JPS57165464A - Composition for magnetic coating - Google Patents
Composition for magnetic coatingInfo
- Publication number
- JPS57165464A JPS57165464A JP5099981A JP5099981A JPS57165464A JP S57165464 A JPS57165464 A JP S57165464A JP 5099981 A JP5099981 A JP 5099981A JP 5099981 A JP5099981 A JP 5099981A JP S57165464 A JPS57165464 A JP S57165464A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- group
- polyisocyanate
- organic solvent
- sulfonic acid
- 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
- Paints Or Removers (AREA)
Abstract
PURPOSE: To prepare the titled composition having excellent magnetic properties, adhesivity to polyester films, and storage stability, by compounding a polyurethane resin containing a specific amount of sulfonic acid metal salt group, fine magnetic particles, and an organic solvent having a specific boiling point, at specific ratios.
CONSTITUTION: The objective composition is prepared e.g. by mixing (A) 1W 27wt% polyurethane resin containing 4.0W9.9 equivalent of sulfonic acid metal salt group per 106g of polymer (preferably resin having a molecular weight of 8,000W 100,000 and obtained from a polyisocyanate and a polyhydroxy compound wherein the ratio of the NCO group in the polyisocyanate to the OH group in the polyhydroxy compound is 0.5W2/1) with (B) 12W57% magnetic fine powder (e.g. γ-Fe2O3 having spinel structure, etc.), (C) 40W80% organic solvent having a boiling point of 50W170°C, and if necessary, (D) 2W100pts., based on 100pts. of the component (A), of an isocyanate compound, etc.
USE: High-performance magnetic tape or sheet.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5099981A JPS57165464A (en) | 1981-04-03 | 1981-04-03 | Composition for magnetic coating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5099981A JPS57165464A (en) | 1981-04-03 | 1981-04-03 | Composition for magnetic coating |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57165464A true JPS57165464A (en) | 1982-10-12 |
Family
ID=12874480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5099981A Pending JPS57165464A (en) | 1981-04-03 | 1981-04-03 | Composition for magnetic coating |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57165464A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4666784A (en) * | 1985-07-26 | 1987-05-19 | Toyo Boseki Kabushiki Kaisha | Magnetic recording medium |
JPS62184621A (en) * | 1986-02-08 | 1987-08-13 | Toyobo Co Ltd | Magnetic recording medium |
JPS62246130A (en) * | 1986-04-18 | 1987-10-27 | Fuji Photo Film Co Ltd | Magnetic recording medium |
JPH01115920A (en) * | 1987-10-29 | 1989-05-09 | Mitsubishi Kasei Corp | Polyurethane resin for magnetic recording medium |
JPH0490599U (en) * | 1990-12-21 | 1992-08-06 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54157603A (en) * | 1978-06-01 | 1979-12-12 | Toyo Boseki | Magnetic recording medium |
-
1981
- 1981-04-03 JP JP5099981A patent/JPS57165464A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54157603A (en) * | 1978-06-01 | 1979-12-12 | Toyo Boseki | Magnetic recording medium |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4666784A (en) * | 1985-07-26 | 1987-05-19 | Toyo Boseki Kabushiki Kaisha | Magnetic recording medium |
JPS62184621A (en) * | 1986-02-08 | 1987-08-13 | Toyobo Co Ltd | Magnetic recording medium |
JPH0682456B2 (en) * | 1986-02-08 | 1994-10-19 | 東洋紡績株式会社 | Magnetic recording medium |
JPS62246130A (en) * | 1986-04-18 | 1987-10-27 | Fuji Photo Film Co Ltd | Magnetic recording medium |
JPH01115920A (en) * | 1987-10-29 | 1989-05-09 | Mitsubishi Kasei Corp | Polyurethane resin for magnetic recording medium |
JPH0490599U (en) * | 1990-12-21 | 1992-08-06 |
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