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    FEINTEILIGE, KATIONISCHE POLYMERDISPERSIONEN
    1.
    发明公开
    FEINTEILIGE, KATIONISCHE POLYMERDISPERSIONEN 有权
    佳作，阳离子聚合物分散体

    公开(公告)号：EP2102249A2

    公开(公告)日：2009-09-23

    申请号：EP07857376.3

    申请日：2007-12-11

    申请人： BASF SE

    发明人： BROCKMEYER, Andreas ,  LEMAN, Titus ,  ETTL, Roland

    IPC分类号： C08F2/28 ,  C08F220/44

    CPC分类号： C08F20/44 ,  C08F2/10 ,  C08F2/22 ,  C08F2/28 ,  C08F220/18 ,  C08F220/34 ,  C08F220/44 ,  C08F220/60 ,  C08F257/02 ,  C08F265/00 ,  C08F265/04 ,  C08F265/06 ,  C08F265/10 ,  C08L51/003 ,  C09D133/24 ,  C09D151/003 ,  D21H17/37 ,  D21H17/375 ,  D21H17/44 ,  D21H17/45 ,  D21H21/16 ,  C08L2666/04 ,  C08L2666/02

    摘要： The invention relates to fine-particle, cationic polymer dispersions that can be obtained by emulsion polymerisation of ethylenically unsaturated monomers in an aqueous solution of a cationic pre-polymer as a dispersant. First, a cationic pre-polymer is produced by the polymerisation of: a) between 10 and 45 wt. % of at least one (meth)acrylic acid ester comprising an amino group and/or a quarternary ammonium group, and/or a (meth)acrylic amide, carrying an amino group and/or a quaternary ammonium group, b) between 40 and 85 wt. % of at least one optionally substituted styrol, c) between 0 and 20 wt. % of acrylic nitrile or methacrylic nitrile, d) between 1 and 15 wt. % of at least one ethylenically unsaturated carboxylic acid or an ethylenically unsaturated carboxylic acid anhydride, and e) between 0 and 20 wt. % of at least one non-ionic, ethylenically unsaturated monomer different from the monomers (b) and (c), the sum of (a) + (b) + (c) + (d) + (e) amounting to 100 wt. %, in a solution polymerisation in an organic solvent that can be mixed with water. The solution of the pre-polymer produced in this way is diluted with water, and then an emulsion polymerisation of a monomer mixture of: i) between 30 and 80 wt. % of acrylic nitrile and/or methacrylic nitrile, ii) between 5 and 50 wt. % of at least one C1 to C4 alkyl acrylate or at least one C1 to C4 alkyl methacrylate, iii) between 5 and 50 wt. % of at least one C6 to C14 alkyl acrylate or at least one C6 to C14 alkyl methacrylate, and iv) between 0 and 20 wt. % of a non-ionic monomer diferent from the monomers (i), (ii) und (iii), the sum of (i) + (ii) + (iii) + (iv) amounting to 100 wt. %, is carried out in the aqueous solution of the pre-polymer, in the presence of water-soluble polymerisation inhibitors. The invention also relates to the use of the fine-particle cationic polymer dispersions obtained in this way as materials and surface sizing agents for paper, paperboard and cardboard.

    FEINTEILIGE, STÄRKEHALTIGE POLYMERDISPERSIONEN
    2.
    发明公开
    FEINTEILIGE, STÄRKEHALTIGE POLYMERDISPERSIONEN 审中-公开
    佳作，强度含聚合物分散体

    公开(公告)号：EP2121781A1

    公开(公告)日：2009-11-25

    申请号：EP07857375.5

    申请日：2007-12-11

    申请人： BASF SE

    发明人： BROCKMEYER, Andreas ,  LEMAN, Titus ,  ETTL, Roland

    IPC分类号： C08F220/00 ,  C08F2/24 ,  D21H17/34

    CPC分类号： C08F2/24 ,  C08F4/40 ,  D21H17/28

    摘要： The invention relates to fine-particulate polymer dispersions comprising starch, obtained by radically initiated emulsion copolymerization of ethylenically unsaturated monomers in the presence of a redox initiator and an enzymatically degraded starch, wherein the enzymatic degradation of starch is stopped by adding at least one acid comprising a phosphorus atom to the reaction mixture. According to the invention, at least one acid comprising a phosphorus atom is used in order to stop the enzymatic degradation of starch and the fine-particulate polymer dispersions comprising starch of emulsion polymers are used as sizing agents for paper and paper products, particularly as surface sizing agents.