Aqueous solutions of fluorescent whitening agents

摘要

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-alkyl or alkylthio, are distinguished by high solubility in water and by high storage stability of the aqueous solutions.