中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

155 records (took 0.021 seconds)

    5.
    发明专利
    未知

    公开(公告)号：BR0302052A

    公开(公告)日：2004-09-08

    申请号：BR0302052

    申请日：2003-06-24

    Applicant: BAYER AG

    Inventor： RASSHOFER WERNER

    IPC: B29C44/02 ,  B29B17/00 ,  B29C39/02 ,  B29C67/20 ,  B29K75/00 ,  B29K105/04 ,  B29K105/26 ,  C08J9/33 ,  B29C44/04 ,  C08J11/04

    Abstract: A liquid binder is added and uniformly distributed in production residues from polyurethane rigid foam production and/or post-consumer components based the foam. The obtained mixture is added to a tool, hardened by introducing steam, and removed. The polyurethane rigid foam has an open-cell foam density of 5-50 kg/m3, a compressive strength of 0.05-0.2 MPa, and an open-cell content of more than 50%. A liquid binder containing reactive isocyanate groups and based on a mixture and/or reaction product of aromatic and/or aliphatic polyisocyanates, and polyols, is added and uniformly distributed in production residues from polyurethane rigid foam production and/or post-consumer components based on polyurethane rigid foam. The obtained mixture is added to a tool. Steam, optionally under pressure, is introduced into the tool for the production of molded component, block or cylinder. The product is then hardened and removed from the tool. The polyurethane rigid foam has an open-cell foam density of 5-50 kg/m3 as measured by DIN 53 420, a compressive strength of 0.05-0.2 MPa as measured by DIN 53 421, and an open-cell content of more than 50% as measured by DIN ISO 4590-86.

    Device and process for producing plastic components, especially polyurethane mouldings
    6.
    发明专利
    Device and process for producing plastic components, especially polyurethane mouldings 未知

    公开(公告)号：AU719226B2

    公开(公告)日：2000-05-04

    申请号：AU1924197

    申请日：1997-02-27

    Applicant: BAYER AG

    Inventor： RASSHOFER WERNER ,  MULLER HENRY ,  SYMANNEK ACHIM

    IPC: B29C33/38 ,  B29C44/00 ,  B29K75/00 ,  B29K105/04 ,  C08G18/66 ,  C22C38/00 ,  C22C38/22 ,  C22C38/24 ,  C22C38/30 ,  C22C38/52

    Abstract: PCT No. PCT/EP97/00952 Sec. 371 Date Sep. 4, 1998 Sec. 102(e) Date Sep. 4, 1998 PCT Filed Feb. 27, 1997 PCT Pub. No. WO97/34021 PCT Pub. Date Sep. 18, 1997The present invention relates to a process for preparing solid, microcellular or expanded plastic molded items, characterized in that said molded items are produced in molds in which the internal surfaces consist of steel with the percentage composition: a) Fe: having a wt % greater than 0 wt % and less than 100 wt %; b) at least one element selected from the group consisting of W, Mo, or V, wherein if W is selected, W is present from a range greater than 0 wt % to 40 wt %; wherein if Mo is selected, Mo is present from a range greater than 0 wt % to 12 wt %; and if V is selected, V is present from a range greater than 0 wt % to 5 wt %; c) at least one element selected from the group consisting of Cr, Al, wherein if Cr is selected, Cr is present in a concentration of greater than 0 wt % to 15 wt %; and if Al is selected, Al is present in a concentration of greater than 0 wt % to 15 wt %; d) optionally, carbon at a concentration ranging from 0.1 to 1.5 wt %; e) optionally, cobalt at a concentration ranging from 0.1 to 10 wt %; and f) optionally, nitrogen in a nitriding layer at a concentration ranging from greater than 0 wt % to 10 wt %.

    7.
    发明专利
    未知

    公开(公告)号：DE19780203D2

    公开(公告)日：1999-07-15

    申请号：DE19780203

    申请日：1997-02-27

    Applicant: BAYER AG

    Inventor： RASSHOFER WERNER ,  MUELLER HENRY ,  SYMANNEK ACHIM

    IPC: B29C33/38 ,  B29C44/00 ,  B29K75/00 ,  B29K105/04 ,  C08G18/66 ,  C22C38/00 ,  C22C38/22 ,  C22C38/24 ,  C22C38/30 ,  C22C38/52 ,  C22C38/12

    Abstract: PCT No. PCT/EP97/00952 Sec. 371 Date Sep. 4, 1998 Sec. 102(e) Date Sep. 4, 1998 PCT Filed Feb. 27, 1997 PCT Pub. No. WO97/34021 PCT Pub. Date Sep. 18, 1997The present invention relates to a process for preparing solid, microcellular or expanded plastic molded items, characterized in that said molded items are produced in molds in which the internal surfaces consist of steel with the percentage composition: a) Fe: having a wt % greater than 0 wt % and less than 100 wt %; b) at least one element selected from the group consisting of W, Mo, or V, wherein if W is selected, W is present from a range greater than 0 wt % to 40 wt %; wherein if Mo is selected, Mo is present from a range greater than 0 wt % to 12 wt %; and if V is selected, V is present from a range greater than 0 wt % to 5 wt %; c) at least one element selected from the group consisting of Cr, Al, wherein if Cr is selected, Cr is present in a concentration of greater than 0 wt % to 15 wt %; and if Al is selected, Al is present in a concentration of greater than 0 wt % to 15 wt %; d) optionally, carbon at a concentration ranging from 0.1 to 1.5 wt %; e) optionally, cobalt at a concentration ranging from 0.1 to 10 wt %; and f) optionally, nitrogen in a nitriding layer at a concentration ranging from greater than 0 wt % to 10 wt %.

