发明名称 |
METHOD OF PRODUCING POLYCARBONATE ARTICLES BY ROTATION MOLDING AND ROTATION MOLDED ARTICLES MADE BY THE METHOD |
摘要 |
A method for making a polycarbonate article is described wherein the article is made by rotation molding a melt polycarbonate having a weight average molecular weight from 25,000 to about 36,000. The melt polycarbonate is produced by transesterifying a diaryl carbonate and a dihydroxy compound in the presence of a catalyst system to form an intermediate aromatic polycarbonate, wherein the catalyst system comprises a first catalyst selected from the group consisting of alkali metal salts and alkaline earth metal salts; and a second catalyst selected from the group consisting of quaternary ammonium compounds and quaternary phosphonium compounds; adding to said intermediate aromatic polycarbonate a catalyst quencher, and rotation molding the aromatic polycarbonate at a temperature from about 305°C to about 360°C. Also disclosed are polycarbonate light diffusive articles produced by rotation molding. |
申请公布号 |
WO2007024425(A2) |
申请公布日期 |
2007.03.01 |
申请号 |
WO2006US29976 |
申请日期 |
2006.08.01 |
申请人 |
GENERAL ELECTRIC COMPANY;GOOSSENS, JOHANNES, MARTINUS, DINA |
发明人 |
GOOSSENS, JOHANNES, MARTINUS, DINA |
分类号 |
C08G64/30;B29C41/04 |
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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