Use of vinylpyrrolidone and vinylimidazole copolymers as detergent additive, novel polymers of vinylpyrrolidone and of vinylimidazole and process for their preparation

摘要

Copolymers may be produced by radical-initiated copolymerisation of monomer mixtures composed of (a) 60 to 99 % by weight 1-vinylpyrrolidone, 1-vinylimidazole or their mixtures; (b) 1 to 40 % by weight nitrogenated, basic, ethylenically unsaturated monomers as free bases, salts or in quaternary form and if required (c) up to 20 % by weight of other monoethylenically unsaturated monomers. These copolymers are used as additives for washing agents to inhibit fading during washing. Also disclosed are washing agents containing such polymers, as well as polymers which may be produced by radical-initiated polymerisation of (a) 1-vinylpyrrolidone, 1-vinylimidazole, 1-vinylimidazolium compounds or their mixtures and if required (b) other nitrogenated, basic, ethylenically unsaturated monomers as free bases, salts or in quaternary form, and/or (c) other monoethylenically unsaturated monomers, in an aqueous medium in the presence of water-soluble proteins. A process is disclosed for preparing these polymers by polymerisation of the monomers (a) and if required (b) and/or (c) in an aqueous medium in the presence of water-soluble proteins. For 100 parts by weight of the monomers used for polymerisation, 0.5 to 400 parts by weight of proteins are used.