JPS57141023A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57141023A
JPS57141023A JP2449581A JP2449581A JPS57141023A JP S57141023 A JPS57141023 A JP S57141023A JP 2449581 A JP2449581 A JP 2449581A JP 2449581 A JP2449581 A JP 2449581A JP S57141023 A JPS57141023 A JP S57141023A
Authority
JP
Japan
Prior art keywords
binder
coating
epoxy resin
magnetic
recording medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2449581A
Other languages
Japanese (ja)
Inventor
Sadamu Kuze
Masayoshi Kawarai
Seiji Wataya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP2449581A priority Critical patent/JPS57141023A/en
Publication of JPS57141023A publication Critical patent/JPS57141023A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
    • G11B5/7023—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing polyesters, polyethers, silicones, polyvinyl resins, polyacrylresins or epoxy resins

Abstract

PURPOSE:To facilitate the coating work of a coating liquid containing metallic magnetic powder and a binder to improve the electromagnetic conversion characteristic etc., by adding a liquid epoxy resin to the binder containing a vinyl chloride-vinyl acetate copolymer including COOH to suppress thickening and gelling of the coating liquid. CONSTITUTION:In case that a magnetic layer containing metallic magnetic powder including a vinyl chloride-vinyl acetate copolymer contg. COOH as a binder is formed on a supporting material, a magnetic coating material including 1- 50wt% liquid epoxy resin, especially, cycloaliphatic epoxy resin to the total quantity of the binder is used. Thus, thickening and gelling of the coating material are prevented to improve the coating workability, and a high-durability magnetic recording medium superior in electromagnetic conversion characteristic and surface smoothness of the magnetic layer is obtained.
JP2449581A 1981-02-20 1981-02-20 Magnetic recording medium Pending JPS57141023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2449581A JPS57141023A (en) 1981-02-20 1981-02-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2449581A JPS57141023A (en) 1981-02-20 1981-02-20 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57141023A true JPS57141023A (en) 1982-09-01

Family

ID=12139751

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2449581A Pending JPS57141023A (en) 1981-02-20 1981-02-20 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57141023A (en)

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