JPS56105334A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56105334A
JPS56105334A JP729680A JP729680A JPS56105334A JP S56105334 A JPS56105334 A JP S56105334A JP 729680 A JP729680 A JP 729680A JP 729680 A JP729680 A JP 729680A JP S56105334 A JPS56105334 A JP S56105334A
Authority
JP
Japan
Prior art keywords
magnetic
vinyl
copolymer
binder components
vinyl chloride
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
JP729680A
Other languages
Japanese (ja)
Inventor
Akira Okazoe
Shozo Ide
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 JP729680A priority Critical patent/JPS56105334A/en
Publication of JPS56105334A publication Critical patent/JPS56105334A/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 dispersibility of magnetic powder and the heat-resistant property of the magnetic layer, by using a specific copolymer and an urethane prepolymer as binder components of magnetic powder. CONSTITUTION:3-50wt% trifunctional low-molecular weight isocyanate compound (C) is added to the material where one copolymer (A) selected from the vinyl chloride-vinyl acetate copolymer, the vinyl chloride-vinyl acetate-vinyl alcohol copolymer containing 6wt% vinyl alcohol, and the vinyl chloride-vinyl acetatemaleic acid copolymer and 5-60wt% urethane polymer (B) of 1,000-10,000 molecular weight having the urethane radical and having the hydroxyl radical at the terminal are mixed, thereby obtaining binder components. Next, the magnetic coating material obtained by dispersing these binder components and magnetic powder in the organic solvent is applied onto the substance and is dried to form a magnetic layer. A magnetic recording medium is obtained which has a high maximum magnetic flux density and is superior in flexibility.
JP729680A 1980-01-23 1980-01-23 Magnetic recording medium Pending JPS56105334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP729680A JPS56105334A (en) 1980-01-23 1980-01-23 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP729680A JPS56105334A (en) 1980-01-23 1980-01-23 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56105334A true JPS56105334A (en) 1981-08-21

Family

ID=11662062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP729680A Pending JPS56105334A (en) 1980-01-23 1980-01-23 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56105334A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113524A (en) * 1982-12-20 1984-06-30 Tohoku Metal Ind Ltd Magnetic recording medium
JPS59113525A (en) * 1982-12-20 1984-06-30 Tohoku Metal Ind Ltd Magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113524A (en) * 1982-12-20 1984-06-30 Tohoku Metal Ind Ltd Magnetic recording medium
JPS59113525A (en) * 1982-12-20 1984-06-30 Tohoku Metal Ind Ltd Magnetic recording medium

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