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    AQUEOUS POLYMER LATEX OF FILM-FORMING COPOLYMERS SUITABLE AS BINDER IN WATERBORNE COATING COMPOSITIONS
    2.
    发明申请
    AQUEOUS POLYMER LATEX OF FILM-FORMING COPOLYMERS SUITABLE AS BINDER IN WATERBORNE COATING COMPOSITIONS 审中-公开

    公开(公告)号：WO2022018013A1

    公开(公告)日：2022-01-27

    申请号：PCT/EP2021/070108

    申请日：2021-07-19

    Applicant: BASF SE

    Inventor： ROSCHMANN, Konrad ,  LOHMEIJER, Bastiaan ,  WOLF, Thomas ,  WILLERICH, Immanuel ,  WAGNER, Oliver ,  EICHHORN, Sabine ,  FLECKENSTEIN, Christoph ,  FLEISCHHAKER, Friederike ,  MISSKE, Andrea ,  SCHEUBLE, Martin Robert

    IPC: C08F220/18 ,  C08F2/26 ,  C09D133/08 ,  C08K3/22

    Abstract: The present invention relates to aqueous polymer latexes of film-forming copolymers which are suitable as binders in waterborne coating compositions, and are obtainable by aqueous emulsion polymerisation of ethylenically unsaturated monomers M, which comprise • 20 to 95% by weight, based on the total amount of monomers M, of at least one monomer Ml, which is selected from isobutyl acrylate and isoamyl acrylate and mixtures thereof; • 0 to 55% by weight, based on the total amount of monomers M, of at least one monomer M2, which is selected from ethyl acrylate, n- propyl acrylate, n-butyl acrylate, n-pentyl acrylate, C6-C20-alkyl esters of acrylic acid and C5-C20-alkyl esters of methacrylic acid and mixtures thereof; • 5 to 50% by weight, based on the total amount of monomers M, of at least one monomer M3, which is selected from tert-butyl acrylate, C1-C4-alkyl esters of methacrylic acid, C5-C20-cycloalkyl esters of acrylic acid, C5-C20-cycloalkyl esters of methacrylic acid, C5-C20-cycloalkylmethyl esters of acrylic acid,C5-C20- cycloalkylmethyl esters of methacrylic acid, where cycloalkyl in the aforementioned monomers is mono-, bi- or tricyclic and where 1 or 2 CH2 moieties of cycloalkyl may be replaced by O and where cycloalkyl may be unsubstituted or carry 1, 2, 3 or 4 methyl groups, and monovinyl aromatic monomers and mixtures thereof; • 0.05 to 4% by weight, based on the total amount of monomers M, of least one monomer M4, which is selected from monoethylenically unsaturated monomers having an acidic group; where the total amount of monomers M1 and M2 is in the range from 45 to 95% by weight, in particular 50 to 90% by weight, especially 55 to 85% by weight based on the total amount of ethylenically unsaturated monomers M, and where the total amount of monomers M1, M2 and M3 is at least 90% by weight, in particular at least 95% by weight, based on the total amount of ethylenically unsaturated monomers M.

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