Dyes incorporating anionic and cationic groups

Details Dyes incorporating anionic and cationic groups Dyes incorporating anionic and cationic groups

C - Chemistry, Metallurgy

09

B

C09B 43/16 (2006.01) C09B 44/02 (2006.01) D21H 21/28 (2006.01)

Patent

CA 2452522

The present invention relates to novel compounds of the formulae [insert formula here] A, D1, D2, R1 and n are as defined in the description the compounds being in an internal or external salt form, or mixtures of compounds (1) and (2), a process for their preparation and preparations containing them used for dyeing paper.

L'invention porte sur des nouveaux composés représentés par les formules (1) ou (2) [inserer formule] dans lequelles A, D¿1?, D¿2?, R¿1? et n sommes comme definis dans la description. Ces composés se présentant sous une forme de sel interne ou externe, ou de mélanges des composés (1) et (2). L'invention porte aussi sur un procédé de préparation de ces composés et sur des préparations les contenant et utilisées dans la coloration du papier.

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