发明名称 |
Polycarbonate resin, optical-information recording medium substrate made of the same, and optical-information recording medium |
摘要 |
A polycarbonate resin having an improved hue is provided, which is suitable for use as a substrate for transfer type optical recording media such as optical disks.The polycarbonate resin is one obtained by reacting starting materials comprising a dihydric phenol, a carbonate material, and a chain terminator comprising a p-(long chain)-substituted phenol (hereinafter referred to as a para isomer), characterized in that the amount of an o-(long chain)-substituted phenol (hereinafter referred to as an ortho isomer) contained as an impurity in the chain terminator used satisfies the following relationship:(wherein "number of C's" represents the number of carbon atoms in the substituent organic group of the substituted phenols).
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申请公布号 |
US6294641(B1) |
申请公布日期 |
2001.09.25 |
申请号 |
US19990381278 |
申请日期 |
1999.09.20 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
MIYAMOTO MASAAKI;UEDA MOTONORI;KUMA KIYOJI;UCHIMURA RYUJI;SHIRAISHI YOSHITAKA |
分类号 |
C08G64/14;G11B7/253;G11B7/2534;(IPC1-7):C08G64/00 |
主分类号 |
C08G64/14 |
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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