Vinyl formate copolymers, preparation thereof, and use thereof in detergents and cleaners

摘要

PCT No. PCT/EP95/02053 Sec. 371 Date Dec. 16, 1996 Sec. 102(e) Date Dec. 16, 1996 PCT Filed May 31, 1995 PCT Pub. No. WO95/34587 PCT Pub. Date Dec. 21, 1995Copolymers containing (a) from 5 to 90 mol % of vinyl formate units, (b) from 10 to 95 mol % of units of monoethylenically unsaturated carboxylic acids, (c) from 0 to 70 mol % of units of monoethylenically unsaturated dicarboxylic acids, and (d) from 0 to 30 mol % of units of other monoethylenically unsaturated monomers in copolymerized form and having K values of at least 8 (determined by the method of H. Fikentscher in 1% strength by weight aqueous solution on the sodium salt of the copolymers at pH 7 and 25 DEG C.), processes for their preparation by copolymerizing monomer mixtures of (a) from 5 to 90 mol % of vinyl formate, (b) from 10 to 95 mol % of monoethylenically unsaturated carboxylic acids, (c) from 0 to 70 mol % of monoethylenically unsaturated dicarboxylic acids, and (d) from 0 to 30 mol % of other monoethylenically unsaturated monomers in an aqueous medium or in an organic solvent in the presence of free-radical polymerization initiators and use of the vinyl formate copolymers and of the vinyl alcohol copolymers obtainable therefrom by hydrolysis and/or oxidation as detergent and cleaner additives.