JPS5494308A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPS5494308A JPS5494308A JP96378A JP96378A JPS5494308A JP S5494308 A JPS5494308 A JP S5494308A JP 96378 A JP96378 A JP 96378A JP 96378 A JP96378 A JP 96378A JP S5494308 A JPS5494308 A JP S5494308A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- alkyl ether
- ether phosphate
- polyoxyethylene alkyl
- formula
- 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)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To increase dispersibility and improve surface electric resistance by adding a specific dispersant at the time of preparing magnetic coating with magnetic powder having adsorbed phosphoric ester on surfaces.
CONSTITUTION: Magnetic powder is dipped in an aqueous solution of polyoxyethylene alkyl ether phosphate or polyoxyethylene alkyl ether phosphate being monoester type of formula I or diester type of formula II, and the solution is filtered and dries. Next, the binder comprising adding alkyl benzene sulfonic acid or polyoxyethylene alkyl ether phosphate of 0.1 to 3pts.wt. based to 100pts.wt. of magnetic powder and the abovementioned magnetic powder are mixed and the resultant magnetic coating is coated on a substrate.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP96378A JPS5494308A (en) | 1978-01-09 | 1978-01-09 | Production of magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP96378A JPS5494308A (en) | 1978-01-09 | 1978-01-09 | Production of magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5494308A true JPS5494308A (en) | 1979-07-26 |
JPS5744970B2 JPS5744970B2 (en) | 1982-09-25 |
Family
ID=11488290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP96378A Granted JPS5494308A (en) | 1978-01-09 | 1978-01-09 | Production of magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5494308A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5649769A (en) * | 1979-09-29 | 1981-05-06 | Dainippon Printing Co Ltd | Surface treatment of ferromagnetic powder for magnetic ink |
JPS57152535A (en) * | 1981-03-18 | 1982-09-20 | Hitachi Maxell Ltd | Magnetic recording medium |
JPS57152536A (en) * | 1981-03-18 | 1982-09-20 | Hitachi Maxell Ltd | Magnetic recording medium |
JPH041917A (en) * | 1990-04-19 | 1992-01-07 | Fuji Photo Film Co Ltd | Magnetic recording medium and its production |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5837955U (en) * | 1981-09-04 | 1983-03-11 | 三菱自動車工業株式会社 | Cyclone air cleaner |
-
1978
- 1978-01-09 JP JP96378A patent/JPS5494308A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5649769A (en) * | 1979-09-29 | 1981-05-06 | Dainippon Printing Co Ltd | Surface treatment of ferromagnetic powder for magnetic ink |
JPS57152535A (en) * | 1981-03-18 | 1982-09-20 | Hitachi Maxell Ltd | Magnetic recording medium |
JPS57152536A (en) * | 1981-03-18 | 1982-09-20 | Hitachi Maxell Ltd | Magnetic recording medium |
JPH0341891B2 (en) * | 1981-03-18 | 1991-06-25 | ||
JPH0427609B2 (en) * | 1981-03-18 | 1992-05-12 | Hitachi Maxell | |
JPH041917A (en) * | 1990-04-19 | 1992-01-07 | Fuji Photo Film Co Ltd | Magnetic recording medium and its production |
Also Published As
Publication number | Publication date |
---|---|
JPS5744970B2 (en) | 1982-09-25 |
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