Water soluble powdered cationic polyelectrolyte comprising a copolymer of acrylamide and dimethylaminopropylacrylamide essentially free of bifunctional compounds
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United States of America Patent
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Apr 30, 1996
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Sep 13, 1993
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Dec 19, 1985
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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.
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