JPS5649769A - Surface treatment of ferromagnetic powder for magnetic ink - Google Patents
Surface treatment of ferromagnetic powder for magnetic inkInfo
- Publication number
- JPS5649769A JPS5649769A JP12591479A JP12591479A JPS5649769A JP S5649769 A JPS5649769 A JP S5649769A JP 12591479 A JP12591479 A JP 12591479A JP 12591479 A JP12591479 A JP 12591479A JP S5649769 A JPS5649769 A JP S5649769A
- Authority
- JP
- Japan
- Prior art keywords
- ferromagnetic powder
- organic solvent
- magnetic ink
- treated
- surface treatment
- 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
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
PURPOSE: To obtain a ferromagnetic powder giving a magnetic ink, excellent in coat properties, magnetic characteristics and ink suitability, by dispersing a ferromagnetic powder, surface-treated with a polyoxyethylene alkyl (aryl) ether phosphate, in an organic solvent.
CONSTITUTION: A ferromagnetic powder is surface-treated with a polyoxyethylene alkyl(aryl)ether phosphate of formula I or II (wherein R is 8W30C alkyl or alkylaryl; n and m are 2W15), in a treating medium containing 5wt% or more of a highly polar hydrophilic organic solvent of ≥4 dielectric constant at 20°C and ≥50g solubility in 100g water. Then the surface-treated ferromagnetic powder is dispersed in an organic solvent, together with a binder and a necessary additive, to prepare a magnetic ink. The highly polar hydrophilic organic solvent is ethylene chlorohydrin, methyl alcohol, ethylene glycol, etc.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12591479A JPS5649769A (en) | 1979-09-29 | 1979-09-29 | Surface treatment of ferromagnetic powder for magnetic ink |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12591479A JPS5649769A (en) | 1979-09-29 | 1979-09-29 | Surface treatment of ferromagnetic powder for magnetic ink |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5649769A true JPS5649769A (en) | 1981-05-06 |
Family
ID=14922041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12591479A Pending JPS5649769A (en) | 1979-09-29 | 1979-09-29 | Surface treatment of ferromagnetic powder for magnetic ink |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5649769A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100790856B1 (en) * | 2005-07-15 | 2008-01-03 | 삼성전기주식회사 | Multi layer ceramic capacitor comprising phosphates dispersant |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5494308A (en) * | 1978-01-09 | 1979-07-26 | Tdk Corp | Production of magnetic recording medium |
-
1979
- 1979-09-29 JP JP12591479A patent/JPS5649769A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5494308A (en) * | 1978-01-09 | 1979-07-26 | Tdk Corp | Production of magnetic recording medium |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100790856B1 (en) * | 2005-07-15 | 2008-01-03 | 삼성전기주식회사 | Multi layer ceramic capacitor comprising phosphates dispersant |
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