Process for preparing reactive azo dyes

Details Process for preparing reactive azo dyes Process for preparing reactive azo dyes

C - Chemistry, Metallurgy

09

B

C09B 43/44 (2006.01) C09B 62/006 (2006.01)

Patent

CA 2212143

Reactive dyestuffs of the formula (I) (I), Image wherein A denotes the radical of a diazo component and X is a fibre-reactive heterocyclic radical are obtained by hydrolysis of maleylated azo dyestuffs of the formula (IV) (IV), Image and subsequent reaction with reactive components of the formula X-Hal without intermediate isolation, the other substituents having the meaning given in the description.

Des colorants azoïques réactifs correspondent à la formule (I), dans laquelle A désigne le reste d'un composant diazoïque et X est un reste hétérocyclique qui réagit avec des fibres. On prépare ces colorants en saponifiant des colorants azoïques maléinylés de la formule (IV), puis en les faisant réagir avec des composants réactifs de la formule X-hal, sans les isoler auparavant. Les autres substituants ont la signification donnée dans la description.

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