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    THERMOPLASTIC POLYURETHANE AND ITS PRODUCTION
    1.
    发明专利
    THERMOPLASTIC POLYURETHANE AND ITS PRODUCTION 失效

    公开(公告)号：JPH10158503A

    公开(公告)日：1998-06-16

    申请号：JP32067797

    申请日：1997-11-21

    Applicant: BASF AG

    Inventor： GENZ MANFRED DR ,  PRISSOK FRANK DR ,  HORN PETER DR ,  KRECH RUEDIGER ,  LEHR GERHARD ,  KING HORST DR

    IPC: C08G18/08 ,  C08J11/06 ,  C08L75/04

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject polyurethane by using a means capable of performing a thermoplastic processing without a troublesome chemical treatment by adding a crushed state of crosslinked polyurethane to a reaction product mixture. SOLUTION: A thermoplastic polyurethane is produced by reacting isocyanate with a compound reactive with the isocyanate in the presence or absence of a chain extender, a catalyst and a usual auxiliary and an additive. In the process, crosslinked polyurethane in crushed shape is added to the reaction mixture before, during and/or after the reaction. Preferably, a dimension of the crushed crosslinked polyurethane is within the range of 0.1-25mm and a weight ratio of the crushed polyurethane to the reaction mixture is (0.001:1)-(4:1), and an equivalent ratio of the isocyanate group to total or the reactive hydrogen atom is (0.9:1)-(1.5:1).

    6.
    发明专利
    未知

    公开(公告)号：DE59510310D1

    公开(公告)日：2002-09-12

    申请号：DE59510310

    申请日：1995-10-14

    Applicant: BASF AG

    Inventor： HORN DR ,  JUNG LUDWIG ,  LARBIG DR ,  LEBKUECHER DR ,  LEHR GERHARD

    IPC: C08G18/50 ,  C08G65/26

    Abstract: The prodn. of polyurethane (PU) foam comprises reacting (a) polyisocyanate(s); with (b) high-mol. wt. polyol(s) with at least two reactive H atoms, comprising (B1) polyoxyalkylene-polyol(s) with an OH no. of 30-500, obtd. by alkoxylating N,N'-bis(3-aminopropyl)-ethylenediamine, tripropylene-tetramine and/or tetrapropylene-pentamine with alkene oxide(s); and opt. (c) low-mol wt. chain extenders and/or crosslinkers; in the presence of (d) blowing agents. Also claimed are polyols (b1) obtd. as above.

    Multilayer polyurethane film for prodn. of covering layers - comprises at least two layers of thermoplastic polyurethane with different shore hardness
    10.
    发明专利
    Multilayer polyurethane film for prodn. of covering layers - comprises at least two layers of thermoplastic polyurethane with different shore hardness 未知

    公开(公告)号：DE4022741A1

    公开(公告)日：1992-01-23

    申请号：DE4022741

    申请日：1990-07-18

    Applicant: BASF AG

    Inventor： ZEITLER GERHARD DR ,  LEHR GERHARD ,  LAUSBERG DIETRICH DR

    IPC: B32B27/40 ,  C08J5/18

    Abstract: Multilayer polyurethane film (I) is claimed, in which at least 2 of the layers consist of thermoplastic PU (TPU) with different Shore hardness. Pref. (I) is double-layer film with layers of different Shore hardness. At least one layer (1) is TPU with Shore A hardness (SAH) = 60-98 and at least one layer (2) is TPU with Shore D hardness (SDH) = 50-74, pref. based on polyether-polyol and polyester-polyol, respectively, and pref. forming the upper or patterned layer (1) and the lower layer (2). (I) is 0.2-2.5 mm thick, and the separate layers are 01.-2.4 mm thick, opt. the film material can be a thermoplastic moulding material contg. at last 50 wt.% TPU and up to 50 wt.% ABS copolymer, As copolymer, styrene copolymer modified with acrylate rubber, polyester, polycarbonate, polyamide, or a mixt. of at least 2 of these plastics; (I) is produced by coextrusion. USE/ADVANTAGE - (I) is useful for the prodn. of covering layers by thermoforming (claimed). Cost-effective process for the prodn. of (I). The film has good thermal and light stability, and can be backed with PU foam without undesirable interactions, or thermoformed over a wide temp. range, e.g. to produce "mould skins" for automobile dashboards, glove boxes, etc.

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