JPS551636A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS551636A JPS551636A JP7436578A JP7436578A JPS551636A JP S551636 A JPS551636 A JP S551636A JP 7436578 A JP7436578 A JP 7436578A JP 7436578 A JP7436578 A JP 7436578A JP S551636 A JPS551636 A JP S551636A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic layer
- magnetic
- liquid paraffin
- phthalic
- acid ester
- 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 improve the defacement-proof property of a magnetic layer to make a magnetic recording medium superior in durability by causing the magnetic layer, where a specific resin is a binder, to include liquid paraffin and phthalic-acid ester.
CONSTITUTION: Drift paraffin and phthalic-acid ester are added and mixed to the magnetic paint where a mixture of a vinyl chloride-vinyl acetate system copolymer and an urethane polymer is a binder for magnetic powder. The obtained paint is applied onto a substrate and is dried, and a magnetic layer is formed. As regards drift paraffin, 0.5 to 1 weight % for magnetic powder is used, and it is desirable that the weight ratio of phthalic-acid ester to liquid paraffin is 1/1 to 1/10. As a result, liquid paraffin over a required quantity can be prevented from exuding onto the magnetic layer surface even in case of a large quantity of liquid paraffin, and lubrication effects superior in long-time stability can be obtained, and the defacement-proof property of the magnetic layer is improved furthermore.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7436578A JPS6049972B2 (en) | 1978-06-20 | 1978-06-20 | magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7436578A JPS6049972B2 (en) | 1978-06-20 | 1978-06-20 | magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS551636A true JPS551636A (en) | 1980-01-08 |
JPS6049972B2 JPS6049972B2 (en) | 1985-11-06 |
Family
ID=13545047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7436578A Expired JPS6049972B2 (en) | 1978-06-20 | 1978-06-20 | magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6049972B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4699817A (en) * | 1985-05-01 | 1987-10-13 | Victor Company Of Japan, Ltd. | Magnetic recording medium |
-
1978
- 1978-06-20 JP JP7436578A patent/JPS6049972B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4699817A (en) * | 1985-05-01 | 1987-10-13 | Victor Company Of Japan, Ltd. | Magnetic recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPS6049972B2 (en) | 1985-11-06 |
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