MAGNETIC RECORDING MEDIUM

PURPOSE:To obtain a magnetic recording medium having an excellent characteristic with good productivity by using a binder for magnetic powder formed by combining 3 kinds of components consisting of a specific vinyl chloride/vinyl acetate copolymer or cellulose nitrate, a specific urethane acrylate a...

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Bibliographische Detailangaben
Hauptverfasser:	OKITA TSUTOMU, MUKOUDA YOSHIHITO, TSUJI NOBUO
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS DYES FILLING PASTES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS 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 TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a magnetic recording medium having an excellent characteristic with good productivity by using a binder for magnetic powder formed by combining 3 kinds of components consisting of a specific vinyl chloride/vinyl acetate copolymer or cellulose nitrate, a specific urethane acrylate and an acrylate low molecular compd., and irradiating electron rays thereto. CONSTITUTION:A binder contg. in combination >=1 kind among the respective groups consisting of a vinyl chloride/vinyl acetate resin or cellulose nitrate contg. 5X10-1.7X10 equiv. -CO2H for each 1g of the polymer (group A), an urethane acrylate contg. >=2 (meth)acryloyl groups in a molecule in which, >=50mol% of the polyhydric alcohol component constituting the polyester polyol is an alkyl substd. aliphat. dihydric alcohol, alicyclic dihydric alcohol, etc. or >=50mol% of the polybasic acid component of the polyester polyol is an alicyclic or arom. dicarboxylic acid (group B) and a compd. of =2 (meth)acryloyl groups in a molecule (group C) is used in binding magnetic powder. The recording medium having an excellent electromagnetic conversion characteristic, durability, etc. is thus obtd.