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    PROCESS FOR PRODUCING AN AQUEOUS POLYMER DISPERSION
    2.
    发明公开
    PROCESS FOR PRODUCING AN AQUEOUS POLYMER DISPERSION 审中-公开

    公开(公告)号：US20230348633A1

    公开(公告)日：2023-11-02

    申请号：US17629816

    申请日：2020-07-24

    Applicant: BASF SE

    Inventor： Xavier MOLLAT DU JOURDIN ,  Joost LESWIN ,  Michaela REINSCH ,  Nicole SPECHT ,  Janine EINHORN-RECH ,  Joerg Alexander DIMMER ,  Rainer PACHE ,  Jochen GATTERMAYER ,  Hans-Juergen DENU

    IPC: C08F2/22 ,  C08F2/00 ,  C08F2/38 ,  C08F220/18 ,  C08F220/06 ,  C08F220/14 ,  C08K5/37 ,  C08K5/14 ,  C09D133/12

    CPC classification number: C08F2/22 ,  C08F2/001 ,  C08F2/38 ,  C08F220/1804 ,  C08F220/06 ,  C08F220/14 ,  C08K5/37 ,  C08K5/14 ,  C09D133/12 ,  C08F2800/20

    Abstract: The present application relates to a process for producing an aqueous polymer dispersion of polymerized ethylenically unsaturated monomers M by a multistage aqueous radical emulsion polymerization comprising a first aqueous radical emulsion polymerization step of a first monomer composition M.a and subsequently a further aqueous radical emulsion polymerization step of a second monomer composition M.b. The present application also relates to aqueous polymer dispersions obtainable by such a process and to the use thereof, in particular as a binder in coating compositions. The process comprises a multistage aqueous radical emulsion polymerization of ethylenically unsaturated monomers M, comprising a) at least one non-ionic, monoethylenically unsaturated monomer M1 having a solubility in deionized water of at most 60 g/L at 25° C. and 1 bar, b) at least one monoethylenically unsaturated monomer M2 selected from monomers having an acid group and their salts, and c) optionally one or more ethylenically unsaturated monomers M3, which are different from the monomers M1 and M2, where the process comprises i) a first step of an aqueous radical emulsion polymerization of a first monomer composition M.a consisting of monomers M1, M2 and optionally M3, to obtain a first aqueous polymer dispersion, where the monomer composition M.a comprises at most 2% by weight, in particular at most 1.5% by weight and especially at most 1.5% by weight or at most 1.0% by weight, based on the total weight of the monomers of the monomer composition M.a, of monomers M2, and subsequently ii) at least one further aqueous radical emulsion polymerization step of a second monomer composition M.b consisting of monomers M1, M2 and optionally M3, where the second step is performed in the aqueous polymer dispersion of the first step and in the presence of a chain transfer agent T, where the monomer composition M.b comprises 2 to 20% by weight, in particular from 5 to 18% by weight and especially from 8 to 16% by weight, based on the total weight of the monomers of the monomer composition M.b, of at least one monomer M2, where the weight ratio of the total weight of monomers of monomer composition M.a to the total weight of monomers of monomer composition M.b is in the range from 10:90 to 90:10, in particular in the range from 50:50 to 87:13, especially in the range from 60:40 to 85:15.

    LATEX PAINT CONTAINING TITANIUM DIOXIDE PIGMENT
    4.
    发明申请
    LATEX PAINT CONTAINING TITANIUM DIOXIDE PIGMENT 有权

    公开(公告)号：US20210163779A1

    公开(公告)日：2021-06-03

    申请号：US16336565

    申请日：2017-10-06

    Applicant: BASF SE

    Inventor： Immanuel WILLERICH ,  Volodymyr BOYKO ,  Bernd RECK ,  Jules MIKHAEL ,  Joost LESWIN ,  Matthias MAIER ,  Tanja ROST ,  Markus RUECKEL

    IPC: C09D151/00 ,  C09D5/02

    Abstract: The present invention relates to latex paints, which contain a) a multistage carboxylated polymer latex binder obtainable by multistage aqueous emulsion polymerisation of a monomer composition M consisting of at least one non-ionic monomer M1, which is selected from C1-C20-alkyl esters of acrylic acid, C1-C20-alkylesters of methacrylic acid, and vinyl aromatic monomers; one or more monoethylenically unsaturated monomers M2, which are selected from monoethylenically unsaturated monocarboxylic acids having 3 to 6 carbon atoms and monoethylenically unsaturated dicarboxylic acids having 4 to 6 carbon atoms, and optionally one or more non-ionic monomers M3, which are different from monomers M1; where in at least one stage, the relative amount of monomers M2 in added in this stage is at least 6% by weight, based on the total amount of monomers added in said stage, the total amount of monomers M2 being from 0.05 to 5% by weight, based on the total amount of the monomer composition M; b) a titanium dioxide pigment; c) a polymeric dispersant PD which is selected from homo and copolymers of monomers M4, which are selected from monoethylenically unsaturated monocarboxylic acids having 3 to 6 carbon atoms and monoethylenically unsaturated dicarboxylic acids having 4 to 6 carbon atoms, where the monomers M4 make up at least 85% of the monomers forming the polymeric dispersant; and d) an associative thickener polymer.

    PROCESS FOR PREPARING AN AQUEOUS POLYMER LATEX
    5.
    发明申请
    PROCESS FOR PREPARING AN AQUEOUS POLYMER LATEX 审中-公开

    公开(公告)号：US20190144585A1

    公开(公告)日：2019-05-16

    申请号：US16098010

    申请日：2017-05-03

    Applicant: BASF SE

    Inventor： Tanja ROST ,  Roelof BALK ,  Immanuel WILLERICH ,  Sebastian ENCK ,  Joost LESWIN ,  Wolfgang GASCHLER ,  Martin Robert SCHEUBLE

    IPC: C08F220/18 ,  C08F220/06 ,  C08F212/08 ,  C08F2/22 ,  C08K3/22 ,  C09D133/02 ,  C09D133/12

    Abstract: Disclosed herein is a process for preparing an aqueous polymer latex by polymerising a monomer composition M by a radical emulsion polymerisation, where at least 95% of the monomer composition M is metered during a period P to the polymerisation reaction under polymerisation conditions, such that during at least one period P(n) within the period P, the relative amount of monomers M2, which are metered to the polymerisation reaction during the periods P(n), to the total amount of the monomer composition M, which is metered to the polymerisation reaction during said period P(n), is at least 1% by weight higher than the relative amount of monomers M2, which are metered to the polymerisation reaction outside of each of said periods P(n), to the total amount of the monomer composition M, which is metered to the polymerisation reaction outside of each of said periods P(n).

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