JPS5515281A - Processing method for magnetic powder - Google Patents
Processing method for magnetic powderInfo
- Publication number
- JPS5515281A JPS5515281A JP8900978A JP8900978A JPS5515281A JP S5515281 A JPS5515281 A JP S5515281A JP 8900978 A JP8900978 A JP 8900978A JP 8900978 A JP8900978 A JP 8900978A JP S5515281 A JPS5515281 A JP S5515281A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- magnetic
- magnetic powder
- mole
- dried
- 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
- 239000006247 magnetic powder Substances 0.000 title abstract 3
- 238000003672 processing method Methods 0.000 title 1
- 239000000178 monomer Substances 0.000 abstract 3
- 239000000843 powder Substances 0.000 abstract 3
- 229920001577 copolymer Polymers 0.000 abstract 2
- -1 metacrylic acid ester Chemical class 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical group CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 abstract 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000012046 mixed solvent Substances 0.000 abstract 1
- 229920006267 polyester film Polymers 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 229920002554 vinyl polymer Polymers 0.000 abstract 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To improve a dispersion property in a binder by adding metacrylic acid ester monomer, acryl system monomer and copolymer starter to a water medium containing a dispersed powder and thereafter by covering the surface of the powder with a copolymer produced by the heating.
CONSTITUTION: 10 part of r-Fe2O3 magnetic powder, two part of monomer composed of 10 mole% of 2-hydroxy ethylmetacrylate, 45 mole% of metacrylic acid methyl and 45mole% of acrylic acid ethyl 0.006 part of sulfite karium and 88 part of water are mixed together, they are caused to react at a temperature of 70°C, thereafter is washed, filtered and dried to be turned to a magnetic powder. Successively, the powder is mixed with vinylchloride-vinyl acetate-vinyl alcohol, methylisobuthyl keton-toluen mixed solvent to prepare a magnetic coat, it is coated on a polyester film to be dried, being calender processed to make a magnetic tape. According to such a process, A tape with a good rectangular rate can be prepared.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8900978A JPS5515281A (en) | 1978-07-20 | 1978-07-20 | Processing method for magnetic powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8900978A JPS5515281A (en) | 1978-07-20 | 1978-07-20 | Processing method for magnetic powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5515281A true JPS5515281A (en) | 1980-02-02 |
Family
ID=13958855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8900978A Pending JPS5515281A (en) | 1978-07-20 | 1978-07-20 | Processing method for magnetic powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5515281A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573224A (en) * | 1980-06-05 | 1982-01-08 | Toshiba Corp | Magnetic recording body |
| US5501903A (en) * | 1994-07-29 | 1996-03-26 | Minnesota Mining And Manufacturing Company | Magnetic recording medium having a binder system including a non halogenated vinyl polymer and a polyurethane polymer each with specified pendant groups |
| US5510187A (en) * | 1993-04-27 | 1996-04-23 | Minnesota Mining And Manufacturing Company | Magnetic recording medium whose magnetic layer incorporates nonhalogenated vinyl copolymer and specified polyurethane polymer |
| US5674604A (en) * | 1995-03-31 | 1997-10-07 | Minnesota Mining And Manufacturing Company | Magnetic recording medium comprising magnetic particles, binder, and a non halogenated vinyl oligomer dispersant |
-
1978
- 1978-07-20 JP JP8900978A patent/JPS5515281A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS573224A (en) * | 1980-06-05 | 1982-01-08 | Toshiba Corp | Magnetic recording body |
| US5510187A (en) * | 1993-04-27 | 1996-04-23 | Minnesota Mining And Manufacturing Company | Magnetic recording medium whose magnetic layer incorporates nonhalogenated vinyl copolymer and specified polyurethane polymer |
| US5501903A (en) * | 1994-07-29 | 1996-03-26 | Minnesota Mining And Manufacturing Company | Magnetic recording medium having a binder system including a non halogenated vinyl polymer and a polyurethane polymer each with specified pendant groups |
| US5712345A (en) * | 1994-07-29 | 1998-01-27 | Minnesota Mining And Manufacturing Company | Binder system for magnetic media |
| US5674604A (en) * | 1995-03-31 | 1997-10-07 | Minnesota Mining And Manufacturing Company | Magnetic recording medium comprising magnetic particles, binder, and a non halogenated vinyl oligomer dispersant |
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