JPS5473005A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5473005A JPS5473005A JP13968377A JP13968377A JPS5473005A JP S5473005 A JPS5473005 A JP S5473005A JP 13968377 A JP13968377 A JP 13968377A JP 13968377 A JP13968377 A JP 13968377A JP S5473005 A JPS5473005 A JP S5473005A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- magnetic recording
- molecular weight
- polymer
- copolymer
- 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
- Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
Abstract
PURPOSE: To improve surface smoothness, abrasion resistance, running characteristic, etc. of a magnetic recording medium by forming the magnetic recording medium with the graft polymer of a linear polymer having hydroxyl groups and a polymer of a specific molecular weight having isocyanate groups as a binder.
CONSTITUTION: A linear polymer such as the copolymer of vinyl chloride, vinyl acetate, vinylidene chloride, etc. of about 20,000 to 50,000 in mean molecular weight and about 60°C or higher in glass transition temperature having one or more (preferafbly more then 3) reactive hydroxyl groups in the main chain and polyvinyl alcohol (where vinyl alcohol is less than 10mole%) and a plymer of 2000 to 20000 in mean molecular weight having one or two reactive isocyanate groups are caus ed to react to a graft copolymer, which is then used as a binder for magnetic powder in producing the magnetic recording medium. The glass transition temperature of the abovementioned copolymer is desirably more than 30°C.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13968377A JPS5473005A (en) | 1977-11-21 | 1977-11-21 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13968377A JPS5473005A (en) | 1977-11-21 | 1977-11-21 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5473005A true JPS5473005A (en) | 1979-06-12 |
Family
ID=15250988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13968377A Pending JPS5473005A (en) | 1977-11-21 | 1977-11-21 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5473005A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5898833A (en) * | 1981-12-07 | 1983-06-11 | Fuji Photo Film Co Ltd | Magnetic recording material |
JP2011216157A (en) * | 2010-03-31 | 2011-10-27 | Fujifilm Corp | Binder for magnetic recording medium, composition for magnetic recording medium, and magnetic recording medium |
-
1977
- 1977-11-21 JP JP13968377A patent/JPS5473005A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5898833A (en) * | 1981-12-07 | 1983-06-11 | Fuji Photo Film Co Ltd | Magnetic recording material |
JPH0421928B2 (en) * | 1981-12-07 | 1992-04-14 | Fuji Photo Film Co Ltd | |
JP2011216157A (en) * | 2010-03-31 | 2011-10-27 | Fujifilm Corp | Binder for magnetic recording medium, composition for magnetic recording medium, and magnetic recording medium |
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