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    11.
    发明专利
    未知

    公开(公告)号：DE59607438D1

    公开(公告)日：2001-09-13

    申请号：DE59607438

    申请日：1996-04-26

    Applicant: EMTEC MAGNETICS GMBH

    Inventor： BRODT GREGOR ,  SCHELBLE JOSEF ,  LEHNER AUGUST ,  WEINGART FRANZ ,  KOHL ALBERT ,  KRESS RIA ,  SCHNEIDER NORBERT

    IPC: C08G18/62 ,  C08G18/10 ,  C08G18/65 ,  C08G18/83 ,  C09D5/23 ,  C09D17/00 ,  G11B5/702

    Abstract: chemical industry. SUBSTANCE: described is polymeric binder for pigment-containing agents or bodies for applying coatings. Said binder is product of reaction of polymer based on at least one complex alkyl ester of alpha j beta-saturated carboxylic acid having 1-25 carbon atoms in alkyl moiety which comprises at least one starter and/or regulator which allow for presence of one end hydroxy group on one of ends of most polymeric chains with at least one multiatomic nonaromatic isocyanate at isocyanate group to hydroxy group molar ratio of (1.2- 3.9):1, reaction of the resulting isocyanate group containing product with at least one compound containing groups reactive with respect to isocyanates at molar ratio of reactive groups to free isocyanate groups present in product of (2-7):1 followed by reaction of the resulting product with at least one compound which reacts with free reactive groups and which introduces acid groups into product or with at least one compound containing groups which are active with respect to isocyanates said compound introduces acid groups into product containing isocyanate groups. The resulting binders and bodies for coatings have improved stability. EFFECT: improved properties of the polymeric binder. 7 cl, 8 ex

    Magnetic recording medium based on a polyurethane prepolymer containing hydroxyland amino groups
    14.
    发明专利
    Magnetic recording medium based on a polyurethane prepolymer containing hydroxyland amino groups 未知

    公开(公告)号：AU2273699A

    公开(公告)日：1999-07-19

    申请号：AU2273699

    申请日：1998-12-16

    Applicant: EMTEC MAGNETICS GMBH

    Inventor： LEHNER AUGUST ,  KOHL ALBERT ,  KRESS RIA ,  WUNSCH THOMAS ,  WEINGART FRANZ

    IPC: C09D5/23 ,  C09D175/04 ,  G11B5/702

    Abstract: The present invention relates to a magnetic recording medium, comprising a non-magnetic support and at least one magnetic coating applied thereto, whereby said coating contains at least one finely distributed magnetic material dispersed in a binding agent. Said binding agent contains at least one polyurethane resin (PV, which can be obtained by cross-linking at least one polyisocyanate (A) with at least one polyurethane prepolymer (B) which is free of isocyanate groups and contains at least 3 active hydrogen atoms. The invention is characterised in that the polyurethane prepolymer (B) has at least two hydroxyl groups and at least one primary and/or secondary amino group. The invention also relates to a method for producing a magnetic recording medium, polyurethane prepolymers B) which are free of isocyanate and a method for the production and use thereof.

    Continuous process for recovering raw materials from coated foils, device for carrying out this process and foil materials recovered thereby
    15.
    发明专利
    Continuous process for recovering raw materials from coated foils, device for carrying out this process and foil materials recovered thereby 未知

    公开(公告)号：AU6928896A

    公开(公告)日：1997-03-19

    申请号：AU6928896

    申请日：1996-08-26

    Applicant: EMTEC MAGNETICS GMBH

    Inventor： STEPHAN OSKAR ,  WEINGART FRANZ ,  BURKHARDT UWE ,  THIELE HEINO ,  SCHWARZ LOTHAR ,  MULLER NORBERT ,  EICHER JOCHEN

    IPC: B29B17/02 ,  C08J11/08

    Abstract: Continuous recovery of raw materials from coated films and apparatus for this purpose and film material recovered therewith. Large amounts of coated films can be fed to a continuous recycling process in which any pigments present in the coating and the substrate material are recovered. The treatment is carried out at room temperature in an alkaline medium consisting of soft soap, organic solvent and/or water, with or without the use of a catalyst. The solvent is recycled. After the first treatment stage, the film shreds can be treated in a second stage with a solvent/water mixture similarly to the first stage, and thorough final washing in a water or solvent circulation is effected in a third stage. The recovered film shreds are dried, pressed, milled and brought to the desired shape in a plastics agglomerator, and the recovered pigments are dried under reduced pressure (FIG. 1). The process and apparatus can be used with advantage for any type of substrate or printed media, for example for magnetic substrates, photographic substrates, printing plates, pigment-free substrates.

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