JPS56119924A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56119924A
JPS56119924A JP2192380A JP2192380A JPS56119924A JP S56119924 A JPS56119924 A JP S56119924A JP 2192380 A JP2192380 A JP 2192380A JP 2192380 A JP2192380 A JP 2192380A JP S56119924 A JPS56119924 A JP S56119924A
Authority
JP
Japan
Prior art keywords
magnetic powder
thermoplastic polyurethane
dialkylsulfosuccinate
dispersibility
succinate
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
JP2192380A
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 JP2192380A priority Critical patent/JPS56119924A/en
Publication of JPS56119924A publication Critical patent/JPS56119924A/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 the dispersibility of magnetic powder, and improve durability together with output and S/N by using a binder contg. a vinyl chloride-vinyl acetate copolymer, a thermoplastic polyurethane resin and dialkylsulfosuccinate. CONSTITUTION:The dialkylsulfosuccinate expressed by the formula (R1, R2 are alkyl, M is univalent metal) is added as a dispersant to magnetic powder in 0.1- 10wt% based on the latter. Good results are obtained by adding said succinate at the time of preparing the paint, but it is better to beforehand coat this on the surfaces of magnetic powder. A magnetic tape having the mangetic layer contg. the binder of such a compounding ratio that 10-90wt% of the total amount of a vinyl chloride-vinyl acetate copolymer (preferably the one having OH unit) and thermoplastic polyurethane is thermoplastic polyurethane plus the magnetic powder having been treated with the succinate is made. Thereby, the dispersibility of the magnetic powder is good and electromagnetic characteristics and durability, etc. improved. Further, if low mol.wt. polyisocyanate is suitably added, abrasion resistance, heat resistance, etc. are more improved.
JP2192380A 1980-02-22 1980-02-22 Magnetic recording medium Pending JPS56119924A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2192380A JPS56119924A (en) 1980-02-22 1980-02-22 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2192380A JPS56119924A (en) 1980-02-22 1980-02-22 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56119924A true JPS56119924A (en) 1981-09-19

Family

ID=12068583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2192380A Pending JPS56119924A (en) 1980-02-22 1980-02-22 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56119924A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58203623A (en) * 1982-05-21 1983-11-28 Dainippon Ink & Chem Inc Binder used for magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58203623A (en) * 1982-05-21 1983-11-28 Dainippon Ink & Chem Inc Binder used for magnetic recording medium
JPH0534369B2 (en) * 1982-05-21 1993-05-21 Dainippon Ink & Chemicals

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