| 摘要 |
Aqueous stable dispersion of UV-absorbing 2-(2'-hydroxyphenyl)benzotriazole compounds containing (a) 15 to 50 per cent by weight of a benzotriazole compound of the formula <IMAGE> (1) where R is halogen, C1-C12alkyl, lower alkoxy, lower alkoxycarbonyl, cycloalkyl, aryl, C1-C12alkylaryl or aralkyl, and the rings A and B can be further substituted independently of one another by halogen, hydroxyl, lower alkyl, lower alkoxy or lower alkoxycarbonyl, and (b) 2 to 20 per cent by weight of an acid ester, or salt thereof, of an alkylene oxide adduct of the formula <IMAGE> (2) where X is the acid radical of an inorganic oxygen-containing acid, or else the radical of an organic acid and Y is C1-C12alkyl, aryl or aralkyl, "Alkylen" is the ethylene radical or propylene radical, and m is from 1 to 4 and n from 4 to 50. These dispersions are excellent agents for improving the light fastness of dyeings of synthetic fibres, in particular polyester fibres or acid-modified polyester fibres.
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