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    Method for preparing an aqueous polymer dispersion from a vinyl aromatic compound and a conjugated aliphatic diene
    6.
    发明授权
    Method for preparing an aqueous polymer dispersion from a vinyl aromatic compound and a conjugated aliphatic diene 有权

    公开(公告)号：US12098222B2

    公开(公告)日：2024-09-24

    申请号：US17299680

    申请日：2019-11-21

    申请人： BASF SE

    发明人： Nico Veling ,  Carmen-Elena Cimpeanu ,  Dirk Lawrenz

    IPC分类号： C08F2/22 ,  C08F2/38 ,  C08F212/08 ,  C08F220/06 ,  C08F222/02 ,  C08F236/06 ,  C08F236/08 ,  C08K5/14 ,  D21H19/58

    CPC分类号： C08F2/22 ,  C08F2/38 ,  C08F212/08 ,  C08F220/06 ,  C08F222/02 ,  C08F236/06 ,  C08F236/08 ,  C08K5/14 ,  D21H19/58 ,  C08F2800/20

    摘要： The present invention relates to a process for producing an aqueous polymer dispersion by free-radically initiated aqueous emulsion polymerization, by polymerizing, in an aqueous medium,



    (a) 40 to 75 parts by weight of at least one vinylaromatic compound and
    (b) 24.9 to 59.9 parts by weight of at least one conjugated aliphatic diene
    (c) 0.1 to 10 parts by weight of at least one monomer comprising acid groups and
    (d) 0 to 20 parts by weight of at least one other monoethylenically unsaturated monomer,
    the amounts of the monomers (a) to (d) adding up to 100 parts by weight,
    in a monomer feed process in the presence of at least one inorganic peroxide and at least one organic peroxide, with the proviso that
    the continuous metering of the inorganic peroxide starts at the same time as the continuous metering of the vinylaromatic compound,
    the metering of the organic peroxide is started at a time at which at least 5% and not more than 20% of the vinylaromatic compound has already been metered in in a continuous mass flow under polymerization conditions and
    optionally a portion of the inorganic peroxide is initially charged,
    and also to the aqueous polymer dispersions produced by the process and to the use of these as a binder, adhesive, sizing agent for fibers, for the production of coatings or for the production of a paper coating slip.

    THERMALLY STABLE HYDROCARBON-BASED ANION EXCHANGE MEMBRANE AND IONOMERS
    9.
    发明公开
    THERMALLY STABLE HYDROCARBON-BASED ANION EXCHANGE MEMBRANE AND IONOMERS 审中-公开

    公开(公告)号：US20240286123A1

    公开(公告)日：2024-08-29

    申请号：US18607624

    申请日：2024-03-18

    申请人： RENSSELAER POLYTECHNIC INSTITUTE

    发明人： Sangwoo LEE ,  Chulsung BAE ,  Carrie Lynn TRANT

    IPC分类号： B01J41/14 ,  C08F212/08 ,  C08F212/32 ,  C08J5/22

    CPC分类号： B01J41/14 ,  C08F212/08 ,  C08F212/32 ,  C08J5/2231 ,  C08J2325/08

    摘要： An anion exchange membrane is composed of a copolymer of 1,1-diphenylethylene and one or more styrene monomers, such as 4-tert-butylstyrene. The copolymer includes a backbone substituted with a plurality of ionic groups coupled to phenyl groups on the backbone via hydrocarbyl tethers between about 1 and about 7 carbons in length. High-temperature conditions enabled by these copolymers enhance conductivity performance, making them particularly suitable for use in anion exchange membranes in fuel cells, electrolyzers employing hydrogen, ion separations, etc. The properties of the membranes can be tuned via the degree of functionalization of the phenyl groups and selection of the functional groups, such as quaternary ammonium groups. Several processes can be used to incorporate the desired ionic functional groups into the polymers, such as chloromethylation, radical bromination, Friedel-Crafts acylation and alkylation, sulfonation followed by amination, or combinations thereof.

    Polythiophene/Polyanion Compositions
    10.
    发明公开
    Polythiophene/Polyanion Compositions 审中-公开

    公开(公告)号：US20240279453A1

    公开(公告)日：2024-08-22

    申请号：US18567187

    申请日：2022-06-03

    申请人： Agfa-Gevaert NV

    发明人： Roald Herckens ,  Johan Loccufier

    IPC分类号： C08L25/18 ,  C08F212/32 ,  H01G9/00 ,  H01G9/028

    CPC分类号： C08L25/18 ,  C08F212/32 ,  H01G9/0036 ,  H01G9/028 ,  C08L2201/50 ,  C08L2203/20 ,  C08L2205/02

    摘要： A polythiophene dispersion including: (a) a polythiophene copolymer of a first monomer according to Formula I and a second monomer to Formula II, wherein A represents a substituted or unsubstituted C1 to C5 alkylene bridge further functionalized with at least one functional group selected from the group consisting of a sulfonic acid or salt thereof, a phosphonic acid or salt thereof, a phosphate ester or salt thereof, a sulfate ester or salt thereof and a carboxylic acid or salt thereof; B represents a substituted or unsubstituted C1 to C5 alkylene bridge with the proviso that B is not further functionalized with a pH responsive group; and a molar ratio of the first monomer to the second monomer is from 1/4 to 4/1, (b) a polymeric polyanion wherein at least 75 mol % of the monomeric units of the polymeric polyanion are functionalized with a functional group selected from the group consisting of a sulfonic acid or salt thereof, a phosphonic acid or salt thereof, a phosphate ester or salt thereof, a sulfate ester or salt thereof and a carboxylic acid or salt thereof, characterized in that a molar ratio of the functional groups of the polyanion to the sum of the first and second monomers of the polythiophene copolymer is from 1.1 to 1.75.