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Glyoxalated copolymers of polyacrylamide with a high molecular weight and high cationic charge, and methods for their preparation and use
Glyoxalated copolymers of polyacrylamide with a high molecular weight and high cationic charge, and methods for their preparation and use
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机译:具有高分子量和高阳离子电荷的聚丙烯酰胺的乙二醛化共聚物及其制备和使用方法
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摘要
A cellulose reactive glyoxalated copolymer composition and methods of producing and using the glyoxalated copolymer composition to, for instance, strengthen paper or board are discussed. A glyoxalated copolymer composition includes an aqueous medium containing a glyoxalated copolymer, wherein the glyoxalated copolymer is obtained by reaction in an aqueous reaction medium of a dry weight ratio of glyoxalxationic copolymer. The cationic copolymer can have a weight average molecular weight of about 120,000 to about 1 million Daltons, the cationic copolymer can include diallyldimethylammonium halide monomer and acrylamide monomer, and a ratio a ratio of the weight average molecular weight of the cationic copolymer before glyoxalation to weight % of diallyldimethylammonium halide monomer making up the cationic copolymer before glyoxalation can be equal to or greater than 4,000 or range from 4,000 to 40,000 Daltons/weight %.
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