JPS5665337A - Surface treating method of ferromagnetic powder for magnetic ink - Google Patents
Surface treating method of ferromagnetic powder for magnetic inkInfo
- Publication number
- JPS5665337A JPS5665337A JP13758479A JP13758479A JPS5665337A JP S5665337 A JPS5665337 A JP S5665337A JP 13758479 A JP13758479 A JP 13758479A JP 13758479 A JP13758479 A JP 13758479A JP S5665337 A JPS5665337 A JP S5665337A
- Authority
- JP
- Japan
- Prior art keywords
- ferromagnetic powder
- treating
- magnetic ink
- treating agent
- medium
- 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)
- Magnetic Record Carriers (AREA)
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Paints Or Removers (AREA)
Abstract
PURPOSE: To improve a square ratio, wear resistance and secular stability by using specific dialkylsulfosuccinate as a treating agent and by treating ferromagnetic powder in a medium including a high-polar hydrophilic organic solvent having more than specific values of dielectric constant and solubility to water.
CONSTITUTION: As a treating agent, 0.5W10wt% dialkylsulfosuccinate expressed by the equation [R1 and R2 for CnH2n+1, (n) for 5W20, and M for Na and K] is used for ferromagnetic powder. This and a high-polar hydrophilic organic solvent (methanol, glycol, etc.) of four or more in dielectric constant and 50g or more in solubility to 100g water at 20°C are included in a treating medium by 5% or more. For example, ferromagnetic powder is kneaded in a solution obtained by adding the above-mentioned treating agent and high-polar solvent to a mixture of methyl ethyl ketone and toluene equal in weight as the treating medium and then additives for magnetic ink such as a binder, lubricant are added to manufacture magnetic ink.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13758479A JPS5665337A (en) | 1979-10-26 | 1979-10-26 | Surface treating method of ferromagnetic powder for magnetic ink |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13758479A JPS5665337A (en) | 1979-10-26 | 1979-10-26 | Surface treating method of ferromagnetic powder for magnetic ink |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5665337A true JPS5665337A (en) | 1981-06-03 |
Family
ID=15202123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13758479A Pending JPS5665337A (en) | 1979-10-26 | 1979-10-26 | Surface treating method of ferromagnetic powder for magnetic ink |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5665337A (en) |
-
1979
- 1979-10-26 JP JP13758479A patent/JPS5665337A/en active Pending
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