发明名称 |
Process for preparing polyphenylene ethers with a low fines content. |
摘要 |
<p>A process for preparing polyphenylene ethers in the form of powders having an average granule size of between 100 and 500 mu m, more than 70% and preferably more than 80% of the granules having a size within a 200 mu m range, and a maximum content of less than 0.1% of powder with a granule size of less than 10 mu m, comprising in succession: a) reacting one or more substituted phenols by oxidative polycondensation with oxygen in a solvent consisting of a toluene and methanol mixture, in the presence of a complex formed from a non-basic cupric salt and morpholine or a C-substituted derivative thereof, at a temperature of between 50 and 70 DEG C, until a dispersion of the polyphenylene ether in the reaction solvent is obtained, and b) recovering the polyphenylene ether obtained in this manner.</p> |
申请公布号 |
EP0594249(A2) |
申请公布日期 |
1994.04.27 |
申请号 |
EP19930202892 |
申请日期 |
1993.10.14 |
申请人 |
ENICHEM S.P.A. |
发明人 |
TARTARI, VITTORIO;FORLIN, ANNA;VOLPE, PAOLA;NADALI, GIAMPIETRO;CHECCHIN, ADRIANO;OLIVIERI DEL CASTILLO, GIANFRANCO |
分类号 |
C08G65/44;C08G65/38;C08G65/46;(IPC1-7):C08G65/44 |
主分类号 |
C08G65/44 |
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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