JPS56101646A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56101646A
JPS56101646A JP516080A JP516080A JPS56101646A JP S56101646 A JPS56101646 A JP S56101646A JP 516080 A JP516080 A JP 516080A JP 516080 A JP516080 A JP 516080A JP S56101646 A JPS56101646 A JP S56101646A
Authority
JP
Japan
Prior art keywords
hydroxyl group
magnetic powder
terminals
positions
wear resistance
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
JP516080A
Other languages
Japanese (ja)
Inventor
Takezo Shimizu
Toshihiko Tanabe
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 JP516080A priority Critical patent/JPS56101646A/en
Publication of JPS56101646A publication Critical patent/JPS56101646A/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, wear resistance and the adhesive strength of a magnetic layer, by permitting magnetic powder to contain modified polyurethane resin, containing essentially polyurethane molecules having hydroxyl group, and thermoplastic saturated polyester resin at positions other than both terminals of principal chain as its binder components. CONSTITUTION:As the binder component of magnetic powder, modified polyurethane resin which contains polyurethane molecules having hydroxyl group at positions other than both terminals of principal chain is used. Consequently, the dispersibility of magnetic powder can be improved because of an influence of hydroxyl group, and crosslinking by low-molecular-weight polyisocyanate improves wear resistance and thermal resistance. Further, using thermoplastic saturated polyester resin in combination can improve greatly the strength of adhesion to the base of the magnetic layer.
JP516080A 1980-01-18 1980-01-18 Magnetic recording medium Pending JPS56101646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP516080A JPS56101646A (en) 1980-01-18 1980-01-18 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP516080A JPS56101646A (en) 1980-01-18 1980-01-18 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56101646A true JPS56101646A (en) 1981-08-14

Family

ID=11603495

Family Applications (1)

Application Number Title Priority Date Filing Date
JP516080A Pending JPS56101646A (en) 1980-01-18 1980-01-18 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56101646A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61270188A (en) * 1985-05-24 1986-11-29 Tomoegawa Paper Co Ltd Thermal recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61270188A (en) * 1985-05-24 1986-11-29 Tomoegawa Paper Co Ltd Thermal recording medium
JPH0422153B2 (en) * 1985-05-24 1992-04-15 Tomoegawa Paper Co Ltd

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