Water soluble powdered cationic polyelectrolyte comprising a copolymer of acrylamide and dimethylaminopropylacrylamide essentially free of bifunctional compounds
AssigneeChemische Fabrik Stockhausen GmbH
InventorsHans-Georg Hartan, Alfons Landscheidt
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Abstract
A water-soluble, powdered, cationic polyelectrolyte comprising a copolymer of acrylamide and dimethylaminopropylacrylamide in which a) the dimethylaminopropylacrylamide is neutralized with mineral acids; b) the quotient of the intrinsic viscosity of the copolymers divided by the molar ratio of acrylamide to dimethylaminopropylacrylamide is greater than 200; and c) the proportion of the cationic monomers in the polymer is between 4 and 80 mol-%, the copolymer having been obtained by copolymerization of acrylamide and dimethylaminopropylacrylamide that is essentially free of bifunctional compounds.
Claims1
A water-soluble, powdered, cationic polyelectrolyte comprising a copolymer of acrylamide and dimethylaminopropylacrylamide in which
- a) the dimethylaminopropylacrylamide is neutralized with mineral acids;
- b) the quotient of the intrinsic viscosity of the copolymers divided by the molar ratio of acrylamide to dimethylaminopropylacrylamide is greater than 200;
- and
- c) the proportion of the cationic monomers in the polymer is between 4 and 80 mol-%,
- the copolymer having been obtained by copolymerization of acrylamide and dimethylaminopropylacrylamide that is essentially free of bifunctional compounds.
Dependencies are inferred from the claim text.