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    Multilayer polyurethane film for prodn. of covering layers - comprises at least two layers of thermoplastic polyurethane with different shore hardness
    35.
    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.

    37.
    发明专利
    未知

    公开(公告)号：DE4005818A1

    公开(公告)日：1991-08-29

    申请号：DE4005818

    申请日：1990-02-23

    Applicant: BASF AG

    Inventor： LAUSBERG DIETRICH DR ,  MUEHLBACH KLAUS DR ,  BLUMENSTEIN UWE DR ,  FAEHNDRICH KNUD

    IPC: C08L25/00 ,  C08L51/00 ,  C08L51/04 ,  C08L51/06 ,  C08L75/00 ,  C08L25/16 ,  C08L75/04 ,  C08L75/06

    Abstract: The invention relates to thermoplastic moulding compositions of improved green strength and low-temperature impact strength based on a TPU copolymer mixture and containing, based on 100 parts by weight, A) from 20 to 90 parts by weight of at least one thermoplastic polyurethane, B) from 1 to 40 parts by weight of at least one rubber-elastic graft copolymer built up from B1) a graft base comprising a rubber-elastic polymer having a glass transition temperature of below -20 DEG C based on butadiene or C1-C10-acrylates, and optionally a crosslinking agent, and B2) a graft shell prepared by one-step or multistep copolymerisation of styrene, alpha -methylstyrene, acrylonitrile, methacrylonitrile and methyl methacrylate or mixtures of at least two of said monomers, C) from 5 to 75 parts by weight of at least one copolymer of C1) from 55 to 90% by weight of alpha -methylstyrene and C2) from 10 to 45% by weight of acrylonitrile or methacrylonitrile or mixtures thereof, D) from 0.1 to 5 parts by weight of at least one copolymer of D1) from 60 to 99% by weight of styrene and D2) from 1 to 40% by weight of at least one olefinically unsaturated monomer containing at least one carboxyl, anhydride, tert-butyl ester, hydroxyl or amino group, and E) from 0 to 60 parts by weight of at least one reinforcing filler. The moulding compositions can be prepared by melting together the starting components and are preferably used for the production of injection mouldings.

    Thermoplastic moulding compositions based on polyesters and polyphenylene ethers
    40.
    发明专利
    Thermoplastic moulding compositions based on polyesters and polyphenylene ethers 未知

    公开(公告)号：DE3834085A1

    公开(公告)日：1990-04-12

    申请号：DE3834085

    申请日：1988-10-07

    Applicant: BASF AG

    Inventor： TAUBITZ CHRISTOF DR ,  LAUSBERG DIETRICH DR ,  BRANDT HERMANN DR

    IPC: C08L67/00 ,  C08L67/02 ,  C08L71/12

    Abstract: Thermoplastic moulding compositions based on A) polyesters and B) polyphenylene ethers, characterised by a content of C) from 0.1 to 40% by weight, based on the sum of A, B and C, of a copolymer comprising c1) from 40 to 99.9 mol % of a vinylaromatic monomer, c2) from 0.1 to 60 mol % of a compound of the formula (I) wherein R is -OH, alkoxy, aryloxy, aralkoxy or alkylaryloxy having up to 25 carbon atoms or, together with R is -NR -, R is -H or, if R is -H, is alkyl, aryl, aralkyl or alkaryl having up to 25 carbon atoms or chlorine, R is -H or, if R is -H, is alkyl, aryl, aralkyl or alkaryl having up to 25 carbon atoms or chlorine, R is alkoxy, aryloxy, aralkoxy or alkylaryloxy having up to 25 carbon atoms or, together with R , is -NR -, and R is hydrogen or an alkyl, cycloalkyl, aralkyl or aryl group having up to 12 carbon atoms which itself may be substituted by C1-C4-alkyl or -alkoxy groups, and c3) from 0 to 20 mol % of further copolymerisable monomers, and the preparation and use thereof.k

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