JPS57138052A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57138052A
JPS57138052A JP56023831A JP2383181A JPS57138052A JP S57138052 A JPS57138052 A JP S57138052A JP 56023831 A JP56023831 A JP 56023831A JP 2383181 A JP2383181 A JP 2383181A JP S57138052 A JPS57138052 A JP S57138052A
Authority
JP
Japan
Prior art keywords
molecular weight
low molecular
polyurethane prepolymer
fluorine compound
magnetic layer
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.)
Granted
Application number
JP56023831A
Other languages
Japanese (ja)
Other versions
JPH0413767B2 (en
Inventor
Nobuaki Ogoshi
Kazuto Karashima
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 JP56023831A priority Critical patent/JPS57138052A/en
Publication of JPS57138052A publication Critical patent/JPS57138052A/en
Publication of JPH0413767B2 publication Critical patent/JPH0413767B2/ja
Granted 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
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction

Landscapes

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

Abstract

PURPOSE:To improve the wear-proof, anit-chemical and coated film strength, by providing a protective layer including cellulose resin, polyurethane prepolymer, low molecular weight isocyanate compound as main components and including a low molecular weight fluorine compound of a magnetic layer surface. CONSTITUTION:A protective layer including cellulose resin, polyurethane prepolymer and low molecular isocyanate as major components and including low molecular weight fluorine compound, having <=10,000 molecular weight, is provided on a magnetic layer. For example, 265pts.wt. ''Nitrocellulose H 1 200pts. ''Takelac E-551 '' (polyurethane prepolymer), 20pts. ''Desmodur L '' (low molecular weight polyisocyanate). ''Biducks AR '' (low molecular weight fluorine compound), 250pts. toluene, and 250pts, methy isobutyl ketone are used as mixture and a protective paint layer 3 is provided on a magnetic layer 2 on a polyester film 1. Thus, the abrasion resistance, the resistance to chemicals and the strength of coated film are improved.
JP56023831A 1981-02-19 1981-02-19 Magnetic recording medium Granted JPS57138052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56023831A JPS57138052A (en) 1981-02-19 1981-02-19 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56023831A JPS57138052A (en) 1981-02-19 1981-02-19 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS57138052A true JPS57138052A (en) 1982-08-26
JPH0413767B2 JPH0413767B2 (en) 1992-03-10

Family

ID=12121321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56023831A Granted JPS57138052A (en) 1981-02-19 1981-02-19 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57138052A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922226A (en) * 1982-07-29 1984-02-04 Sony Corp Magnetic recording medium
JP2020107374A (en) * 2018-12-26 2020-07-09 共同印刷株式会社 Optical recording medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5151306A (en) * 1974-10-31 1976-05-06 Fuji Photo Film Co Ltd JIKIKIROKUBAITAI
JPS5270276A (en) * 1975-12-08 1977-06-11 Ball Brothers Res Corp Lubricating method of lubricating composition and base material and lubricated base material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5151306A (en) * 1974-10-31 1976-05-06 Fuji Photo Film Co Ltd JIKIKIROKUBAITAI
JPS5270276A (en) * 1975-12-08 1977-06-11 Ball Brothers Res Corp Lubricating method of lubricating composition and base material and lubricated base material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922226A (en) * 1982-07-29 1984-02-04 Sony Corp Magnetic recording medium
JPH0480449B2 (en) * 1982-07-29 1992-12-18 Sony Corp
JP2020107374A (en) * 2018-12-26 2020-07-09 共同印刷株式会社 Optical recording medium

Also Published As

Publication number Publication date
JPH0413767B2 (en) 1992-03-10

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