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    USE OF AQUEOUS POLYMER COMPOSITIONS AS STAINS FOR POROUS MATERIALS
    2.
    发明申请
    USE OF AQUEOUS POLYMER COMPOSITIONS AS STAINS FOR POROUS MATERIALS 有权

    公开(公告)号：US20250101248A1

    公开(公告)日：2025-03-27

    申请号：US18698054

    申请日：2022-09-26

    Applicant: BASF SE

    Inventor： Roelof BALK ,  Bastiaan LOHMEIJER ,  Oliver WAGNER ,  Konrad ROSCHMANN

    IPC: C09D15/00 ,  C08F8/28 ,  C08F220/18 ,  C09D5/02 ,  C09D133/06

    Abstract: The present invention relates to use of an aqueous polymer composition containing a water-soluble or water-dispersible polymer P made of polymerized ethylenically unsaturated monomers M comprising. 30 to 90 wt.-%, based on the total weight of monomers M, of at least one monomer M1 selected from C1-C12-alkyl esters of monoethylenically unsaturated carboxylic acids, C6-C10-cycloalkyl esters of monoethylenically unsaturated carboxylic acids and monovinylaromatic hydrocarbon monomers, 5 to 30 wt.-%, based on the total weight of monomers M, of at least one monomer M2 selected from monoethylenically unsaturated monomers containing at least one acid group, and 5 to 40 wt.-%, based on the total weight of monomers M, of at least one monomer M3 different from M2 which has a reactive functional group being capable of being crosslinked, wherein the total weight of monomers M1, M2 and M3 corresponds to at least 90% of the total weight of monomers M; wherein the monomers M are selected such that the theoretical glass transition temperature according to Fox (Tgt) of the polymer P is at most 80° C.; and wherein the polymer P is dissolved or dispersed in an aqueous phase such that the acid groups of the polymer P are totally or partially neutralized; as a staining composition for porous materials. The present invention also relates to an aqueous polymer composition containing said water-soluble or water-dispersible polymer P made of polymerized ethylenically unsaturated monomers M and a crosslinking agent.

    AQUEOUS POLYMER DISPERSION OF VOIDED POLYMER PARTICLES
    5.
    发明公开
    AQUEOUS POLYMER DISPERSION OF VOIDED POLYMER PARTICLES 审中-公开

    公开(公告)号：US20240076428A1

    公开(公告)日：2024-03-07

    申请号：US18284347

    申请日：2022-03-31

    Applicant: BASF SE

    Inventor： Konrad ROSCHMANN

    IPC: C08F212/08 ,  C08F2/10 ,  C08F220/18

    CPC classification number: C08F212/08 ,  C08F2/10 ,  C08F220/1811

    Abstract: The present invention relates to aqueous polymer dispersion of voided polymer particles and to a process for preparing such aqueous polymer dispersions. The present invention also relates to polymer particles, in particular powders of said polymer particles, which are obtained by drying a polymer dispersion. Further aspects of the present invention relate to the use of such voided polymer particles and the polymer dispersions as opacifiers and to paints containing such aqueous polymer dispersions. The voided polymer particles comprise: i) an alkali swellable polymer core of polymerized ethylenically unsaturated monomers M(i) comprising polymerized acid monomers M(i.ac) in an amount sufficient for allowing the polymer core to swell at a pH of at least pH 7.5; ii) an intermediate polymer layer of polymerized ethylenically unsaturated monomers M(ii); and iii) a polymer shell of polymerized ethylenically unsaturated monomers M(iii) having a theoretical glass transition temperature according to Fox of at least 60° C. where the monomers M(iii) comprise at least 10% b.w., based on the total weight of the monomers M(iii), of one or more monomers M(iii.a) whose homopolymers have a glass transition temperature of at least 50° C., where the monomer M(iii.a) is selected from the group consisting of 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 may be unsubstituted or carry 1, 2, 3 or 4 methyl groups; C3-C20-heterocycloalkyl esters of acrylic acid, C3-C20-heterocycloalkyl esters of methacrylic acid, C3-C20-heterocycloalkylmethyl esters of acrylic acid, C3-C20-heterocycloalkylmethyl esters of methacrylic acid, where heterocycloalkyl in the aforementioned monomers has a total of 5 to 16 ring-forming atoms, where 1, 2 or 3 non-adjacent ring-forming atoms are oxygen atoms while the remainder of the ring-forming atoms are carbon atoms, and where heterocycloalkyl is mono-, bi- or tricyclic and may be unsubstituted or carry 1, 2, 3 or 4 methyl groups; di-C1-C2-alkyl esters of itaconic acid; and combinations thereof.

    PROCESS FOR PREPARING AN AQUEOUS POLYMER DISPERSION
    10.
    发明申请
    PROCESS FOR PREPARING AN AQUEOUS POLYMER DISPERSION 有权

    公开(公告)号：US20250043052A1

    公开(公告)日：2025-02-06

    申请号：US18718076

    申请日：2022-12-14

    Applicant: BASF SE

    Inventor： Bastiaan LOHMEIJER ,  Konrad ROSCHMANN ,  Guenter ULPINS

    IPC: C08F220/14 ,  C09D133/12

    Abstract: The present invention relates to a process for preparing an aqueous polymer dispersion having a polymer content of at least 50 weight-% based on the total weight of the aqueous polymer dispersion, the process comprising preparing a stabilizer dispersion having a pH in the range of from 0 to 5; preparing said aqueous polymer. The present invention further relates to an aque-ous polymer dispersion obtained or obtainable by said process, use of said dispersion as well as a coating composition comprising said dispersion.

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