JPS56101641A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56101641A
JPS56101641A JP472680A JP472680A JPS56101641A JP S56101641 A JPS56101641 A JP S56101641A JP 472680 A JP472680 A JP 472680A JP 472680 A JP472680 A JP 472680A JP S56101641 A JPS56101641 A JP S56101641A
Authority
JP
Japan
Prior art keywords
molecular weight
copolymer
recording medium
magnetic recording
acrylonitrile
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
JP472680A
Other languages
Japanese (ja)
Inventor
Takezo Shimizu
Kosaburo Sato
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 JP472680A priority Critical patent/JPS56101641A/en
Publication of JPS56101641A publication Critical patent/JPS56101641A/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
    • G11B5/7021—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 a polyurethane or a polyisocyanate
    • G11B5/7022—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 a polyurethane or a polyisocyanate containing mixtures of polyurethanes or polyisocyanates with other polymers

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)

Abstract

PURPOSE:To improve the dispersibility, wear resistance and heat resistance of magnetic powder, by using a binder consisting of a specific ternary copolymer, acrylonitrile-butadiene copolymer and trifunctional low-molecular weight isocyanate. CONSTITUTION:A binder is composed of a copolymer of 200-600 polymerization degree consisting of 70-80wt% vinyl chloride, 1-25wt% vinyl propionate and 5-20wt% vinyl alcohol, a mixture of acrylonitrile-butadiene copolymer of >= and <10,000 molecular weight, and trifunctional low-molecular weight isocyanate.
JP472680A 1980-01-19 1980-01-19 Magnetic recording medium Pending JPS56101641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP472680A JPS56101641A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP472680A JPS56101641A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56101641A true JPS56101641A (en) 1981-08-14

Family

ID=11591892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP472680A Pending JPS56101641A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56101641A (en)

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