JPS56105331A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56105331A
JPS56105331A JP492880A JP492880A JPS56105331A JP S56105331 A JPS56105331 A JP S56105331A JP 492880 A JP492880 A JP 492880A JP 492880 A JP492880 A JP 492880A JP S56105331 A JPS56105331 A JP S56105331A
Authority
JP
Japan
Prior art keywords
magnetic
recording medium
molecular weight
binder components
magnetic recording
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
JP492880A
Other languages
Japanese (ja)
Inventor
Osamu Saito
Fumio Togawa
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 JP492880A priority Critical patent/JPS56105331A/en
Publication of JPS56105331A publication Critical patent/JPS56105331A/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 to improve durability of the magnetic recording medium, by using a specific modified polyurethane resin and the vinyl chloride-vinyl propionate copolymer as binder components. CONSTITUTION:3-50wt% low molecular weight polyisocyanate (C) of <=10,000 molecular weight such as 2,4-tolylene diisocyanate is mixed with the composite where modified polyurethane resin (A) of 10,000-100,000 average molecular weight containing polyurethane molecules, where hydroxyl groups in positions other than both ends of the principal chain are connected directly to the principal chain, and vinyl chloride vinyl proproanate copolymer (B) of 200-600 are polymerization degree are mixed in the weight ratio of 9:1-1:9, 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. As a result, a magnetic recording medium is obtained which is superior in electric conversion characteristics such as the output and the SN ratio.
JP492880A 1980-01-19 1980-01-19 Magnetic recording medium Pending JPS56105331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP492880A JPS56105331A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP492880A JPS56105331A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56105331A true JPS56105331A (en) 1981-08-21

Family

ID=11597250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP492880A Pending JPS56105331A (en) 1980-01-19 1980-01-19 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56105331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108031A (en) * 1981-12-21 1983-06-28 Dainippon Ink & Chem Inc Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108031A (en) * 1981-12-21 1983-06-28 Dainippon Ink & Chem Inc Magnetic recording medium

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