发明名称 |
Optical disk substrate, optical disk and aromatic polycarbonate resin |
摘要 |
<p>An optical disk substrate formed substantially of an aromatic polycarbonate from an aromatic dihydroxy component containing at least 20 mol% of 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, wherein: (A) the aromatic polycarbonate has a specific viscosity of 0.2 to 0.5, (B) the aromatic polycarbonate shows a water absorption percentage of 0.2 % by weight or less, (C) the aromatic polycarbonate has an oligomer content of 10 % or less, and (D) the number of undissolved particles having a diameter of 0.5 mu m or greater is 25,000 pieces or less per g of the polycarbonate resin, and the number of undissolved particles having a diameter of 1 mu m or greater is 500 pieces or less per g of the polycarbonate resin, and an optical disk from the above substrate.</p> |
申请公布号 |
EP0691361(A2) |
申请公布日期 |
1996.01.10 |
申请号 |
EP19950304209 |
申请日期 |
1995.06.16 |
申请人 |
TEIJIN CHEMICALS, LTD. |
发明人 |
TOKUDA, TOSHIMASA, C/O TEIJIN CHEMICALS LTD.;HAYASHI, KUNIYUKI, C/O TEIJIN CHEMICALS LTD.;HORIE, TATSUMI, C/O TEIJIN CHEMICALS LTD. |
分类号 |
C08G64/06;C08G64/14;G11B7/2534;G11B7/258;G11B7/2585;(IPC1-7):C08G64/06;G11B7/24 |
主分类号 |
C08G64/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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