Process for improving the light fastness of polyamide dyeings with copper complexes of schiff bases or ortho-hydroxy benzophenone
AssigneeBayer Aktiengesellschaft
InventorsReinhard Preuss, Joachim Grutze, Ulrich Beck, Hellmuth Pantke, Karl Vogel
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Abstract
The light fastness of polyamide dyeings can be improved by treating polyamide fibre materials, before, during or after dyeing, with copper complexes of the reaction products of salicylaldehydes with amines (for example cyclohexylamine), or with copper complexes of o-hydroxybenzophenones.
Claims7
Process for improving the light fastness of polyamide dyeings, characterised in that polyamide fibre materials are treated, before, during or after dyeings with a metal complex dyestuff or an acid dyestuff with copper complexes of the reaction products of optionally substituted salicylaldehydes with alkylamines, aromatic diamines or hydrazine (I), and/or copper complexes of optionally substituted o-hydroxybenzophenones (II).
Dependencies are inferred from the claim text.