MAGNETIC RECORDING MEDIUM

PURPOSE: To suppress the wear of a head by forming a magnetic layer contg. a fine powdery org. hydrophobic pigment insoluble in a solvent used and having >90 deg.C m.p. by 0.1-8wt.% of the amt. of a magnetic material. CONSTITUTION: A magnetic dispersion liq. contg. a fine powdery org. hydrophobic...

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Bibliographische Detailangaben
Hauptverfasser:	BUERUNAA RENTSU, NORUBERUTO SHIYUNAIDAA, RAINHARUTO SHIYUTORANSUKII, HERUMAN RORAA, AUGUSUTO REENAA, ARUBERUTO KOORU, BUERUNAA BARUTSU
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PURPOSE: To suppress the wear of a head by forming a magnetic layer contg. a fine powdery org. hydrophobic pigment insoluble in a solvent used and having >90 deg.C m.p. by 0.1-8wt.% of the amt. of a magnetic material. CONSTITUTION: A magnetic dispersion liq. contg. a fine powdery org. hydrophobic pigment, PE or PP having a mol.wt. of 500-7,000 as a binder and an anisotropic magnetic material in an org. solvent is prepd. The pigment is insoluble in the solvent and has >=90 deg.C m.p. and a fine powdery spherical pigment having 90 deg.C m.p. is advantageously used. The pigment is contained by 0.1-8wt.% of the amt. of the magnetic material. A nonmagnetic substrate is coated with the dispersion liq., the anistropic magnetic material is oriented in a magnetic field and the resultant magnetic layer is solidified. The objective medium producing no harmful effect on mechanical properties is obtd. without deteriorating magnetic properties.