发明名称 |
Polycarbonate and process for producing the same |
摘要 |
A polycarbonate having desirable color tone or transparency, as well as desirable heat resistance and water resistance, in which the amounts of residual metals in the polycarbonate are 10 ppm or less in total of Fe, Cr and Mo and 50 ppm or less in total of Ni and Cr. The polycarbonate is obtained by transesterification of (A) a dihydroxy compound and (B) a carbonic diester in a reactor made of a metallic material containing at least one metal selected from the group consisting of Fe, Cr, Mo, Ni and Cu, and controlling the water content in the reactor to 500 ppm or less.
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申请公布号 |
US5349043(A) |
申请公布日期 |
1994.09.20 |
申请号 |
US19930069598 |
申请日期 |
1993.06.01 |
申请人 |
IDEMITSU PETROCHEMICAL CO., LTD. |
发明人 |
KUZE, SHIGEKI;OKUMURA, RYOZO;KUNISHI, NORIYUKI |
分类号 |
C08G64/20;C08G64/30;(IPC1-7):C08G64/00 |
主分类号 |
C08G64/20 |
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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