JPS5792423A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5792423A
JPS5792423A JP16547480A JP16547480A JPS5792423A JP S5792423 A JPS5792423 A JP S5792423A JP 16547480 A JP16547480 A JP 16547480A JP 16547480 A JP16547480 A JP 16547480A JP S5792423 A JPS5792423 A JP S5792423A
Authority
JP
Japan
Prior art keywords
hydrophilic group
recording medium
magnetic recording
magnetic
molecular weight
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
JP16547480A
Other languages
Japanese (ja)
Inventor
Masashi Somezawa
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP16547480A priority Critical patent/JPS5792423A/en
Publication of JPS5792423A publication Critical patent/JPS5792423A/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

Landscapes

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

Abstract

PURPOSE:To obtain a medium which has improved dispersibility of magnetic powder by containing in a magnetic layer polyurethane resin or polyester resin which has sulfonic acid (its alkali metal salt) as a hydrophilic group and 200- 50,000 molecular weight per hydrophilic group. CONSTITUTION:Polyurethane resin or polyester resin which has >=1 hydrophilic group -SO3M (M: H, Li, Na, or K) and 200-50,000 molecular weight per hydrophilic group is contained as a binding agent in a magnetic layer to obtain a magnetic recording medium. Consequently, magnetic powder is dispersed uniformly to lessen its disconnection during use, thereby obtaining improving the durability of the magnetic recording medium while making characteristic hard to deteriorate.
JP16547480A 1980-11-25 1980-11-25 Magnetic recording medium Pending JPS5792423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16547480A JPS5792423A (en) 1980-11-25 1980-11-25 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16547480A JPS5792423A (en) 1980-11-25 1980-11-25 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5792423A true JPS5792423A (en) 1982-06-09

Family

ID=15813089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16547480A Pending JPS5792423A (en) 1980-11-25 1980-11-25 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5792423A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS595424A (en) * 1982-07-01 1984-01-12 Sony Corp Magnetic recording medium
JPS598127A (en) * 1982-07-05 1984-01-17 Sony Corp Magnetic recording medium
WO1984000240A1 (en) * 1982-07-01 1984-01-19 Sony Corp Magnetic recording medium
JPS5979427A (en) * 1982-10-29 1984-05-08 Sony Corp Magnetic recording medium
JPS6057527A (en) * 1983-09-08 1985-04-03 Fuji Photo Film Co Ltd Magnetic recording medium
JPS6076018A (en) * 1983-09-30 1985-04-30 Sony Corp Magnetic recording medium
JPS60258725A (en) * 1984-06-05 1985-12-20 Dainippon Ink & Chem Inc Binder for magnetic recording medium
JPS6159623A (en) * 1984-08-29 1986-03-27 Hitachi Maxell Ltd Magnetic recording medium
JPS61180927A (en) * 1985-02-06 1986-08-13 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPS63157315A (en) * 1986-12-22 1988-06-30 Fuji Photo Film Co Ltd Magnetic recording medium
US6274227B1 (en) 1995-02-23 2001-08-14 Imation Corp. Magnetic recording medium having a magnetic layer and a coating thereunder

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0159646B2 (en) * 1982-07-01 1989-12-19 Sony Corp
WO1984000241A1 (en) * 1982-07-01 1984-01-19 Sony Corp Magnetic recording medium
WO1984000240A1 (en) * 1982-07-01 1984-01-19 Sony Corp Magnetic recording medium
JPS595424A (en) * 1982-07-01 1984-01-12 Sony Corp Magnetic recording medium
JPS598127A (en) * 1982-07-05 1984-01-17 Sony Corp Magnetic recording medium
JPH0379764B2 (en) * 1982-07-05 1991-12-19 Sonii Kk
JPS5979427A (en) * 1982-10-29 1984-05-08 Sony Corp Magnetic recording medium
JPS6057527A (en) * 1983-09-08 1985-04-03 Fuji Photo Film Co Ltd Magnetic recording medium
JPS6076018A (en) * 1983-09-30 1985-04-30 Sony Corp Magnetic recording medium
JPH0576090B2 (en) * 1983-09-30 1993-10-21 Sony Corp
JPS60258725A (en) * 1984-06-05 1985-12-20 Dainippon Ink & Chem Inc Binder for magnetic recording medium
JPH0581968B2 (en) * 1984-06-05 1993-11-17 Dainippon Ink & Chemicals
JPS6159623A (en) * 1984-08-29 1986-03-27 Hitachi Maxell Ltd Magnetic recording medium
JPH0470686B2 (en) * 1984-08-29 1992-11-11 Hitachi Maxell
JPS61180927A (en) * 1985-02-06 1986-08-13 Matsushita Electric Ind Co Ltd Magnetic recording medium
JPH0535483B2 (en) * 1985-02-06 1993-05-26 Matsushita Electric Ind Co Ltd
JPS63157315A (en) * 1986-12-22 1988-06-30 Fuji Photo Film Co Ltd Magnetic recording medium
US6274227B1 (en) 1995-02-23 2001-08-14 Imation Corp. Magnetic recording medium having a magnetic layer and a coating thereunder

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