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    PHOTOCURABLE COMPOSITION FOR USE IN 3D PRINTING
    11.
    发明申请
    PHOTOCURABLE COMPOSITION FOR USE IN 3D PRINTING 有权

    公开(公告)号：US20220033678A1

    公开(公告)日：2022-02-03

    申请号：US17276713

    申请日：2019-09-20

    Applicant: BASF SE

    Inventor： Andre Fuchs ,  Claudia Gisela Cordes ,  Hendrik Wagner

    IPC: C09D175/16 ,  C08G18/12 ,  C08G18/76 ,  C08G18/73 ,  C08G18/75 ,  C08G18/42 ,  C08G18/32 ,  C08G18/66 ,  C08G18/67 ,  B33Y70/00

    Abstract: Described herein are photocurable compositions,
    (A) a polyester urethane acrylate, or methacrylate (A),
    (B) an acrylamide, or methacrylamide component (B), and
    (C) a photoinitiator (C), where the polyester urethane acrylate, or methacrylate (A) is obtained by reacting (A1) a hydroxyalkylacrylate, or hydroxyalkylmethacrylate, (A2) an aliphatic diisocyanate, an aliphatic polyisocyanate, a cycloaliphatic diisocyanate, a cycloaliphatic polyisocyanate, an aromatic diisocyanate, or an aromatic polyisocyanate, or mixtures thereof, (A3) a polyester polyol, and (A4) optionally a second polyol.
    The compositions, from which cured three-dimensional shaped articles having high toughness, high E modulus and impact strength can be made, are particularly suitable for the production of three-dimensional articles by stereolithography.

    Reactive thermoplastic polyurethane based on blocked isocyanates
    12.
    发明授权
    Reactive thermoplastic polyurethane based on blocked isocyanates 有权

    公开(公告)号：US11214649B2

    公开(公告)日：2022-01-04

    申请号：US16482951

    申请日：2018-02-16

    Applicant: BASF SE

    Inventor： Rajan Hollmann ,  Sebastian Richter ,  Martin Hufnagel ,  Hendrik Wagner

    IPC: B33Y70/00 ,  C08G18/80 ,  C08G18/12 ,  C08G18/28 ,  C08G18/32 ,  C08G18/48 ,  C08G18/72 ,  C08G18/76

    Abstract: A method for producing a shaped body, containing: producing the shaped body from a composition by a powder-based layer construction process, wherein the composition contains a thermoplastic polyurethane, obtained by reacting a polyisocyanate composition and a polyol composition, the thermoplastic polyurethane is solid at least in a temperature region below 50° C. and has end groups selected from the group consisting of first end groups and second end groups, wherein the first end groups are optionally eliminated at a first temperature, and the second end groups are optionally eliminated at a second temperature, to form reactive groups on the thermoplastic polyurethane that optionally enter into a reaction with functional groups of the thermoplastic polyurethane or functional groups of a further component of the composition, and wherein the first temperature and the second temperature are each greater than or equal to 60° C.

    PROCESS FOR PRODUCING POLYURETHANE-POLYISOCYANURATE ELASTOMERS, SEALING MATERIALS AND ADHESIVES HAVING A LONG POT LIFE
    16.
    发明申请
    PROCESS FOR PRODUCING POLYURETHANE-POLYISOCYANURATE ELASTOMERS, SEALING MATERIALS AND ADHESIVES HAVING A LONG POT LIFE 有权

    公开(公告)号：US20220153908A1

    公开(公告)日：2022-05-19

    申请号：US17442311

    申请日：2020-03-25

    Applicant: BASF SE

    Inventor： Julia Liese ,  Andre Kamm ,  Hendrik Wagner

    IPC: C08G18/10 ,  C08G18/22 ,  C08G18/76 ,  C08G18/48 ,  C08G18/42 ,  C09K3/10

    Abstract: Described herein is a process for preparing a polyurethane elastomer including the steps of (A) preparing an isocyanate prepolymer (a), where the isocyanate prepolymer has an isocyanate content in the range of ≥1 wt.-% to ≤9 wt.-%, and (B) preparing a reaction mixture by mixing at least one epoxy compound (b) with the isocyanate prepolymer (a) in presence of at least one catalyst (c), and where the amount of the alkali metal or alkaline earth metal salt is 0.00001 to 0.1 mol per kg of the total weight of the isocyanate prepolymer (a), the epoxy compound (b) and the catalyst (c), and heating the mixture to at least 80° C. to obtain the polyurethane elastomer. Also described herein are a polyurethane elastomer obtained by process and a method of using the polyurethane elastomer as part of a roller or as a sealant.

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