JPS6487624A - Polycarbonate copolymer - Google Patents
Polycarbonate copolymerInfo
- Publication number
- JPS6487624A JPS6487624A JP62242474A JP24247487A JPS6487624A JP S6487624 A JPS6487624 A JP S6487624A JP 62242474 A JP62242474 A JP 62242474A JP 24247487 A JP24247487 A JP 24247487A JP S6487624 A JPS6487624 A JP S6487624A
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- copolymer
- recurring units
- units expressed
- polycarbonate copolymer
- 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
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
- G11B7/2534—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polycarbonates [PC]
Abstract
PURPOSE:To obtain the titled copolymer for optical information recording and disc, consisting of specific two kind of recurring units, having excellent heat resistance and transparency and capable of recording signals by laser beam or carrying out readout of signals recorded by reflection and permeation of laser beam. CONSTITUTION:The aimed copolymer having recurring units expressed by formula I and II, molar ratio of units expressed by formulas I and II of 1:99-99:1 and preferably 13,000-50,000 viscometric average molecular weight and obtained by subjecting 99-1mol.% 1,1-bis(4-hydroxy-3-tert.-butylphenyl)cyclohexane to carbonate binding with 1-99mol.% bisphenol AP.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242474A JP2565719B2 (en) | 1987-09-29 | 1987-09-29 | Polycarbonate copolymer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62242474A JP2565719B2 (en) | 1987-09-29 | 1987-09-29 | Polycarbonate copolymer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6487624A true JPS6487624A (en) | 1989-03-31 |
JP2565719B2 JP2565719B2 (en) | 1996-12-18 |
Family
ID=17089623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62242474A Expired - Lifetime JP2565719B2 (en) | 1987-09-29 | 1987-09-29 | Polycarbonate copolymer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2565719B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009080424A (en) * | 2007-09-27 | 2009-04-16 | Teijin Chem Ltd | Optical member |
-
1987
- 1987-09-29 JP JP62242474A patent/JP2565719B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009080424A (en) * | 2007-09-27 | 2009-04-16 | Teijin Chem Ltd | Optical member |
Also Published As
Publication number | Publication date |
---|---|
JP2565719B2 (en) | 1996-12-18 |
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