphthylene, Y1 and Y2 independently of one another are each -CH=CH2 or -CH2CH2Z in which Z is a group splittable by the action of an alkali, and R1, R2 and R3 independently of one another are each hydrogen or alkyl, which is useful for dyeing or printing fiber materials such as cellulose fiber materials to give dyed or printed products of a deep blue color superior in fastness properties.