Preparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paper
作者： Walter Denzinger , Heinrich Hartmann , Sigberg Pfohl , Michael Kroener
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摘要: Water-soluble copolymers containing copolymerized vinylamine units are prepared by copolymerizing (a) from 95 to 10 mol % of N-vinylformamide and (b) 5 90 an ethylenically unsaturated monomer the group consisting vinyl acetate, propionate, C 1 -C 4 -alkyl ethers, esters, nitriles amides acrylic acid methacrylic N-vinylpyrrolidone, then eliminating 30 100 formyl groups copolymer. Preferred in which hydrolyzed. The used papermaking increase dry strength wet paper.
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