| 摘要 |
This invention is directed to method for improving the dry strength of a paper product using a single cationic dispersion polymer strength additive, wherein the cationic dispersion polymer is prepared by polymerizing in an aqueous solution of a polyvalent anionic salt in the presence of a dispersant:i. a cationic diallyl-N,N-disubstituted ammonium halide monomer of formula wherein R1 and R2 are independently C1-C20 alkyl, aryl or arylalkyl and X is an anionic counterion andii. an acrylamide monomer of formula wherein R3and R4 are independently hydrogen, C1-C10 alkyl, aryl or arylalkyl; R5 is hydrogen or methyl and R6 and R7 are independently hydrogen or C1-C10 alkyl.
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