METHOD FOR PRODUCING A THERMODEFORMABLE POLYMER/FIBRE COMPOSITE

    公开(公告)号:US20250042103A1

    公开(公告)日:2025-02-06

    申请号:US18718851

    申请日:2022-12-05

    Applicant: BASF SE

    Abstract: The invention relates to a process for producing a thermoformable polymer/fiber composite using an aqueous dispersion of a polymer P and a fibrous substrate, where the dispersion is obtained by free-radically initiated emulsion polymerization of a monomer composition composed of 5% to 30% by weight of one or more monomers M1 selected from esters of acrylic and/or methacrylic acid with alkanols having 2 to 8 carbon atoms, 70% to 95% by weight of styrene and/or methyl methacrylate (M2), and 0% to 10% by weight of at least one further ethylenically unsaturated compound (M3) which is copolymerizable with monomers M1 and M2, based in each case on the total amount of the monomers M, in an aqueous medium in the presence of a polymer A or a polymer mixture A, where polymer A or polymer mixture A is formed from 40% to 70% by weight of acrylic acid (monomer A1), 30% to 60% by weight of maleic acid and/or maleic anhydride (monomer A2), 0% to 5% by weight of at least one further ethylenically unsaturated compound which is copolymerizable with monomers A1 and A2 (monomer A3), and where the total amounts of monomers A add up to 100% by weight, to the composites obtainable thereby, to the use thereof for production of polymer/fiber moldings, to the process for producing the moldings and to the moldings themselves, and to the aqueous polymer dispersion used in accordance with the invention and a process for production thereof.

    FIBER MOLDING
    5.
    发明申请
    FIBER MOLDING 审中-公开

    公开(公告)号:US20200369840A1

    公开(公告)日:2020-11-26

    申请号:US16882435

    申请日:2020-05-22

    Applicant: BASF SE

    Abstract: A process for producing a thermoformable and/or -embossable fiber/polymer composite using a fibrous lignocellulosic substrate S and a polymer P, which contains i) homogeneously mixing the substrate S and the polymer P, then ii) converting the substrate S/polymer P mixture to a fiber web, and then iii) compacting the resultant fiber web at a temperature not less than the glass transition temperature of the polymer P [TgP] to give a thermoformable and/or -embossable fiber/polymer composite, wherein a) the substrate S comprises acetylated lignocellulosic fibers, and b) the polymer P is thermoplastic and has a TgP≥20° C. The invention relates to a fiber/polymer molding obtainable by the process and a component in motor vehicle construction, in built structures and in furniture which contains the fiber/polymer molding.

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