- Bis-triazinylaminostilbene compounds and their use as fluorescent brightening agents
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Bis-triazinylaminostilbene compounds of the formula STR1 in which R1 is alkyl, alkenyl, cyclohexyl or phenylalkyl, R2 is hydrogen, alkyl, cyclohexyl, benzyl, alkyl which is substituted by hydroxyl, cyano, sulpho or carbamoyl, alkoxyalkyl or hydroxyalkoxyalkyl or alkoxyalkoxyalkyl or mono- or di-alkylaminoalkyl, and R3 is hydrogen, alkyl, alkyl which is substituted by hydroxyl, cyano or sulpho, or alkoxyalkyl or hydroxyalkoxyalkyl or R2 and R3 together with the nitrogen atom to which they are bonded are a morpholine ring or a pyrrolidine, piperidine, hexamethyleneimine or piperazine ring which is unsubstituted or substituted by 1 or 2 alkyl groups, and M is hydrogen or an alkali metal, ammonium or amine ion, and, if R2 or R3 is hydroxyalkyl, R1 is methyl, cyclohexyl or alkenyl only, and their use as fluorescent brightening agents for organic material of high molecular weight are disclosed.
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