JPS57154632A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57154632A
JPS57154632A JP56041476A JP4147681A JPS57154632A JP S57154632 A JPS57154632 A JP S57154632A JP 56041476 A JP56041476 A JP 56041476A JP 4147681 A JP4147681 A JP 4147681A JP S57154632 A JPS57154632 A JP S57154632A
Authority
JP
Japan
Prior art keywords
fatty acid
acid
recording medium
5pts
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
JP56041476A
Other languages
Japanese (ja)
Inventor
Fumio Togawa
Haruo Ando
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 JP56041476A priority Critical patent/JPS57154632A/en
Publication of JPS57154632A publication Critical patent/JPS57154632A/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
    • G11B5/71—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 lubricant

Landscapes

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

Abstract

PURPOSE:To improve the dispersibility and the running property and to suppress dropping-out of powder, by allowing a magnetic coating material, where iron oxide magnetic powder containing Co is used, to contain a higher saturated fatty acid and fatty acid sorbitan ester. CONSTITUTION:A magnetic coating material consising of 0.1-5pts.wt. 10-18C higher saturated fatty acid such as lauric acid or stearic acid and 0.1-5pts.wt. fatty acid sorbitan ester obtained by the esterification reaction between a sorbitol condensate and various fatty acid such as lauric acid, stearic acid, or oleic acid is added to 100pts.wt. iron oxide magnetic powder consisting of gamma- Fe2O3, Fe3O4, or an intermediate compound between these compounds contg. Co. The product is coated on a base material to obtain a magnetic recording medium.
JP56041476A 1981-03-20 1981-03-20 Magnetic recording medium Pending JPS57154632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56041476A JPS57154632A (en) 1981-03-20 1981-03-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56041476A JPS57154632A (en) 1981-03-20 1981-03-20 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57154632A true JPS57154632A (en) 1982-09-24

Family

ID=12609405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56041476A Pending JPS57154632A (en) 1981-03-20 1981-03-20 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57154632A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6157035A (en) * 1984-08-28 1986-03-22 Konishiroku Photo Ind Co Ltd Magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6157035A (en) * 1984-08-28 1986-03-22 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH0568009B2 (en) * 1984-08-28 1993-09-28 Konishiroku Photo Ind

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