Pigmentary azo composition, preparation method and use

Details Pigmentary azo composition, preparation method and use Pigmentary azo composition, preparation method and use

C - Chemistry, Metallurgy

09

B

C09B 67/22 (2006.01) C09B 29/33 (2006.01) C09D 11/02 (2006.01)

Patent

CA 2275778

The invention concerns a transparent pigmentary composition for preparing ink characterised in that it is obtained by coupling with acetylaceto-2-anisidide a mixture of diazonium salts obtained from 98 to 85 mol % of 2- methoxy-4- nitro-aniline and 2 to 15 mol % of 4-chloro-2-nitro-aniline. The invention also concerns a method for preparing such a composition and their uses in printing inks or as pigmentary concentrates for making printing ink.

La présente invention concerne une composition pigmentaire transparente pour encre caractérisée en ce qu'elle est obtenue par copulation avec l'acétylacéto-2-anisidide d'un mélange de sels de diazonium obtenus à partir de 98 à 85 % en moles de 2-méthoxy-4-nitro-aniline et de 2 à 15 % en moles de 4-chloro-2-nitro-aniline. La présente invention concerne également un procédé de préparation d'une telle composition et les utilisations en encres d'imprimerie ou concentrés pigmentaires destinés à la fabrication d'encre d'imprimerie.

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