JPS6484416A - Disk-shaped magnetic recording medium - Google Patents
Disk-shaped magnetic recording mediumInfo
- Publication number
- JPS6484416A JPS6484416A JP24190387A JP24190387A JPS6484416A JP S6484416 A JPS6484416 A JP S6484416A JP 24190387 A JP24190387 A JP 24190387A JP 24190387 A JP24190387 A JP 24190387A JP S6484416 A JPS6484416 A JP S6484416A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- incorporating
- group
- acid groups
- magnetic layer
- 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
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve the dispersibility of magnetic powder as well as electromagnetic conversion characteristics and durability in and under a wide range of service environment and conditions by incorporating a specific resin and ferromagnetic material particles having a prescribed BET value into the binder of a magnetic layer. CONSTITUTION:The magnetic layer is formed by incorporating the vinyl chloride resin having at least one kind of acid groups or the acid groups forming the salts thereof as well as an epoxy group and hydroxyl group into the binder resin of the above-mentioned magnetic layer, incorporating the ferromagnetic particles having 15-25m<2>/g BET value into said resin, kneading and dispersing the mixture and coating the mixture on a nonmagnetic substrate. The ferromagnetic powder is preferably gamma-iron oxide, Co-deposited=gamma-iron oxide, iron, etc. The BET value is 15-25m<2>/g and the axial ratio of acicular particles is preferably 3-15, more particularly preferably 5-9. The acid groups to be introduced into the vinyl chloride resin are preferably a sulfo group, phospho group and carboxyl group. The metals for forming the salts are preferably Li, K and Na.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24190387A JPS6484416A (en) | 1987-09-25 | 1987-09-25 | Disk-shaped magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24190387A JPS6484416A (en) | 1987-09-25 | 1987-09-25 | Disk-shaped magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6484416A true JPS6484416A (en) | 1989-03-29 |
Family
ID=17081268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24190387A Pending JPS6484416A (en) | 1987-09-25 | 1987-09-25 | Disk-shaped magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6484416A (en) |
-
1987
- 1987-09-25 JP JP24190387A patent/JPS6484416A/en active Pending
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