JPS56101640A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56101640A
JPS56101640A JP472580A JP472580A JPS56101640A JP S56101640 A JPS56101640 A JP S56101640A JP 472580 A JP472580 A JP 472580A JP 472580 A JP472580 A JP 472580A JP S56101640 A JPS56101640 A JP S56101640A
Authority
JP
Japan
Prior art keywords
magnetic layer
recording medium
magnetic recording
molecular weight
magnetic
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
JP472580A
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 JP472580A priority Critical patent/JPS56101640A/en
Publication of JPS56101640A publication Critical patent/JPS56101640A/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 the dispersibility, wear resistance and heat resistance of magnetic powder, by forming a magnetic layer by using a binder which contains a specific ternary copolymer, polyether plasticizer and trifunctional low-moleuclar weight isocyanate. CONSTITUTION:The magnetic recording medium is formed which has a magnetic layer using a binder consisting of a copolymer of 200-600 polymerization degree made of 70-80wt% vinyl chloride, 1-25wt% vinyl propionate, and 5-20wt% vinyl alcohol, and a polyether plasticizer, such as polyoxypropyleneglycol monoether of 200-10,000 molecular weight, and further a magnetic layer with additional trifuctional low-molecular weight polyisocyanate.
JP472580A 1980-01-19 1980-01-19 Magnetic recording medium Pending JPS56101640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP472580A JPS56101640A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP472580A JPS56101640A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56101640A true JPS56101640A (en) 1981-08-14

Family

ID=11591861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP472580A Pending JPS56101640A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56101640A (en)

Similar Documents

Publication Publication Date Title
JPS5792422A (en) Magnetic recording medium
JPS56101640A (en) Magnetic recording medium
JPS5774829A (en) Magnetic recording medium
JPS56101631A (en) Magnetic recording medium
JPS57102967A (en) Heat-insulating coat composition
JPS56101630A (en) Magnetic recording medium
JPS56101641A (en) Magnetic recording medium
JPS56101637A (en) Magnetic recording medium
JPS56101632A (en) Magnetic recording medium
JPS56101633A (en) Magnetic recording medium
JPS56101642A (en) Magnetic recording medium
JPS5473005A (en) Magnetic recording medium
JPS57152523A (en) Magnetic recording medium
JPS56101636A (en) Magnetic recording medium
JPS56101628A (en) Magnetic recording medium
JPS57152524A (en) Magnetic recording medium
JPS57152527A (en) Magnetic recording medium
JPS56101635A (en) Magnetic recording medium
JPS57152529A (en) Magnetic recording medium
JPS56119921A (en) Magnetic recording medium
JPS56101626A (en) Magnetic recording medium
JPS56119928A (en) Magnetic recording medium
JPS56119927A (en) Magnetic recording medium
JPS56101629A (en) Magnetic recording medium
JPS56101627A (en) Magnetic recording medium