发明名称 |
POLYCARBONATE FOR DISK SUBSTRATE |
摘要 |
PROBLEM TO BE SOLVED: To provide a high-quality polycarbonate which has good adhesion property with a recording film and does not corrode the recording film when the polycarbonate is used for a disk substrate such as an optical disk and a magnetic disk, and which causes no corrosion of the molding die when the polycarbonate is molded, and thereby, which results in a long life of a stamper. SOLUTION: This polycarbonate for a disk substrate is produced by an interfacial polymn. condensation method from bisphenols and phosgene as the source materials in a solvent of methylene chloride. The contents of impurities are <2 wt.% of the low mol.wt. component by Soxhlet extraction in an acetone solvent, <=20 ppm unreacted bisphenols and <=20 ppm methylene chloride. |
申请公布号 |
JP2000222774(A) |
申请公布日期 |
2000.08.11 |
申请号 |
JP20000015361 |
申请日期 |
2000.01.25 |
申请人 |
IDEMITSU PETROCHEM CO LTD |
发明人 |
OTSUBO KAZUNARI;EZOE MOTONOBU;AGO HIDEO |
分类号 |
G11B5/73;C08G64/00;C08G64/06;G11B7/24;G11B7/253;G11B11/105 |
主分类号 |
G11B5/73 |
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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