JPS54135507A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS54135507A JPS54135507A JP4355678A JP4355678A JPS54135507A JP S54135507 A JPS54135507 A JP S54135507A JP 4355678 A JP4355678 A JP 4355678A JP 4355678 A JP4355678 A JP 4355678A JP S54135507 A JPS54135507 A JP S54135507A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- degradation
- magnetic
- prepare
- recording medium
- 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.)
- Granted
Links
Abstract
PURPOSE: To produce magnetic coating free from degradation in performance despite long term exposure by using a binder composed of hardening components compounded with the specific polyether base surface active agent.
CONSTITUTION: The polyether base surface active agent expressed by R-(C2H4O)n OOCR(R is alkyl, alkyl phenyl; n is integer of over 1) is compounded to the hardening components comprising adding a hardener to a thermoplastic polyurethane resin, vinyl chloride-vinyl acetate copolymer, etc. to prepare the binder. To this is mixed magnetic powder such as γ-Fe2O3 to prepare the magnetic coating. Even if the abovementioned magnetic coating is used after lapse of a long time after the preparation, no degradation in performance is observed as compared to the use immediate after the preparation, thus coating this on a substrate such as polyester film enables the magnetic recording medium of superior properties such as orientation characteristic, surface characteristic and others to be produced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4355678A JPS54135507A (en) | 1978-04-13 | 1978-04-13 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4355678A JPS54135507A (en) | 1978-04-13 | 1978-04-13 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54135507A true JPS54135507A (en) | 1979-10-20 |
JPS5746128B2 JPS5746128B2 (en) | 1982-10-01 |
Family
ID=12667016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4355678A Granted JPS54135507A (en) | 1978-04-13 | 1978-04-13 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54135507A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS598129A (en) * | 1982-07-06 | 1984-01-17 | Matsushita Electric Ind Co Ltd | Flexible magnetic disk |
-
1978
- 1978-04-13 JP JP4355678A patent/JPS54135507A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS598129A (en) * | 1982-07-06 | 1984-01-17 | Matsushita Electric Ind Co Ltd | Flexible magnetic disk |
JPH0456368B2 (en) * | 1982-07-06 | 1992-09-08 | Matsushita Electric Ind Co Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPS5746128B2 (en) | 1982-10-01 |
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