JPS57158016A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS57158016A JPS57158016A JP4148381A JP4148381A JPS57158016A JP S57158016 A JPS57158016 A JP S57158016A JP 4148381 A JP4148381 A JP 4148381A JP 4148381 A JP4148381 A JP 4148381A JP S57158016 A JPS57158016 A JP S57158016A
- Authority
- JP
- Japan
- Prior art keywords
- tdi
- tolylenediisocyanate
- polyurethane elastomer
- component
- isocyanate component
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
- G11B5/7021—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing a polyurethane or a polyisocyanate
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve the dispersibility and durability of magnetic powder by adding polyurethane elastomer which uses TDI as an isocyanate component and has mean molecular weight within a specific range to a binder for a magnetic layer. CONSTITUTION:A binder for a magnetic layer contains polyurethane elastomer which uses tolylenediisocyanate (TDI) as an isocyanate component and has >=10,000 mean molecular weight. In this case, said polyurethane elastomer is obtained through the condensation polymerization of a polyol component and TDI as the isocyanate component in the usual way, and as the polyol component, a polyester polyol component of polyhydric alcohol such as 1.4-butanediol, etc., and polybasic acid such as adipic acid, various polyether polyol components, etc., are usable. As TDI, either of 2.4-tolylenediisocyanate and 2.6-tolylenediisocyanate and may be used.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4148381A JPS57158016A (en) | 1981-03-20 | 1981-03-20 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4148381A JPS57158016A (en) | 1981-03-20 | 1981-03-20 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57158016A true JPS57158016A (en) | 1982-09-29 |
JPH0370286B2 JPH0370286B2 (en) | 1991-11-07 |
Family
ID=12609587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4148381A Granted JPS57158016A (en) | 1981-03-20 | 1981-03-20 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57158016A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53128306A (en) * | 1977-04-14 | 1978-11-09 | Sony Corp | Magnetic recording medium |
JPS5468206A (en) * | 1977-11-10 | 1979-06-01 | Sony Corp | Magnetic recording medium |
JPS54107710A (en) * | 1978-02-10 | 1979-08-23 | Victor Co Of Japan Ltd | Magnetic recording binder |
JPS5538693A (en) * | 1978-09-13 | 1980-03-18 | Toyo Tire & Rubber Co Ltd | Magnetic recording medium |
-
1981
- 1981-03-20 JP JP4148381A patent/JPS57158016A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53128306A (en) * | 1977-04-14 | 1978-11-09 | Sony Corp | Magnetic recording medium |
JPS5468206A (en) * | 1977-11-10 | 1979-06-01 | Sony Corp | Magnetic recording medium |
JPS54107710A (en) * | 1978-02-10 | 1979-08-23 | Victor Co Of Japan Ltd | Magnetic recording binder |
JPS5538693A (en) * | 1978-09-13 | 1980-03-18 | Toyo Tire & Rubber Co Ltd | Magnetic recording medium |
Also Published As
Publication number | Publication date |
---|---|
JPH0370286B2 (en) | 1991-11-07 |
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