Aqueous ink composition, water-soluble dye composition and...

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 11/00 (2006.01) B41J 2/01 (2006.01) C09B 33/12 (2006.01) C09B 56/04 (2006.01) C09B 67/22 (2006.01)

Patent

CA 2442714

An aqueous ink composition which comprises a compound represented by the formula (1) or the salt thereof :(1) wherein R1 and R2 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkanoylamino group, an alkoxyalkoxy group, a sulfonic acid group, a carboxyl group or an ureido group, m and n independently represent 1 or 2, and M1 represents a cation from a hydrogen atom, an alkali metal, an alkaline earth metal or an organic amine, or an ammonium ion. The composition has a hue and clarity suitable for the ink-jet recording, and can provide a recorded matter which is excellent in light resistance, water resistance and moisture resistance and can be controlled with respect to the degree of the discoloration or fading by the action of ozone.

L'invention concerne une composition d'encre aqueuse contenant un composé de la formule (I) dans laquelle R1 et R2 sont indépendamment un atome d'hydrogène, un groupe alkyle, un groupe alkoxy, un groupe alcanoylamino un groupe alkoxyalkoxy, un groupe acide sulfonique, un groupe carboxyl ou un groupe ureido ; m et n sont indépendamment 1 ou 2 ; et, M1 est un cation d'un atome d'hydrogène, d'un métal alcalin, d'un métal alcalino-terreux ou d'une amine organique, ou un ion ammonium. L'invention concerne également un sel de la composition selon l'invention. Ladite composition présente une teinte et une clarté adaptées à l'impression par jet d'encre, et permet d'obtenir un support imprimé présentant une excellente résistance à la lumière, à l'eau et à l'humidité, le degré de décoloration ou de blanchiment de ladite composition par l'ozone pouvant être commandé.

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