JPS57138050A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS57138050A JPS57138050A JP2449181A JP2449181A JPS57138050A JP S57138050 A JPS57138050 A JP S57138050A JP 2449181 A JP2449181 A JP 2449181A JP 2449181 A JP2449181 A JP 2449181A JP S57138050 A JPS57138050 A JP S57138050A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- polystylene
- sulfonic acid
- powder
- radical
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve scattering perfrmance of magnetic powder, by using polystylene or stylene copolymer including sulfonic acid radical or metallic sulfonate radical as a binder component for magnetic layers. CONSTITUTION:Polystylene or stylen copolymer introduced with sulfonic acid radical or metallic sulfonate radical is used as binding component of magnetic layers. For example, a magnetic paint having the composition of 100pts. gamma-Fe2O3 powder, 4pts. alpha-Fe2O3 powder, 2pts. carbon black, 22pts. partially sulfonated polystylene (0.05-3mol% of sulfonic acid content), 65pts. methyl isobutyl ketone, and 65pts. toluene, is coated on a polyester film, dried and a magnetic layer, 5mu thick is made. Thus, the scattering perfrmance of magnetic powder is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2449181A JPS57138050A (en) | 1981-02-20 | 1981-02-20 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2449181A JPS57138050A (en) | 1981-02-20 | 1981-02-20 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57138050A true JPS57138050A (en) | 1982-08-26 |
JPH0318248B2 JPH0318248B2 (en) | 1991-03-12 |
Family
ID=12139647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2449181A Granted JPS57138050A (en) | 1981-02-20 | 1981-02-20 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57138050A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001019555A1 (en) * | 1999-09-16 | 2001-03-22 | Kemet Electronics Corporation | Process for producing powder metallurgy compacts free from binder contamination and compacts produced thereby |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54151417A (en) * | 1978-05-19 | 1979-11-28 | Toyo Boseki | Magnetic recording medium |
-
1981
- 1981-02-20 JP JP2449181A patent/JPS57138050A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54151417A (en) * | 1978-05-19 | 1979-11-28 | Toyo Boseki | Magnetic recording medium |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001019555A1 (en) * | 1999-09-16 | 2001-03-22 | Kemet Electronics Corporation | Process for producing powder metallurgy compacts free from binder contamination and compacts produced thereby |
US6315808B1 (en) | 1999-09-16 | 2001-11-13 | Kemet Electronics Corporation | Process for producing powder metallurgy compacts free from binder contamination and compacts produced thereby |
US6375710B2 (en) | 1999-09-16 | 2002-04-23 | Kemet Electronics Corporation | Process for producing powder metallurgy compacts free from binder contamination and compacts produced thereby |
GB2368850A (en) * | 1999-09-16 | 2002-05-15 | Kemet Electronics Corp | Process for producing powder metallurgy compacts free from binder contamination and compacts produced thereby |
Also Published As
Publication number | Publication date |
---|---|
JPH0318248B2 (en) | 1991-03-12 |
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