Basf Aktiengesellschaft

Basf Magnetics Gmbh

Emtec Magnetics Gmbh

Basf Magnetic Gmbh

Basi Magnetics Gmbh

Werner Lenz

August Lehner

Albert Kohl

Werner Balz

Hermann Roller

Michael Bobrich

Guenter Heil

Rudolf Suettinger

Norbert Schneider

Heinrich Hartmann

Gerhard Hoffmann

Jenoe Kovacs

Uwe Keppeler

Werner Loch

Helmut Kopke

Gregor Brodt

Guenther Schulz

Reinhold Baur

Ludwig Kreitner

Hermann Dikow

Werner Grau

Milena Melzer

Hans Sander

Peter Engelhardt

Peter Rudolf

Gunnar Schornick

Helmut Jakusch

Bernd Bronstert

Helmut Auweter

Peter Heilmann

Ria Kress

Manfred Zuerger

Peter Richter

Heinz-Ulrich Werther

Ronald J Veitch

Rudolf Bachmann

Albrecht Eckell

Mong-Jon Jun

Michael Hitzfeld

Milan Velic

Werner Latzel

Dieter Moeller

Axel Sanner

Herbert Naarmann

Manfred Ohlinger

Helmut Barzynski

Horst Reimann

Herbert Spoor

John Lynch

Herbert Stutz

Dieter Naegele

Ingolf Buethe

Volker Koch

Harald Jachow

Volker Richter

Udo Haardt

Friedrich Sommermann

Friedrich Domas

Hans J Richter

Alfred Pirker

Dieter Stockburger

Peter Nagel

Josef Woellhaf

Rudi Lehnert

Dieter Moller

Dieter Kleuser

Attila Vass

Herbert Hahn

Ursula Klein

Siegfried Raiff

Paul Hecke

Ernst Ricker

Erich Hoffmann

Hans-Gunter Wagner

Guenter Bettinger

Norbert Gilbert

Klaus Spreng

Milan Obradovic

Heinz U Werther

Werner H&uuml;bner

Roller Hermann

Wolfgang Seib

Jochen Rudolph

Edwin Rothfuss

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

A longitudinally oriented magnetic recording medium is described which has advantageous properties for digital recording, ie. a very small pulse width and high output level, and wherein the quotient l.sub.r /(d.multidot.L) (l.sub.r =residual polarization in mT, d=layer thickness in .mu.m, L=mean particle length in nm) is greater than 18 and the pulse width stated as PW.sub.50 is smaller than 500 nm.

Magnetic recording apparatus with magnetic recording medium having high

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

A knife coater for the application of one or more magnetizable dispersions located one on top of the other to a moving flexible substrate by means of a plurality of coater slots which are arranged essentially horizontally and parallel to one another in a multipart block and are fed from reservoirs is described, the outlet orifices of the coater slots being essentially opposite the summit of a concave support surface for the substrate, the substrate transporting the applied layers, the outlet surfaces of the coater block which are opposite the support surface being adapted to the radius of the roll and the inflow gap being larger than the outflow gap.

Apparatus for the production of a magnetic recording medium

In magnetic recording media consisting of a nonmagnetic substrate and at least one magnetizable layer firmly applied thereon and based on magnetic material dispersed in a binder mixture which contains at least one hydroxyl-containing, preferably low molecular weight polyureaurethane and one polyurethaneurea (meth)acrylate, the polyurethaneurea (meth)acrylate is obtained by reacting a poly(meth)acrylate having up to 2 terminal OH groups per mol and a molecular weight of from 200 to 50,000 with a mixture of aliphatic polyisocyanates having an average functionality of from 3.0 to 6.0 NCO groups per mol, consisting of from 0.1 to 10% by weight of a diisocyanate, from 30 to 80% by weight of a triisocyanate and from 20 to 60% by weight of an isocyanate having a functionality of from 4 to 10, with the proviso that from 1.2 to 3.0 NCO groups react per OH group and the remaining NCO groups are converted into substituted terminal urea groups with a polyfunctional amine or with a mixture of different polyfunctional amines.

