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    32.
    发明专利
    未知

    公开(公告)号：DE50302436D1

    公开(公告)日：2006-04-20

    申请号：DE50302436

    申请日：2003-04-15

    Applicant: BASF AG

    Inventor： ETTL ROLAND ,  HAMERS CHRISTOPH ,  SCHMIDT-THUEMMES JUERGEN

    IPC: C08F4/40 ,  C08F251/00 ,  C08F212/08 ,  C08F236/04 ,  C08F251/02 ,  C08L51/02 ,  C09D151/02 ,  D21H17/35 ,  D21H21/16

    Abstract: Aqueous polymer dispersions which are obtainable by free radical copolymerization of (a) from 0.1 to 99.9% by weight of styrene and/or methylstyrene, (b) 0.1-99.9% by weight of 1,3-butadiene and/or isoprene and (c) from 0 to 40% by weight of other ethylenically unsaturated copolymerizable monomers, the sum of the monomers (a), (b) and (c) always being 100, in the presence of from 10 to 40% by weight, based on the monomers used, of at least one degraded starch having a molecular weight Mn of from 500 to 40 000 and of water-soluble redox catalysts are prepared by free radical copolymerization of the monomers (a), (b) and, if required, (c) in an aqueous medium in the presence of a degraded starch having a molecular weight Mn of from 500 to 10 000 and redox initiators and are used as engine sizes and surface sizes for paper.

    33.
    发明专利
    未知

    公开(公告)号：DE10300460A1

    公开(公告)日：2004-07-15

    申请号：DE10300460

    申请日：2003-01-07

    Applicant: BASF AG

    Inventor： SCHMIDT-THUEMMES JUERGEN ,  HARTMANN JUERGEN ,  TSCHANG CHUNG-JI

    IPC: C08F212/04 ,  C08F236/04 ,  C08F257/02 ,  C08F2/26 ,  C08F212/06 ,  C08F220/00 ,  C08F222/00

    Abstract: The present invention provides a process for preparing a stable aqueous copolymer dispersion by free-radically initiated aqueous emulsion polymerization of a) from 19.9 to 80 parts by weight of conjugated aliphatic dienes [monomers a)], b) from 19.9 to 80 parts by weight of vinylaromatic compounds [monomers b)], c) from 0.1 to 10 parts by weight of ethylenically unsaturated carboxylic acids and/or dicarboxylic acids [monomers c)], d) from 0 to 20 parts by weight of ethylenically unsaturated carbonitriles [monomers d)], and e) from 0 to 20 parts by weight of copolymerizable compounds other than monomers b) [monomers e)], the total amount of ethylenically unsaturated monomers a) to e) being 100 parts by weight, in the presence of water and from 0.1 to 5 parts by weight, based on the total monomer amount, of emulsifiers comprising f) sulfuric monoesters of ethoxylated fatty acid alcohols and/or g) salts of esters and monoesters of alkylpolyoxyethylenesulfosuccinates, from 15 to 85% by weight of the total emulsifiers used being added within the time taken to reach up to 40% of the total conversion of the monomers a) to e), and from 1 to 50% of the carboxylic acid groups deriving from the monomers c) being neutralized by addition of base.

    35.
    发明专利
    未知

    公开(公告)号：BR9815077A

    公开(公告)日：2000-10-03

    申请号：BR9815077

    申请日：1998-11-30

    Applicant: BASF AG

    Inventor： LEUBE HARTMANN F ,  SCHMIDT-THUEMMES JUERGEN ,  ZELLER EDGAR ,  MAAS HEIKO

    IPC: C08C19/02 ,  C08F8/04

    Abstract: A process for selectively hydrogenating ethylenically unsaturated double bonds in polymers P involves reacting the polymers P with hydrogen in the presence of at least one hydrogenation catalyst selected from the salts and complex compounds of rhodium and/or of ruthenium in an aqueous dispersion of the polymers P that comprises not more than 20% by volume of an organic solvent. This process can be used to give hydrogenated polymer dispersions and, from these dispersions, polymers. Also claimed are aqueous polymer dispersions comprising polymers P', which include structural units I, II and III as in claim 10, with or without structural units IV and/or V as in claim 11.

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