JPS56101635A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS56101635A JPS56101635A JP472080A JP472080A JPS56101635A JP S56101635 A JPS56101635 A JP S56101635A JP 472080 A JP472080 A JP 472080A JP 472080 A JP472080 A JP 472080A JP S56101635 A JPS56101635 A JP S56101635A
- Authority
- JP
- Japan
- Prior art keywords
- binder
- plasticizer
- epoxy
- magnetic layer
- molecular weight
- 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
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
- G11B5/7022—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 containing mixtures of polyurethanes or polyisocyanates with other polymers
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve the dispersibility, wear resistance and heat resistance of magnetic powder, by forming a magnetic layer by using a binder which contains a specific ternary copolymer, either polyester type or epoxy plasticizer and trifunctional low-molecular weight isocyanate. CONSTITUTION:A ternary copolymer of 200-600 polymerization degree consisting of 70-80wt% vinyl chloride, 1-25wt% vinyl propionate and 5-20wt% vinyl alcohol, and one kind of a polyester plasticizer (of 600-8,000 molecular weight with alkyl group at both terminals which is obtained from an adipic acid, phthalic acid, etc., and glycol) or epoxy plasticizer (having epoxy group in a molecule) such as epoxidized soybean oil by 5-50wt% to the said copolymer, and further, trifunctional low-molecular-weight isocyanate by 3-50wt% to the whole binder are mixed into the binder, which is used to form a magnetic layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP472080A JPS56101635A (en) | 1980-01-19 | 1980-01-19 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP472080A JPS56101635A (en) | 1980-01-19 | 1980-01-19 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56101635A true JPS56101635A (en) | 1981-08-14 |
Family
ID=11591713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP472080A Pending JPS56101635A (en) | 1980-01-19 | 1980-01-19 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56101635A (en) |
-
1980
- 1980-01-19 JP JP472080A patent/JPS56101635A/en active Pending
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