AQUEOUS PIGMENT DISPERSIONS AND THEIR USE IN THE PRODUCTION OF FILLED PAPER

    公开(公告)号:CA2171725A1

    公开(公告)日:1995-04-20

    申请号:CA2171725

    申请日:1994-10-06

    Applicant: BASF AG

    Abstract: Aqueous pigment slurries which contain up to 80 % by weight of a finely divided pigment in dispersed form and from 0.1 to 5 % by weight of a polyalkylenepolyamine having a molecular weight of at least 300 or water-soluble reaction products of (a) polyalkylenepolyamines having a molecular weight of at least 300 and/or polyamidoamines grafted with ethyleneimine and (b) bifunctional or polyfunctional crosslinking agents which have a halohydrin, glycidyl, aziridine or isocyanate unit or a halogen atom as a functional group, the reaction products, in 25 % strength by weight aqueous solution at 20.degree.C, having a viscosity of at least 100 mPa.s, are used as an additive to the paper stock in the production of fillercontaining paper.

    30.
    发明专利
    未知

    公开(公告)号:DE3864938D1

    公开(公告)日:1991-10-24

    申请号:DE3864938

    申请日:1988-07-19

    Applicant: BASF AG

    Abstract: In the prodn. of paper, paperboard and cardboard with high dry strength by adding a dry strength agent (I) to the pulp and dewatering, with sheet formation, the novelty is that (I) is an aq. soln. of mixts. of enzymatically degraded starches (II) with a viscosity of 20-2000 mPa.s (in 7.5% aq. soln. at 45 deg.C) and cationic polymers (III) derived from (a) diallyldimethylammonium chloride (IV), (b) N-vinylamine (V) or (c) N-vinylimidazolines of the formula (VI). R1 = H, 1-18C alkyl or C6H3R5R6; R5 and R6 = H, 1-4C alkyl or Cl; R2 = H, 1-18C alkyl, benzyl or glycidyl; R3 and R4 = H or 1-4C alkyl; X(-) = an acid gp.; which have a Fikentscher K value of min. 30 (In 5% aq. NaCl soln. at 25 deg.C and polymer concn. of 0.5wt.%).

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