Basf Aktiengesellschaft

Emtec Magnetics Gmbh

Basf Magnetics Gmbh

Imation Corporation

Basf Magnetic Gmbh

Basi Magnetics Gmbh

Emtech Magnetics Gmbh

Solvicore Gmbh & Co Kg

Albert Kohl

August Lehner

Werner Balz

Werner Lenz

Norbert Schneider

Ria Kress

Gregor Brodt

Hermann Roller

Michael Bobrich

Peter Heilmann

Rudolf Suettinger

Friedrich Sommermann

Helmut Jakusch

Uwe Keppeler

Thomas Wunsch

Helmut Kopke

Milena Melzer

Franz Weingart

Ronald J Veitch

Michael Hitzfeld

Johannes Sandrock

Benedikt Raether

Heinrich Hartmann

Peter Rudolf

Eberhard Koester

Stephan Bauer

Werner Loch

Helmut Auweter

Werner Grau

Guenther Schulz

Guenter Heil

Reinhold Baur

Rudolf Bachmann

Ludwig Kreitner

Uwe Burkhardt

Ulrike Hees

Hermann Dikow

Peter Engelhardt

Josef Schelble

Ernst Ricker

Gunnar Schornick

Manfred Ohlinger

Richard L Bradshaw

Wolfgang Reich

Peter Schuhmacher

Jenoe Kovacs

Gregor Ley

Herbert Spoor

Peter Blaschka

Gerhard Maier

Peter Richter

Volker Koch

Hermann Graf

Harald Jachow

Volker Richter

Christa Hackl

Claudia Sierakowski

Wolfgang Best

Milan Velic

Rudi Lehnert

Andreas Ilmer

Ursula Klein

Reinhard Baumann

Werner Latzel

Karl Mahler

Wolfgang Goede

Guenter Bettinger

Erich Hoffmann

Stefan Mueller

Roller Hermann

Andrea Sturm

Horst Platz

Juergen Klausmann

Jochen Rudolph

Alfred Lindner

Karl Heinz Romer

Werner H&uuml;bner

Eerhard Koester

Wulf Muenzer

Rudiger Krech

Hans-Ganther Bohrmann

Jurgen Richter

Stefan Müller

Karl-Heinz Romer

Hartmut Heene

Hans-Guenter Bohrman

Stefan M&uuml;ller

Andreas Willert

Frank Siegel

Multilayer magnetic recording medium which is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties and good surface smoothness and can absorb a large amount of lubricant in the lower layer and has at least one upper magnetic recording layer less than 0.5 &#x3bc;m thick and at least one lower layer which contains a magnetically soft pigment.

Magnetic recording medium

A polyurethane having at least one anionic anchor group L, the anchor group L being covalently bonded to a polyether segment having at least one nitrogen atom in the polyurethane.

Polyurethane method for the production thereof and binding agent produced therefrom

Multilayer magnetic recording medium is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties in the entire recording wavelength range and good mechanical properties and possesses a flat frequency response and which has at least one upper magnetic recording layer less than 0.5 &mgr;m thick and at least one lower layer which contains a magnetically soft pigment.

The present invention relates to novel cholesteric layered materials having the layer sequence A /B/A , where A and A are identical or different and each comprise at least one cholesteric layer, and B is at least one interlayer separating the layers A and A from one another, wherein layer B is an adhesive layer; cholesteric multilayered pigments which can be produced therefrom; a process for their production, and their use.

Cholesteric layered material, and the production thereof

Filler-containing binder composition, its preparation and its use

Described are tape-type magnetic recording media (I) including a non-magnetic substrate (III), at least one film applied to the substrate and, in at least one of these films, an inorganic acicular pigment (II) suitable for use as a supporting pigment, the ratio of the mean length to the mean diameter of the pigment (II) being at least 3 and the mean modulus of elasticity of the films being not less than 15 GPa in the longitudinal direction of the tape-type recording medium (I).

Magnetic recording media

The thermoplastic, isocyanate-free polyurethane which contains acidic groups, is soluble in tetrahydrofuran, has a molecular weight of from 15,000 to 70,000 and is composed of

EMTEC magnetics GmbH

Media I suitable for the thermal transfer of a layer contain

Media suitable for the thermal transfer of layers

Hydroxyl-containing polyurethanes I are composed essentially of

Polyurethanes

Magnetic recording media contain a nonmagnetic substrate and a magnetizable layer, the magnetizable layer containing ferromagnetic pigments and a system of polymeric materials, wherein the system of polymeric materials contains

Preparation of materials (I) having an average molecular weight from 4000 to 30,000, obtainable by reacting

Materials suitable as crosslinkable binder components

The heat sealing film and a magnetic transfer strip contain an adhesive layer comprising thermoplastic, immiscible binder components. One component is spherical, amorphous and embedded in finely distributed form in a homogeneous layer of the other, highly crystalline components in such a way that the spherical component protrudes hemispherically from the layer. The spherical binder is a glassy solid up to at least 60.degree. C. and above 80.degree. C. is plastically deformable. The hemispheres protruding from the adhesive layer produce a uniform, fine roughness of the surface. Both heat sealing film and magnetic transfer strip are nonblocking up to at least 60.degree. C. and heat-sealable at temperatures greater than 80.degree. C. The adhesive layer imparts to a magnetic recording medium a uniform thickness of the adhesive joint and a permanent, temperature-resistant adhesive force.

Heat sealing film

A polymeric material I is obtainable by reacting

Polymeric materials suitable as dispersing resins

Growing community of inventors

Laumersheim, Germany

Albert Kohl