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    Oxazoline-containing aqueous polymer dispersions for composite film lamination
    2.
    发明授权
    Oxazoline-containing aqueous polymer dispersions for composite film lamination 有权

    公开(公告)号：US10364379B2

    公开(公告)日：2019-07-30

    申请号：US15558326

    申请日：2016-03-08

    Applicant: BASF SE

    Inventor： Matthias Zorn ,  Karl-Heinz Schumacher

    IPC: C09J139/04 ,  C08F265/06 ,  C09D151/00 ,  C09J137/00

    Abstract: Described are aqueous polymer dispersions for composite film lamination and a multistage process for preparing them from ethylenically unsaturated, radically polymerizable monomers. In a first stage, a first polymer is prepared by radical emulsion polymerization. In a further stage, an aqueous polymer dispersion is prepared in the presence of the first polymer. The monomers of the first stage comprise monomers with acid groups. The monomers of the further stage comprise monomers having oxazoline groups. The polymerization of the first stage takes place at a low pH of less than 5. The acid groups of the first polymer are neutralized before the polymerization of the further stage. The aqueous polymer dispersions can be used as adhesives for producing composite films.

    Use of a single-component laminating adhesive for composite film lamination
    4.
    发明授权
    Use of a single-component laminating adhesive for composite film lamination 有权

    公开(公告)号：US11015091B2

    公开(公告)日：2021-05-25

    申请号：US16069320

    申请日：2017-01-10

    Applicant: BASF SE

    Inventor： Karl-Heinz Schumacher ,  Christine Tonhauser ,  Christoph Kiener ,  Peter Preishuber-Pfluegl ,  Andrea Kuntz

    IPC: C09J133/10 ,  B32B7/12 ,  B32B27/36 ,  C09J133/06 ,  B32B27/30 ,  C09J4/00 ,  B32B23/04 ,  B32B15/08 ,  B32B27/32 ,  B32B27/34 ,  B32B15/20 ,  B32B27/08 ,  B32B23/08 ,  B32B15/088 ,  B32B27/16 ,  B32B27/28 ,  B32B27/06 ,  B32B15/085 ,  B32B15/09 ,  B32B37/12 ,  C09J133/08

    Abstract: A description is given of the use of a one-component laminating adhesive for composite film lamination, and also of a method for composite film lamination. The laminating adhesive comprises an aqueous polymer dispersion preparable by radical emulsion polymerization of monomers comprising (a) at least 60 wt %, based on the total amount of monomers, of at least one monomer selected from the group consisting of C1 to C20 alkyl acrylates, C1 to C20 alkyl methacrylates, vinyl esters of carboxylic acids comprising up to 20 carbon atoms, vinylaromatics having up to 20 carbon atoms, vinyl halides, vinyl ethers of alcohols comprising 1 to 10 carbon atoms, aliphatic hydrocarbons having 2 to 8 carbon atoms and one or two double bonds, and mixtures of these monomers, and (b) at least 0.1 wt %, based on the total amount of monomers, of at least one monomer having at least one acid group, and (c) 0.1 to 5 wt %, based on the total amount of monomers, of at least one ethylenically unsaturated compound having at least one functional group selected from keto groups and aldehyde groups; where the aqueous polymer dispersion comprises at least one compound A which has at least two functional groups that are able to enter into a crosslinking reaction with keto groups or with aldehyde groups; where the molar ratio of the groups of the compound A that are reactive with keto groups or with aldehyde groups to the keto and aldehyde groups of the monomer (b) is from 1:10 to 2:1; and where, in the composite film lamination, at least two films are bonded to one another with the laminating adhesive so firmly that the peel strength is 2.5 N/15 mm or more or that the films bonded to one another are partable only with destruction of at least one of the films. The composite films can be used for the packing of foods.

    Aqueous polymer dispersions for composite film lamination
    7.
    发明授权
    Aqueous polymer dispersions for composite film lamination 有权

    公开(公告)号：US10604685B2

    公开(公告)日：2020-03-31

    申请号：US15565433

    申请日：2016-04-13

    Applicant: BASF SE

    Inventor： Matthias Zorn ,  Karl-Heinz Schumacher

    IPC: C09J151/00 ,  B32B27/08 ,  B32B27/12 ,  C09D151/00 ,  B32B7/12 ,  C08F265/06 ,  C08L51/00

    Abstract: Described are aqueous polymer dispersions for composite film lamination, comprising a dispersed polymer and a dissolved polymer, and also a multistage process for preparing them from ethylenically unsaturated, radically polymerizable monomers. In a first stage, a first polymer is prepared by radical emulsion polymerization. In a second stage, an aqueous polymer dispersion is prepared in the presence of the first polymer. The monomers of the first stage comprise monomers with acid groups. The dissolved polymer comprises monomers having oxazoline groups, and also water-soluble monomers. The aqueous polymer dispersions can be used as adhesive for producing composite films.

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