发明授权
- 专利标题: Preparation of polyphenylene ethers
- 专利标题(中): 聚苯乙烯的制备
-
申请号: US695385申请日: 1991-05-03
-
公开(公告)号: US5171825A公开(公告)日: 1992-12-15
- 发明人: Carola Hedtmann-Rein , Bernhard Czauderna , Martina von Deessen , Karl Hennig
- 申请人: Carola Hedtmann-Rein , Bernhard Czauderna , Martina von Deessen , Karl Hennig
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX4015653 19900516
- 主分类号: C08G65/38
- IPC分类号: C08G65/38 ; C08G65/44
摘要:
A process for preparing polyphenylene ethers from monohydric phenols which have alkyl substituents in both ortho positions and possibly also in one meta position but not in the para position, by oxidative coupling with oxygen-containing gases in the presence of an oxidation catalyst and of an electrically conducting compound which counteracts the electrostatic charge in the reaction mixture, in organic solution, comprises using as electrically conducting compound a salt of a carboxamide derivative of the formula I ##STR1## or mixtures of such salts, where R.sup.1 is a saturated or singly or multiply unsaturated aliphatic group which can have a terminal phenyl group and which contains a total of 8-30 carbon atoms, it also being possible for these carbon atoms to be interrupted by isolated oxygen atoms,R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl,A is an aliphatic, araliphatic or cycloaliphatic or aromatic bridge of up to 10 carbon atoms,n and m are each 1 to 3,Q.sup..sym. is ammonium, an alkali metal cation or the equivalent of an alkaline earth metal cation or a cation of a metal of groups IVb to VIIb of the periodic table.