JPS5584035A - Manufacture of magnetic recording medium - Google Patents

Manufacture of magnetic recording medium

Info

Publication number
JPS5584035A
JPS5584035A JP15957178A JP15957178A JPS5584035A JP S5584035 A JPS5584035 A JP S5584035A JP 15957178 A JP15957178 A JP 15957178A JP 15957178 A JP15957178 A JP 15957178A JP S5584035 A JPS5584035 A JP S5584035A
Authority
JP
Japan
Prior art keywords
silicone oil
powder
oil film
magnetic powder
soaked
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
JP15957178A
Other languages
Japanese (ja)
Inventor
Seiichi Asada
Akira Miyake
Akinari Hayashi
Shigeo Hirai
Nariyuki Hosoo
Yoshinori Yamamoto
Masahiro Amamiya
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.)
Hitachi Ltd
Maxell Holdings Ltd
Original Assignee
Hitachi Ltd
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 Ltd, Hitachi Maxell Ltd filed Critical Hitachi Ltd
Priority to JP15957178A priority Critical patent/JPS5584035A/en
Publication of JPS5584035A publication Critical patent/JPS5584035A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a magnetic recording medium featuring the narrow magnetism keeping power distribution width and small aging of the characteristics by coating the specific ferromagnetic metal powder with the silicone oil film formed on the surface onto the substrate via the bonding agent of the mixture of the functional group content vinyl chloride-vinyl acetate copolymer and the isocyanate.
CONSTITUTION: The iron oxide powder (such as the α-Fe2O3 powder obtained by heating and dehydrating the α-oxy-iron hydroxide obtained from the alkaline solution) is soaked into the silicone oil solution with the heat reduction applied to obtain the ferromagnetic metal powder. Then this magnetic powder is soaked into the silicone oil solution and then dried at about 200W300°C to form the silicone oil film on the surface of the magnetic powder. After this, the magnetic powder with the silicone oil film is coated onto the substrate along with the mixture of the vinyl chloride-vinyl acetate copolymer (like that manufactured by VAGH, UCC company) containing the hydroxyl group or the carboxyl group in the molecule and the isocyanate compound (like Takenate L-1007 manufactured by TAKEDA YAKUHIN KK).
COPYRIGHT: (C)1980,JPO&Japio
JP15957178A 1978-12-20 1978-12-20 Manufacture of magnetic recording medium Pending JPS5584035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15957178A JPS5584035A (en) 1978-12-20 1978-12-20 Manufacture of magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15957178A JPS5584035A (en) 1978-12-20 1978-12-20 Manufacture of magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5584035A true JPS5584035A (en) 1980-06-24

Family

ID=15696620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15957178A Pending JPS5584035A (en) 1978-12-20 1978-12-20 Manufacture of magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5584035A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56169304A (en) * 1980-05-30 1981-12-26 Mitsui Toatsu Chem Inc Ferromagnetic metal iron corpuscle for magnetic recording

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56169304A (en) * 1980-05-30 1981-12-26 Mitsui Toatsu Chem Inc Ferromagnetic metal iron corpuscle for magnetic recording

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