JPS57123208A - Copolymer for optical information-recording carrier - Google Patents
Copolymer for optical information-recording carrierInfo
- Publication number
- JPS57123208A JPS57123208A JP55115649A JP11564980A JPS57123208A JP S57123208 A JPS57123208 A JP S57123208A JP 55115649 A JP55115649 A JP 55115649A JP 11564980 A JP11564980 A JP 11564980A JP S57123208 A JPS57123208 A JP S57123208A
- Authority
- JP
- Japan
- Prior art keywords
- copolymer
- optical information
- recording carrier
- ethyl acrylate
- prepared
- 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
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Magnetic Record Carriers (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE: The titled copolymer excellent in strength, heat resistance, moldability, optical properties, and suitable for video discs, prepared by copolymerizing methyl methacrylate with ethyl acrylate under conditions capable of providing a specified composition and intrinsic viscosity.
CONSTITUTION: In the production of a copolymer by copolymerizing methyl methacrylate with ethyl acrylate, the purpose copolymer for optical information- recording carriers is prepared by carrying out the copolymerization under conditions capable of providing a copolymer satisfying relationshipsI, II and III, wherein X is a percentage of ethyl acrylate in the resulting copolymer and y is an intrinsic viscosity in chloroform at 20°C. The preferred polymerization methods include bulk polymerization and suspension polymerization. The production of an optical information-recording carrier by use of the catalyst can be performed by pressing the copolymer against a base disc of an information-recording carrier at about 150W280°C.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55115649A JPS6045649B2 (en) | 1980-08-22 | 1980-08-22 | Copolymer for optical information recording carrier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55115649A JPS6045649B2 (en) | 1980-08-22 | 1980-08-22 | Copolymer for optical information recording carrier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57123208A true JPS57123208A (en) | 1982-07-31 |
JPS6045649B2 JPS6045649B2 (en) | 1985-10-11 |
Family
ID=14667860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55115649A Expired JPS6045649B2 (en) | 1980-08-22 | 1980-08-22 | Copolymer for optical information recording carrier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6045649B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586539A (en) * | 1981-07-03 | 1983-01-14 | Asahi Chem Ind Co Ltd | Video disc formed with use of specific polymethyl methacryl resin |
JPS5996544A (en) * | 1982-11-24 | 1984-06-04 | Sony Corp | Optical information recording medium |
EP0218256A2 (en) * | 1985-10-11 | 1987-04-15 | Mitsubishi Rayon Co., Ltd. | Methacrylic resin composition for optical discs |
US5080945A (en) * | 1982-12-30 | 1992-01-14 | Daicel Chemical Industries, Ltd. | Large-capacity-memory disk |
US5252440A (en) * | 1985-10-11 | 1993-10-12 | Mitsubishi Rayon Co., Ltd. | Methacrylic resin composition for optical discs |
US5510408A (en) * | 1993-05-31 | 1996-04-23 | Kuraray Co., Ltd. | Methacrylic resin composition and method for production thereof |
-
1980
- 1980-08-22 JP JP55115649A patent/JPS6045649B2/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS586539A (en) * | 1981-07-03 | 1983-01-14 | Asahi Chem Ind Co Ltd | Video disc formed with use of specific polymethyl methacryl resin |
JPS5996544A (en) * | 1982-11-24 | 1984-06-04 | Sony Corp | Optical information recording medium |
JPH0413777B2 (en) * | 1982-11-24 | 1992-03-10 | Sony Corp | |
US5080945A (en) * | 1982-12-30 | 1992-01-14 | Daicel Chemical Industries, Ltd. | Large-capacity-memory disk |
EP0218256A2 (en) * | 1985-10-11 | 1987-04-15 | Mitsubishi Rayon Co., Ltd. | Methacrylic resin composition for optical discs |
US5252440A (en) * | 1985-10-11 | 1993-10-12 | Mitsubishi Rayon Co., Ltd. | Methacrylic resin composition for optical discs |
US5510408A (en) * | 1993-05-31 | 1996-04-23 | Kuraray Co., Ltd. | Methacrylic resin composition and method for production thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS6045649B2 (en) | 1985-10-11 |
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