发明名称 |
CARBONIC DIESTER, AROMATIC POLYCARBONATE, PRODUCTION APPARATUS, AND PROCESS FOR PRODUCTION |
摘要 |
Aromatic polycarbonate having a reduced discoloration and improved heat stability, hue, etc. is provided by keeping a pressure in a raw material melting vessel and the linear velocity of a gas in a transporting piping in a specific range, keeping the concentration of a nitrogen-containing basic compound in a specific range, recycling a byproduct containing specific amounts of impurities, suppressing the amounts of a nitrogen-containing basic compound, metallic elements and a silicic acid derivative in the carbonic acid diester at specific values or less, prescribing the material quality of the reaction facilities, and/or forming an oxide layer at the inner wall surfaces of the reaction facilities. <IMAGE> |
申请公布号 |
EP0992522(A4) |
申请公布日期 |
2000.08.09 |
申请号 |
EP19990917100 |
申请日期 |
1999.04.22 |
申请人 |
TEIJIN LIMITED |
发明人 |
SASAKI, KATSUSHI;FUNAKOSHI, WATARU;SAWAKI, TORU;HIRATA, MASUMI;KANEKO, HIROAKI;ABE, MASANORI;SIMONARU, MASASI;TAKEMOTO, HIDEMI;MATSUO, JYUHOU;MATSUOKA, YOSHIKI |
分类号 |
C08G64/30 |
主分类号 |
C08G64/30 |
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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