JPS6484420A - Disk-shaped magnetic recording medium - Google Patents
Disk-shaped magnetic recording mediumInfo
- Publication number
- JPS6484420A JPS6484420A JP62241908A JP24190887A JPS6484420A JP S6484420 A JPS6484420 A JP S6484420A JP 62241908 A JP62241908 A JP 62241908A JP 24190887 A JP24190887 A JP 24190887A JP S6484420 A JPS6484420 A JP S6484420A
- Authority
- JP
- Japan
- Prior art keywords
- carbon black
- resin
- group
- contg
- intermediate 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.)
- Granted
Links
Landscapes
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve magnetic characteristic and durability by coating a mag netic coating compd. consisting of ferromagnetic material particles and a binder resin soln. contg. a specific resin on a prescribed substrate or a nonmagnetic substrate via a prescribed intermediate layer. CONSTITUTION:The coating compd. prepd. by dispersing and kneading the ferromagnetic material particles into the binder resin soln. contg. the vinyl chloride resin having acidic groups (including salts), epoxy group and hydroxyl group and the ferromagnetic material particles is coated on the nonmagnetic substrate which is kneaded with a carbon black or has the carbon black as the intermediate layer to form the disk-shaped recording medium. The acidic groups of the above-mentioned resin are preferably a sulfo group, phospho group and carboxy group and the metals forming the salts with said acids are preferably Li, K and Na. The amt. of the resin to be used is preferably 5-25wt.%, more particularly preferably 10-25wt.% of the weight of the ferro magnetic powder. The carbon black is kneaded with the base consisting of polyethylene terephthalate, etc., or the intermediate layer contg. the carbon black is provided between the base and the magnetic layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241908A JP2564145B2 (en) | 1987-09-25 | 1987-09-25 | Disk-shaped magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62241908A JP2564145B2 (en) | 1987-09-25 | 1987-09-25 | Disk-shaped magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6484420A true JPS6484420A (en) | 1989-03-29 |
JP2564145B2 JP2564145B2 (en) | 1996-12-18 |
Family
ID=17081338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62241908A Expired - Fee Related JP2564145B2 (en) | 1987-09-25 | 1987-09-25 | Disk-shaped magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2564145B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61248223A (en) * | 1985-04-25 | 1986-11-05 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS62241906A (en) * | 1986-04-14 | 1987-10-22 | Tosoh Corp | Fluorine-containing polymer |
-
1987
- 1987-09-25 JP JP62241908A patent/JP2564145B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61248223A (en) * | 1985-04-25 | 1986-11-05 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS62241906A (en) * | 1986-04-14 | 1987-10-22 | Tosoh Corp | Fluorine-containing polymer |
Also Published As
Publication number | Publication date |
---|---|
JP2564145B2 (en) | 1996-12-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
LAPS | Cancellation because of no payment of annual fees |