Mixtures of sulfo-containing 1:2 metal complexes with vinyl polymers
AssigneeBASF SE
InventorsKnut Kessel, Manfred Patsch, Manfred Herrmann, Kurt Reiner, Jorg Jessen, Matthias Wiesenfeldt
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Abstract
Liquid or solid mixtures of low-salt sulfo-containing 1:2 metal complex dyes and poly-N-vinylpyrrolidone or copolymers of N-vinylpyrrolidone and vinyl acetate are especially useful for dyeing paper and wood and also for dyeing and finishing leather and fur.
Claims12
A process for dyeing a substrate selected from the group consisting of wood, paper, leather and fir, comprising contacting said substrate with a liquid mixture comprised of a 1:2 metal complex dye which contains a sulfonic acid group or a salt thereof, and poly-N-vinylpyrrolidone or a copolymer of N-vinylpyrrolidone and vinyl acetate;
- and a solvent, wherein said 1:2 metal complex dye contains less than 3% by weight salt.
A process for dyeing a substrate selected from the group consisting of wood, paper, leather and fur, comprising dissolving a solid mixture comprising a 1:2 metal complex dye which contains a sulfonic acid group or a salt thereof and poly-N-vinylpyrrolidone or a copolymer of N-vinylpyrrolidone and vinyl acetate, with a solvent, to form a liquid mixture and contacting the substrate with the liquid mixture, wherein said 1:2 metal complex dye contains less than 3% by weight salt.
Dependencies are inferred from the claim text.