Aqueous solutions of fluorescent whitening agents

D - Textiles – Paper – 21 – H

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D21H 21/30 (2006.01) C11D 3/42 (2006.01) D06L 3/12 (2006.01)

Patent

CA 2534896

Compositions comprising (A) a total of from 2 to 30 % by weight, based on the total composition (A) + (B), of one or more amino alcohols of formula (1) herein R1, R2, R3 and R4 are each independently of the others hydrogen, C1- C12alkyl, C5-C24aryl or C6-C36aralkyl, and R5 and R6 are each independently of the other hydrogen or C1-C4alkyl; and (B) from 70 to 98 % by weight, based on the total composition (A) + (B), of a fluorescent whitening agent of formula (2) herein X is hydrogen, an alkali metal ion, an ammonium ion or a hydroxyalkylammonium radical derived from the amino alcohol of formula (1), and R7, R8, R9 and R10 are each independently of the others -OR11, -NR11R12 or a group of formula (3) wherein R11, and R12 are each independently of the other hydrogen, alkyl, hydroxyalkyl, alkoxyalkyl, carboxyalkyl, dicarboxyalkyl, H2N-CO-alkyI or alkylthio, are distinguished by high solubility in water and by high storage stability of the aqueous solutions.

L'invention porte sur des compositions comprenant: (A) un total de 2 à 30 % en poids de la composition totale (A) + (B), d'un ou plusieurs alcools amino de formule (1) dans laquelle: R¿1?, R¿2?, R¿3? et R¿4? sont chacun indépendamment des autres hydrogène, C¿1?-C¿12?alkyle, C¿5?-C¿24?aryle ou C¿6?-C¿36?aralkyle, et R¿5? et R¿6? sont chacun indépendamment des autres hydrogène ou C¿1?-C¿4?alkyle; et (B) de 70 à 98 % en poids de la composition totale (A) + (B), d'un agent blanchissant fluorescent de formule (2) dans laquelle: X est hydrogène, un ion de métal alcalin, un ion d'ammonium ou un radical hydroxyalkylammonium dérivant d'un alcool amino de formule (1), et R¿7?, R¿8?, R¿9? et R¿10? sont chacun indépendamment des autres -OR¿11?, -NR¿11?R¿12? ou un groupe de formule (3) dans laquelle: R¿11?, et R¿12? sont chacun indépendamment des autres hydrogène, alkyle, hydroxyalkyle, alcoxyalkyle, carboxyalkyle, dicarboxyalkyle, H¿2?N-CO-alkyIe ou alkylthio. Lesdites compositions se distinguent par leur solubilité élevée dans l'eau et par la bonne stabilité au stockage de leurs solutions aqueuses.

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