Concentrated water solutions of a cationic dye, and...

C - Chemistry – Metallurgy – 09 – B

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8/49, 260/171.7

C09B 67/36 (2006.01) C09B 44/18 (2006.01) C09B 67/34 (2006.01) D06P 1/08 (2006.01)

Patent

CA 1123430

ABREGE DESCRIPTIF L'invention a pour objet des solutions concentrées aqueuses acides du colorant de formule: Image dans laquelle A ? représente l'anion formiate, acétate ou propionate. Ces solutions sont préparées à partir du chlorure ou sulfométhylate correspondant par formation du m- ou p-nitro- benzoate, dissolution de ce sel dans l'acide formique, acéti- que ou propionique et élimination de l'acide nitrobenzoïque précipité. Les solutions selon l'invention sont utilisables pour la teinture et l'impression des fibres contenant des groupes acides, en particulier des fibres acryliques.

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