Reactive trisazo dyes

C - Chemistry – Metallurgy – 09 – B

Patent

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Details

C09B 62/09 (2006.01) C09B 62/44 (2006.01) C09B 62/513 (2006.01)

Patent

CA 2415477

The present invention refers to trisazo dyes of the formula (I) or an alkali metal salt thereof; wherein Ar1 is an optionally substituted arylene group; Ar2 is an optionally substituted aryl group; R1, R2, R3, R4, X1 and X2 are defined as given in claim 1; each of D1 and D2, independently, is a chromorphore group of the formula (IV) wherein the variables are defined as given in claim 1, a proces for their preparation and a process for colouring fibre material containing a group reactive with a reactive dye.

La présente invention concerne des colorants au trisazo de formule (I) ou un sel de métal alcalin de ce dernier. Dans la formule, Ar¿1? représente un groupe arylène facultativement substitué; Ar¿2? représente un groupe aryle facultativement substitué; R?1¿, R?2¿, R?3¿, R?4¿, X?1¿ et X?2¿ sont définis comme le stipule la revendication n·1; D?1¿ et D?2¿ représentent individuellement et indépendamment un groupe chromophore de formule (IV) dans laquelle les variables sont telles que définies dans la revendication n·1. Cette invention concerne également un procédé de préparation de ces colorants et un procédé permettant de colorer une matière fibreuse contenant un groupe réagissant à un colorant réactif. Formules (I) et (IV)

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