METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD
    5.
    发明申请
    METHOD FOR PRODUCING HIGH DRY STRENGTH PAPER, PAPERBOARD OR CARDBOARD 有权
    生产高强度纸张,纸板或纸板的方法

    公开(公告)号:US20090145566A1

    公开(公告)日:2009-06-11

    申请号:US11719826

    申请日:2005-11-21

    IPC分类号: D21H17/34

    摘要: The invention relates to a process for producing paper, board and cardboard of high dry strength by separately adding a polymer comprising vinylamine units and a polymeric anionic compound to a paper pulp, dewatering the pulp and drying the paper products, which comprises using as polymeric anionic compound at least one copolymer obtainable by copolymerizing (a) at least one N-vinylcarboxamide of the formula in which R1 and R2 are H or C1- to C6 alkyl, (b) at least one monoethylenically unsaturated monomer comprising acid groups, and/or the alkali metal, alkaline earth metal or ammonium salts thereof, and if appropriate (c) other monoethylenically unsaturated monomers, and if appropriate (d) compounds having at least two ethylenically unsaturated double bonds in their molecule.

    摘要翻译: 本发明涉及通过将包含乙烯胺单元和聚合阴离子化合物的聚合物分别加入到纸浆中,使纸浆脱水和干燥纸产品来生产高干燥强度的纸,纸板和纸板的方法,其包括使用聚合阴离子 通过共聚合(a)至少一种下式的N-乙烯基甲酰胺,其中R 1和R 2是H或C 1 -C 6烷基,(b)至少一种包含酸基的单烯属不饱和单体和/或 (c)其它单烯属不饱和单体,如果合适的话(d)在其分子中具有至少两个烯属不饱和双键的化合物。