JPS56101648A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56101648A
JPS56101648A JP516280A JP516280A JPS56101648A JP S56101648 A JPS56101648 A JP S56101648A JP 516280 A JP516280 A JP 516280A JP 516280 A JP516280 A JP 516280A JP S56101648 A JPS56101648 A JP S56101648A
Authority
JP
Japan
Prior art keywords
molecular
low
vinyl
improved
components
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
JP516280A
Other languages
Japanese (ja)
Inventor
Osamu Saito
Fumio Togawa
Takezo Shimizu
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 JP516280A priority Critical patent/JPS56101648A/en
Publication of JPS56101648A publication Critical patent/JPS56101648A/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

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

Abstract

PURPOSE:To improve electromagnetic conversion characteristics, durability and dispersibility, by permitting magnetic powder to contain as binder components a vinyl chloride-vinyl acetate copolymer containing a specific amount of vinyl alcohol unit, low-molecular-weight polyol and low-molecular weight polyisocyanate. CONSTITUTION:Mangetic powder contains as binder components at least three kind of components-a vinyl chloride-vinyl acetate copolymer, such as a ternary cpolymer consisting of vinyl chloride, vinyl acetate and vinyl alcohol as polymerizing unit components, containing a >=10wt% vinyl alcohol unit, low-molecular-weight polyol of, for example, <=10,000 molecular weight having hydroxyl group at both terminals of principal chain, and low-molecular-weight polyisocyanate. Consequently, the strength of the magnetic layer is improved and while the wear resistance, thermal resistance and solvent resistance are improved, electromagnetic conversion characteristics such as the output and SN ratio are also improved.
JP516280A 1980-01-18 1980-01-18 Magnetic recording medium Pending JPS56101648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP516280A JPS56101648A (en) 1980-01-18 1980-01-18 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP516280A JPS56101648A (en) 1980-01-18 1980-01-18 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56101648A true JPS56101648A (en) 1981-08-14

Family

ID=11603544

Family Applications (1)

Application Number Title Priority Date Filing Date
JP516280A Pending JPS56101648A (en) 1980-01-18 1980-01-18 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56101648A (en)

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