JPS57154634A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57154634A
JPS57154634A JP56041478A JP4147881A JPS57154634A JP S57154634 A JPS57154634 A JP S57154634A JP 56041478 A JP56041478 A JP 56041478A JP 4147881 A JP4147881 A JP 4147881A JP S57154634 A JPS57154634 A JP S57154634A
Authority
JP
Japan
Prior art keywords
recording medium
magnetic recording
5pts
block copolymer
iron oxide
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
JP56041478A
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 JP56041478A priority Critical patent/JPS57154634A/en
Publication of JPS57154634A publication Critical patent/JPS57154634A/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

  • Magnetic Record Carriers (AREA)
  • Lubricants (AREA)
  • Paints Or Removers (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 fatty acid and a polyoxyethylene polyoxypropylene block copolymer. CONSTITUTION:A magnetic coating material consisting of 0.1-5pts.wt. 10-18C higher saturated fatty acid such as lauric acid or stearic acid and 0.1-5pts.wt. polyoxyethylene polyoxypropylene block copolymer is added to 100pts.wt. iron oxide magnetic powder consisting of gamma-Fe2O3, Fe3O4, or an intermediate compound between these compounds contg. The product is coated on a base material to obtain a magnetic recording medium.
JP56041478A 1981-03-20 1981-03-20 Magnetic recording medium Pending JPS57154634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56041478A JPS57154634A (en) 1981-03-20 1981-03-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56041478A JPS57154634A (en) 1981-03-20 1981-03-20 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57154634A true JPS57154634A (en) 1982-09-24

Family

ID=12609453

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56041478A Pending JPS57154634A (en) 1981-03-20 1981-03-20 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57154634A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201305A2 (en) * 1985-05-03 1986-11-12 Minnesota Mining And Manufacturing Company Smooth, low-friction magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201305A2 (en) * 1985-05-03 1986-11-12 Minnesota Mining And Manufacturing Company Smooth, low-friction magnetic recording medium

Similar Documents

Publication Publication Date Title
IE45225L (en) Dicarboxylic acid bis-(3,5-dicarbamoyl-2,4,6-triiodoanilide)¹compounds
JPS53149302A (en) Magnetic recording medium
ES468596A1 (en) Stabilized ferromagnetic chromium dioxide and process for its preparation
JPS5414711A (en) Magnetic recording medium
JPS525498A (en) Ferromagnetic grit manufacturing process
JPS5668928A (en) Magnetic recording medium
JPS57154634A (en) Magnetic recording medium
JPS56156706A (en) Manufacture of magnetic metallic powder
JPS5254998A (en) Oxidation treatment process of metallic magnetic powder for magnetic r ecording medium
JPS52136159A (en) Anti/malignanttumor containing the same as active ingredients
JPS54106895A (en) Ferromagnetic powder
JPS57154631A (en) Magnetic recording medium
JPS5654637A (en) Magnetic recording medium
JPS57154627A (en) Magnetic recording medium
JPS57154633A (en) Magnetic recording medium
JPS57154626A (en) Magnetic recording medium
JPS57154632A (en) Magnetic recording medium
JPS57154630A (en) Magnetic recording medium
JPS5583209A (en) Ferromagnetic powder and preparing the same
JPS5315802A (en) High density magnetic recording material
JPS57154628A (en) Magnetic recording medium
JPS53107315A (en) Magnetic recording method
JPS5752106A (en) Magnetic powder for magnetic recording
JPS5251407A (en) Lubricnt composition
JPS57154629A (en) Magnetic recording medium