JPS6478421A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6478421A JPS6478421A JP23592987A JP23592987A JPS6478421A JP S6478421 A JPS6478421 A JP S6478421A JP 23592987 A JP23592987 A JP 23592987A JP 23592987 A JP23592987 A JP 23592987A JP S6478421 A JPS6478421 A JP S6478421A
- Authority
- JP
- Japan
- Prior art keywords
- polyurethane resin
- arom
- durability
- conjunction
- polyester polyol
- 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 durability by using a polyurethane resin formed by using arom. polyester polyol as a polyol component as a binder component and using magnetic powder and alumina powder in conjunction therewith. CONSTITUTION:The polyurethane resin to be used as the binder component is the polyurethane resin formed by using the arom. polyester polyol as the polyol component, for which the arom. polyester polyol contg. at least one kind among acid components such as sodium 5-sulfoisophthalate and isophthalic acid and alcohol components such as 1,4-butandiol and ethylene glycol is used. Since such polyurethane resin has good affinity to the magnetic powder, the resin improves the dispersibility of the extremely fine magnetic powder and sufficiently intensifies the coated film strength of the magnetic layer, thereby improving the durability thereof. The alumina powder to be used in conjunction with the polyurethane resin has preferably >=3.0m<2>/g BET specific surface area. The durability is additionally improved if such alumina powder is used in conjunction with the resin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23592987A JPS6478421A (en) | 1987-09-18 | 1987-09-18 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23592987A JPS6478421A (en) | 1987-09-18 | 1987-09-18 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6478421A true JPS6478421A (en) | 1989-03-23 |
Family
ID=16993326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23592987A Pending JPS6478421A (en) | 1987-09-18 | 1987-09-18 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6478421A (en) |
-
1987
- 1987-09-18 JP JP23592987A patent/JPS6478421A/en active Pending
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