发明名称 FOERFARANDE FOER FRAMSTAELLNING AV PAPPER MED HOEG TORRHAOLLFASTHET OCH LAOG VAOTHAOLLFASTHET
摘要 <p>A process for the manufacture of paper having a high dry strength and a low wet strength, by treating the surface of the paper with an aqueous solution of an alkali metal and/or alkaline earth metal salt of a polymer of (a) from 91 to 100% by weight of acrylic acid and/or methacrylic acid and (b) from 0 to 9% by weight of acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, vinyl acetate, maleic anhydride, diisobutylene, an ester of acrylic acid and/or an ester of methacrylic acid, which has a viscosity of from 5 to 100 mPas in 2% strength aqueous solution at 20 DEG C., and drying the impregnated paper. The polymer is generally employed in an amount of from 1 to 4% by weight, based on dry paper, and increases the dry strength of the paper without substantially increasing the wet strength.</p>
申请公布号 FI64964(C) 申请公布日期 1984.02.10
申请号 FI19800000072 申请日期 1980.01.10
申请人 BASF AG 发明人 HARTMANN JUERGEN;STEDEFEDER JOACHIM;DENZINGER WALTER;PFOHL SIGBERG
分类号 D21H19/20;D21H17/43;(IPC1-7):D21H3/38 主分类号 D21H19/20
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