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    71.
    发明专利
    未知

    公开(公告)号：DE102004027735A1

    公开(公告)日：2005-12-22

    申请号：DE102004027735

    申请日：2004-06-07

    Applicant: BASF AG

    Inventor： KUKULA HILDEGARD ,  ETTL ROLAND ,  DYLLICK-BRENZINGER RAINER ,  STURM BERNHARD

    IPC: C08F2/06 ,  C08F212/08 ,  C08F212/10 ,  C08F220/34 ,  C08F220/36 ,  C08F220/60 ,  C08F257/02 ,  C14C11/00 ,  D21H11/14 ,  D21H17/37 ,  D21H17/45 ,  D21H21/16 ,  C08F291/12 ,  C14C9/00 ,  D21H17/20 ,  C09J133/14

    Abstract: Finely divided, amphoteric, aqueous polymer dispersions which are obtainable by a two-stage polymerization, a prepolymer being prepared in the first polymerization stage from a monomer mixture comprising (a) from 15 to 40% by weight of at least one (meth)acrylate and/or (meth)acrylamide having in each case a free amino group, protonated amino group and/or quaternized amino group, (b) from 40 to 70% by weight of at least one optionally substituted styrene, (c) from 0 to 25% by weight of acrylonitrile and/or methacrylonitrile, (d) from 0.5 to 5% by weight of at least one ethylenically unsaturated monomer comprising acid groups and (e) from 0 to 30% by weight of at least one nonionic, ethylenically unsaturated monomer differing from (b) and (c), the sum of (a)+(b)+(c)+(d)+(e) being 100% by weight, in a solution polymerization in a solvent partly to completely miscible with water, water then being added to the solution/dispersion of the prepolymer and then at least one nonionic, ethylenically unsaturated monomer being subjected to an emulsion polymerization in the aqueous solution of the prepolymer in a second polymerization stage, processes for the preparation of the polymer dispersions by two-stage polymerization and use of the polymer dispersions as sizes for paper, board and cardboard.

    80.
    发明专利
    未知

    公开(公告)号：ES2119568T3

    公开(公告)日：1998-10-01

    申请号：ES96904005

    申请日：1996-02-07

    Applicant: BASF AG

    Inventor： ETTL ROLAND ,  LORENCAK PRIMOZ ,  SCHERR GUENTER ,  REUTHER WOLFGANG ,  GLAS GUENTHER

    IPC: C08G73/04 ,  C09K23/52 ,  D21H17/03 ,  D21H17/17 ,  D21H17/34 ,  D21H17/56 ,  D21H21/16 ,  D21H17/72

    Abstract: PCT No. PCT/EP96/00500 Sec. 371 Date Aug. 19, 1997 Sec. 102(e) Date Aug. 19, 1997 PCT Filed Feb. 7, 1996 PCT Pub. No. WO96/26318 PCT Pub. Date Aug. 29, 1997Aqueous alkyldiketene dispersions which contain a C14-C22-alkyldiketene and from 1 to 10% by weight of a polymeric protective colloid contain, as the protective colloid (a) copolymers of (1) N-vinylpyrrolidone and (2) at least one quaternized N-vinylimidazole or a substituted quaternized N-vinylimidazole as polymerized units in a molar ratio of from 80:20 to 5:95 and have a K value of at least 20 (according to H. Fikentscher in 0.5 M aqueous sodium chloride solution at a polymer concentration of 0.1% by weight and at 25 DEG C.) or (b) condensates which are obtainable by (1) partial amidation of polyethyleneimines with monocarboxylic acids and, if required (2) condensation of the partially amidated polyethyleneimines with at least bifunctional crosslinking agents which have a halohydrin, glycidyl, aziridine or isocyanate unit or a halogen atom as a functional group to give crosslinked, amidated polyethyleneimines which have a viscosity of at least 100 mPa.s in 20% strength by weight aqueous solution at 20 DEG C., or mixtures of (a) and (b) and are used as engine size in the production of paper, board and cardboard and for rendering cellulosic fibers water-repellent.

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