JPS57152523A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57152523A
JPS57152523A JP3839681A JP3839681A JPS57152523A JP S57152523 A JPS57152523 A JP S57152523A JP 3839681 A JP3839681 A JP 3839681A JP 3839681 A JP3839681 A JP 3839681A JP S57152523 A JPS57152523 A JP S57152523A
Authority
JP
Japan
Prior art keywords
magnetic layer
binder components
recording medium
magnetic recording
acetate copolymer
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
JP3839681A
Other languages
Japanese (ja)
Inventor
Kosaburo Sato
Shozo Ide
Akira Okazoe
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 JP3839681A priority Critical patent/JPS57152523A/en
Publication of JPS57152523A publication Critical patent/JPS57152523A/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, packing property, etc., of magnetic powder by using a vinyl chloride-vinyl acetate copolymer having groups and a specific polyurethane prepolymer in combination as binder components for a magnetic layer. CONSTITUTION:As binder components for a magnetic layer, a vinyl chloride- vinyl acetate copolymer having epoxy groups and a polyurethane prepolymer having <=10,000 molecular weight are used. The weight ratio of said copolymer to prepolymer is favorably 8:2-4:6. Further, amine and amide such as ethylene diamine and dicyandiamide may be used as binder components to further improve the heat resistance of the magnetic layer.
JP3839681A 1981-03-16 1981-03-16 Magnetic recording medium Pending JPS57152523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3839681A JPS57152523A (en) 1981-03-16 1981-03-16 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3839681A JPS57152523A (en) 1981-03-16 1981-03-16 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57152523A true JPS57152523A (en) 1982-09-20

Family

ID=12524122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3839681A Pending JPS57152523A (en) 1981-03-16 1981-03-16 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57152523A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61123017A (en) * 1984-11-20 1986-06-10 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPS62119724A (en) * 1985-11-19 1987-06-01 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS63103417A (en) * 1986-10-20 1988-05-09 Fuji Photo Film Co Ltd Magnetic recording medium
JPS63121117A (en) * 1986-11-10 1988-05-25 Nippon Zeon Co Ltd Magnetic recording medium

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61123017A (en) * 1984-11-20 1986-06-10 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPH0518171B2 (en) * 1984-11-20 1993-03-11 Matsushita Electric Ind Co Ltd
JPS62119724A (en) * 1985-11-19 1987-06-01 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH0677306B2 (en) * 1985-11-19 1994-09-28 コニカ株式会社 Magnetic recording medium
JPS63103417A (en) * 1986-10-20 1988-05-09 Fuji Photo Film Co Ltd Magnetic recording medium
JPH0568767B2 (en) * 1986-10-20 1993-09-29 Fuji Photo Film Co Ltd
JPS63121117A (en) * 1986-11-10 1988-05-25 Nippon Zeon Co Ltd Magnetic recording medium
JPH0462415B2 (en) * 1986-11-10 1992-10-06 Nippon Zeon Co

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