Magnetic recording medium containing magnetic material dispersed in a

Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer bonded thereon and based on a magnetic material dispersed in at least one polyurethane and one polyurethaneurea (meth)acrylate, the polyurethaneurea (meth)acrylate being obtained by reacting a hydroxyl-containing poly(meth)acrylate with a mixture of di- and polyisocyanates and converting the remaining NCO groups with ammonia or primary or secondary amines into urea groups.

Magnetic recording media are obtained by preparing a dispersion of anisotropic magnetic material and additives in a solution of a polymeric binder in an organic solvent, applying the dispersion as a layer to a nonmagnetizable substrate, then orienting the anisotropic magnetic material in a magnetic field and solidifying the applied magnetic layer, and the magnetic layer contains water-repellent polysilica and, if required, a highly viscous polysiloxane.

Magnetic recording media are obtained by preparing a dispersion of anisotropic magnetic material and conventional additives in a solution of a polymeric binder in an organic solvent, applying the dispersion as a layer to a nonmagnetizable substrate, then orienting the anisotropic magnetic material in a magnetic field and solidifying the applied magnetic layer, the magnetic layer containing finely divided organic, hydrophobic supporting pigments and a highly viscous polysiloxane.

Flexible magnetic recording media consisting essentially of a web-like nonmagnetic substrate, a magnetic layer applied to one main side of the web-like substrate and a backing layer formed on the opposite main side of the substrate from a polymeric binder, at least one filler, at least one auxiliary pigment and a polyolefin having a spherical particle shape.

Magnetic recording medium having an infra-red light transparent balkcoat

In flexible magnetic recording media consisting essentially of a web-like nonmagnetic substrate, the magnetic layer is applied to one main side of the web-like substrate and a backing coating formed on the opposite main side of the substrate from a polymeric binder and nonmagnetic fillers as well as supporting pigments, the backing coating contains a precipitated silica treated on the surface with a phosphate-containing polyurethane.

Flexible magnetic recording media having a backing coating containing a

Magnetic recording media consist of a nonmagnetic substrate and one or more magnetizable layers bonded thereon and based on a polyurethane binder, the binder consisting of not less than 50% by weight of a branched polyurethane elastomer having sulfonate groups and possessing urea groups at the chain ends.

In magnetic recording media consisting of a nonmagnetic substrate and one or more magnetizable layers bonded thereon and based on a polyurethane binder, the binder consists of not less than 50% by weight of an isocyanate-free, branched polyurethane which is soluble in tetrahydrofuran and has sulfonate groups along the polyurethane branches and OH-containing urea groups at the chain ends and a molecular weight of from 4,000 to 30,000.

A component having a virtually rectangular force-displacement characteristic line and comprising an elongated polymer foam block (1) of rectangular cross-section having sides a and b and having a recess (2) of width d and depth c extending along the entire length of the block on one side, said dimensions satisfying certain equations.

Component for absorbing impact energy

Magnetic recording media consisting of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon and is based on a magnetic material which essentially consists of ferromagnetic chromium dioxide and is finely dispersed in a polymer binder and further conventional additives are distinguished by a particular stability to the chemical decomposition due to moisture and oxidizable compounds and hence particular stability to the deterioration in the magnetic properties, as a result of the addition of from 0.1 to 8% by weight, based on the amount of chromium dioxide, of a monomeric, polyunsaturated, organic compound to the magnetic layer.

Magnetic recording medium having a magnetic layer containing chromium

Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon and is based on a polyurethane binder, not less than 50% by weight of the binder consisting of a high molecular weight branched polyurethane elastomer having OH-containing urea groups at the chain ends, and the frictional properties of the binder being improved and its coefficient of friction reduced by incorporation of perfluoro groups.

Magnetic recording media comprising a polyurethane binder resin

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Werner Lenz