Triazinylaminostilbene derivative as fluorescent whitening agents

• Main Authors: Metzger, Georges, Hauger, Serge, Cuesta, Fabienne, Bulliard, Christophe, Rohringer, Peter, Grienenberger, Marc Roger
• Format: Patent
• Language: English
• Published: 20.04.2004

The present invention relates to new 4,4′-diaminostilbene-2,2′-disulfonic acid compounds which are useful as fluorescent whitening agents or for removing stain in photographic materials. The present invention relates to compounds having formula (): wherein each Rrepresents, independently, a linear C-C-alkylene residue which is unsubstituted or substituted by hydroxy, C-C-alkyl, C-C-alkoxy, C-C-hydroxy- or alkoxy-alkoxy, -OCOM, -OCOC-C-alkyl, or an amino acid residue from which a hydrogen atom on the amino group has been removed; each Rrepresents, independently, a linear C-C-alkylene residue which is unsubstituted or substituted by hydroxy, C-C-alkyl, C-C-alkoxy, C-C-hydroxy- or alkoxy-alkoxy, -OCOM, -OCOC-C-alkyl, -COM, COC-C-alkyl SOM or phenoxy which is unsubstituted or substituted by halogen, C-C-alkyl or C-C-alkoxy, -COM or COC-C-alkyl, NHor mono- or disubstituted amino; or phenyl which is unsubstituted or substituted by 1 to 3 SOM, SONHC-C-alkyl, -SONH, -COM, -COM, -COC-C-alkyl, -CONH, -CONHC-C-alkyl, -NHCOC-C-alkyl or mono- or disubstituted amino groups; each Rrepresents independently, hydrogen, C-C-alkyl, halogen, cyano, SOM, -SONH, SONHC-C-alkyl, -COM, -COC-C-alkyl, -CONH, -CONHC-C-alkyl, or -NHCOC-C-alkyl; M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine and m is an integer of 1 to 3, a process for their preparation and use of the compounds as optical brightening agents for synthetic or natural organic materials or for removing stain in photographic materials.