JPS5584033A - Manufacture of magnetic recording medium - Google Patents
Manufacture of magnetic recording mediumInfo
- Publication number
- JPS5584033A JPS5584033A JP15956978A JP15956978A JPS5584033A JP S5584033 A JPS5584033 A JP S5584033A JP 15956978 A JP15956978 A JP 15956978A JP 15956978 A JP15956978 A JP 15956978A JP S5584033 A JPS5584033 A JP S5584033A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- recording medium
- magnetic recording
- binding agent
- mixture
- 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
Links
Abstract
PURPOSE: To obtain a magnetic recording medium featuring the high magnetism keeping power, narrow magnetism keeping power distribution width and small aging of the characteristics each, by coating the specific ferromagnetic metal powder on the substrate via the binding agent of the mixture of the isocyanate and the copolymer of functional group content vinyl chloride-vinyl acetate.
CONSTITUTION: The α-Fe2O3 powder is formed by heating and dehydrating the α-oxy-iron hydroxide obtained form the alkaline solution (preferably caustic potash, caustic soda for alkali material). This powder is then soaked into the silicone oil solution with the sintering preventing process applied and then receives the heat reduction to obtain the ferromagnetic metal powder. Thus the magnetic powder is coated on the substrate via the binding agent of the mixture of the vinyl chloride- vinyl acetate copolymer (like those 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). Thus the magnetic recording medium is obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15956978A JPS5584033A (en) | 1978-12-20 | 1978-12-20 | Manufacture of magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15956978A JPS5584033A (en) | 1978-12-20 | 1978-12-20 | Manufacture of magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5584033A true JPS5584033A (en) | 1980-06-24 |
Family
ID=15696579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15956978A Pending JPS5584033A (en) | 1978-12-20 | 1978-12-20 | Manufacture of magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5584033A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4400435A (en) * | 1980-07-22 | 1983-08-23 | Tdk Electronics Co., Ltd. | Magnetic recording medium |
JPS5977629A (en) * | 1982-10-25 | 1984-05-04 | Kao Corp | Production of magnetic recording medium |
US4481253A (en) * | 1981-12-10 | 1984-11-06 | Fuji Photo Film Co., Ltd. | Process for preparing ferromagnetic metal powder and a magnetic recording medium including the powder |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529900A (en) * | 1975-07-15 | 1977-01-25 | Hitachi Ltd | Manufacturing method of ferromagnetic metallic powder |
-
1978
- 1978-12-20 JP JP15956978A patent/JPS5584033A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS529900A (en) * | 1975-07-15 | 1977-01-25 | Hitachi Ltd | Manufacturing method of ferromagnetic metallic powder |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4400435A (en) * | 1980-07-22 | 1983-08-23 | Tdk Electronics Co., Ltd. | Magnetic recording medium |
US4481253A (en) * | 1981-12-10 | 1984-11-06 | Fuji Photo Film Co., Ltd. | Process for preparing ferromagnetic metal powder and a magnetic recording medium including the powder |
JPS5977629A (en) * | 1982-10-25 | 1984-05-04 | Kao Corp | Production of magnetic recording medium |
JPH0332133B2 (en) * | 1982-10-25 | 1991-05-10 | Kao Corp |
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