JPS644920A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS644920A JPS644920A JP16183887A JP16183887A JPS644920A JP S644920 A JPS644920 A JP S644920A JP 16183887 A JP16183887 A JP 16183887A JP 16183887 A JP16183887 A JP 16183887A JP S644920 A JPS644920 A JP S644920A
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane
- salt
- recording medium
- binder
- contg
- 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
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve the dispersibility of CrO2 powder and durability by incorporating polybutyrene adipate polyurethane contg. a sulfo group or the salt thereof and polycaprolactone polyurethane contg. a carboxyl group or the salt thereof into a binder. CONSTITUTION:This recording medium has a magnetic layer contg. the magnetic CrO2 powder and the binder on a base. This binder contains the polybutyrene adipate polyurethane having the sulfo group or the salt thereof and the polycaprolactone polyurethane having the carboxyl group or the salt thereof and contains, if necessary, other binder resins and hardener. The weight ratio of the polybutyrene adipate polyurethane/polycaprolactone polyurethane is 3/1-1/3. The dispersibility of the CrO2 powder is thereby improved and the recording medium having the excellent durability is obtd.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16183887A JPH0695379B2 (en) | 1987-06-29 | 1987-06-29 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16183887A JPH0695379B2 (en) | 1987-06-29 | 1987-06-29 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS644920A true JPS644920A (en) | 1989-01-10 |
JPH0695379B2 JPH0695379B2 (en) | 1994-11-24 |
Family
ID=15742894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16183887A Expired - Lifetime JPH0695379B2 (en) | 1987-06-29 | 1987-06-29 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0695379B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4947980A (en) * | 1989-03-02 | 1990-08-14 | American Telephone And Telegraph Company | Method and apparatus for stopping and clamping substrates |
-
1987
- 1987-06-29 JP JP16183887A patent/JPH0695379B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4947980A (en) * | 1989-03-02 | 1990-08-14 | American Telephone And Telegraph Company | Method and apparatus for stopping and clamping substrates |
Also Published As
Publication number | Publication date |
---|---|
JPH0695379B2 (en) | 1994-11-24 |
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