JPS57190303A - Easily dispersible magnetic material composition and manufacture thereof - Google Patents

Easily dispersible magnetic material composition and manufacture thereof

Info

Publication number
JPS57190303A
JPS57190303A JP56074975A JP7497581A JPS57190303A JP S57190303 A JPS57190303 A JP S57190303A JP 56074975 A JP56074975 A JP 56074975A JP 7497581 A JP7497581 A JP 7497581A JP S57190303 A JPS57190303 A JP S57190303A
Authority
JP
Japan
Prior art keywords
resin
solvent
magnetic material
powder
deposit
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
JP56074975A
Other languages
Japanese (ja)
Inventor
Katsumi Kuriyama
Setsuo Hirose
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.)
UKIMA GOSEI KK
Dainichiseika Color and Chemicals Mfg Co Ltd
Original Assignee
UKIMA GOSEI KK
Dainichiseika Color and Chemicals Mfg Co 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 UKIMA GOSEI KK, Dainichiseika Color and Chemicals Mfg Co Ltd filed Critical UKIMA GOSEI KK
Priority to JP56074975A priority Critical patent/JPS57190303A/en
Publication of JPS57190303A publication Critical patent/JPS57190303A/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
    • G11B5/712—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 surface treatment or coating of magnetic particles

Abstract

PURPOSE:To improve magnetic characteristic by a method wherein the mixture constituted of a resin solubke in a solvent and the solvent thereof is mixed with the powder of magnetic material, and next, another solvent insoluble in said resin is added to deposit a component constituting of said powder and the resin coating powder surface. CONSTITUTION:The resin soluble to the powder of magnetic material and solvent for magnetic material containing paints and the solvent of the resin are put in a bowl mill to prepare mill base by milling. Next, this mill base is stirred up with the gradual addition of other solvent mutually soluble to the solvent of resin not dissolving resin to deposit a component constituting of magnetic material powder and resin coating powder surface. After washing the deposit until the perfect removal of the solvent of the resin by the solvent not dissolving resin, the deposit is dried. Thus, dispersible magnetic material composition can be obtained which causes no change in magnetic characteristic under long storage.
JP56074975A 1981-05-20 1981-05-20 Easily dispersible magnetic material composition and manufacture thereof Pending JPS57190303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56074975A JPS57190303A (en) 1981-05-20 1981-05-20 Easily dispersible magnetic material composition and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56074975A JPS57190303A (en) 1981-05-20 1981-05-20 Easily dispersible magnetic material composition and manufacture thereof

Publications (1)

Publication Number Publication Date
JPS57190303A true JPS57190303A (en) 1982-11-22

Family

ID=13562794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56074975A Pending JPS57190303A (en) 1981-05-20 1981-05-20 Easily dispersible magnetic material composition and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS57190303A (en)

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