    8.
    发明专利
    未知

    公开(公告)号：BR9605418A

    公开(公告)日：1998-08-04

    申请号：BR9605418

    申请日：1996-11-04

    Applicant: BAYER AG ,  BAYERISCHE MOTOREN WERKE AG

    Inventor： LAMMECK ADOLF ,  RASSHOFER WERNER ,  GLASDER ANDREAS

    IPC: B32B5/28 ,  B32B9/02 ,  B32B27/40 ,  C08J5/04 ,  C08J9/34

    Abstract: Composite bodies with a polyurethane (PU) core and at least one outer layer of plastic material reinforced with natural fibre, in which the core is made by reacting (a) polyisocyanates with (b) polyols with an OH number of 100-500 mg KOH/g, a water content of 0-5 wt% and a viscosity of more than 2000 mPa.s (20 degrees C), obtained by chemical cleavage of waste PU and/or polyurea materials. Also claimed is a process for the production of these composites, by applying outer layer(s) as above so as to form a sandwich structure with a core made by reacting (a) with recycled polyols (b) as above, opt. with other substances and additives etc.

    ARTICULOS COMPUESTOS DE POLIURETANO PRODUCIDOS A PARTIR DE POLIOLES RECICLADOS Y PROCESO PARA SU PRODUCCION.
    9.
    发明专利
    ARTICULOS COMPUESTOS DE POLIURETANO PRODUCIDOS A PARTIR DE POLIOLES RECICLADOS Y PROCESO PARA SU PRODUCCION. 未知

    公开(公告)号：MX9605286A

    公开(公告)日：1998-06-28

    申请号：MX9605286

    申请日：1996-10-31

    Applicant: BAYER AG ,  BAYERISCHE MOTOREN WERKE AG ,  LLSCHAFT

    Inventor： RASSHOFER WERNER ,  LAMMECK ADOLF ,  GLASDER ANDREAS

    IPC: B32B5/28 ,  B32B9/02 ,  B32B27/40 ,  B32B25/10

    Abstract: La presente invencion describe compuestos (elementos tipo emparedado) que tienen un nucleo de poliuretano y al menos una capa de revestimiento e un material plástico reforzado con fibra, los cuales se producen a partir de (a) un nucleo de poliuretano que es el producto de reaccion de un poliisocianato con una composicion de poliol obtenida por descomposicion química de desechos de poliuretano y/o poliurea, y que tiene un numero de OH en el intervalo desde 100 a 500 mg de KOH/g, un contenido de agua desde 0 a 5 % por peso, y una viscosidad mayor de 2,000 centipoises (2,000 mPa.s) (20 degree C) y (b) al menos una capa de revestimiento de un material plástico reforzado con fibras naturales. Estos compuestos sonutiles en la construccion de vehículos de motor, construccion de mobiliario, construccion de máquinas y la construccion de aparatos. Estos preferiblemente se usan en la construccion de vehículos de motor, en particular, como piezas moldeadas en el interior del vehículo de motor.

    PROCESS FOR THE THERMOPLASTIC WORKING UP OF POLYURETHANES
    10.
    发明专利
    PROCESS FOR THE THERMOPLASTIC WORKING UP OF POLYURETHANES 未知

    公开(公告)号：CA2119001A1

    公开(公告)日：1994-09-19

    申请号：CA2119001

    申请日：1994-03-14

    Applicant: BAYER AG

    Inventor： NEFZGER HARTMUT ,  QUIRING BERND ,  MECKEL WALTER ,  RASSHOFER WERNER ,  WAGNER JOACHIM

    IPC: B29B13/02 ,  B29C45/00 ,  B29K75/00 ,  C08G18/08 ,  C08G18/10 ,  C08G18/65 ,  C08G18/76 ,  C08G18/82 ,  C08J5/00 ,  C08J11/06 ,  C08J11/12

    Abstract: A PROCESS FOR THE THERMOPLASTIC PROCESSING OF POLYURETHANES The present invention relates to a process for the thermoplastic processing of polyurethanes via the melt phase wherein said polyurethanes have a melt viscosity which is substantially independent of the molar ratio of isocyanate groups to active hydrogen containing groups. These polyurethanes comprise the reaction product of A) one or more polydiols having an average molecular weight of from 550 to 10,000, B) one or more chain extending agents having a molecular weight below 500, an average functionality of about 2, and containing amino and/or hydroxyl groups as functional groups, and C) one or more diisocyanates wherein said components are present in quantities such that the molar ratio of the isocyanate groups to the Zerewitinoff-active hydrogen containing groups is at least 1.10:1, and the polyurethanes are subjected to a temperature treatment prior to thermoplastic processing.

Patent Agency Ranking