JPS57150127A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57150127A
JPS57150127A JP3585981A JP3585981A JPS57150127A JP S57150127 A JPS57150127 A JP S57150127A JP 3585981 A JP3585981 A JP 3585981A JP 3585981 A JP3585981 A JP 3585981A JP S57150127 A JPS57150127 A JP S57150127A
Authority
JP
Japan
Prior art keywords
recording medium
diisocyanate
magnetic recording
magnetic layer
formula
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
JP3585981A
Other languages
Japanese (ja)
Other versions
JPH0318249B2 (en
Inventor
Masahiro Amamiya
Akira Okazoe
Akira Miyake
Hiroshi Zaitsu
Yoshinori Yamamoto
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 JP3585981A priority Critical patent/JPS57150127A/en
Publication of JPS57150127A publication Critical patent/JPS57150127A/en
Publication of JPH0318249B2 publication Critical patent/JPH0318249B2/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
    • G11B5/68—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

Abstract

PURPOSE:To increase the dispersibility of magnetic powder and the heat-resisting property of a magnetic layer, by using simultaneously a specific urethane resin and an isocyanate compound as the component of binder for magnetic layer formation of a magnetic recording medium. CONSTITUTION:(A) an urethane resin having >10,000mol.wt. and hydroxyl group at the end, including a kind of isocyanate component which is selected from isophorone diisocyanate of formulaI, hydrogenated xylene diisocyanate of formula II, hydrogenated tolylene diisocyanate of formula III, and hydrogenated diphenylmethane diisocyanate of formula IV, and (B) isocyanate compound having <=2,000mol.wt. and >=2 isocyanate groups (e.g., tolylene diisocyanate) are mixed in the range of 9:1-5:5 weight ratio. A magnetic layer is formed by using this mixture as a binder to achieve an objective magnetic recording medium.
JP3585981A 1981-03-11 1981-03-11 Magnetic recording medium Granted JPS57150127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3585981A JPS57150127A (en) 1981-03-11 1981-03-11 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3585981A JPS57150127A (en) 1981-03-11 1981-03-11 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS57150127A true JPS57150127A (en) 1982-09-16
JPH0318249B2 JPH0318249B2 (en) 1991-03-12

Family

ID=12453702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3585981A Granted JPS57150127A (en) 1981-03-11 1981-03-11 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57150127A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6055516A (en) * 1983-09-06 1985-03-30 Toshiba Corp Magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55139634A (en) * 1979-04-16 1980-10-31 Hitachi Maxell Ltd Magnetic recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55139634A (en) * 1979-04-16 1980-10-31 Hitachi Maxell Ltd Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6055516A (en) * 1983-09-06 1985-03-30 Toshiba Corp Magnetic recording medium

Also Published As

Publication number Publication date
JPH0318249B2 (en) 1991-03-12

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