Process for improving the photochemical stability of dyeings on polyester fibre materials
AssigneeCiba-Geigy Corporation
InventorsGerhard Reinert, Kurt Burdeska
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Abstract
A process is described for improving the photochemical stability of dyeings on polyester fibre materials by means of UV absorbers of the formula ##STR1## in which R is lower alkyl, lower alkoxy, halogen or hydroxyl, R.sub.1 and R.sub.2 independently of one another alkyl which is substituted by hydroxyl, lower alkoxy, lower alkylthio, amino, monoalkylamino or dialkylamino, phenyl, phenyl which is substituted by chlorine, lower alkyl or lower alkoxy, or o-hydroxyphenyl, and n is 0, 1 or 2.
Claims6
A process for improving the photochemical stability of dyeings on polyester fibre materials by means of UV absorbers, which comprises treating the fibre material with a compound of the formula ##STR5## in which R is lower alkyl, lower alkoxy, halogen or hydroxyl, R.sub.1 and R.sub.2 independently of one another are alkyl, alkyl which is substituted by hydroxyl, lower alkoxy, lower alkylthio, amino, monoalkylamino or dialkylamino, phenyl, phenyl which is substituted by chlorine, lower alkyl or lower alkoxy, or o-hydroxyphenyl, and n is 0, 1 or 2.
Dependencies are inferred from the claim text.