| 摘要 |
Polyphenylene oxides are prepared by oxidative coupling of aromatic monohydroxyl compounds such as 2,6-xylenol, in the presence of copper halide/amine catalysts, in which at least part of the amine component is an aromatic diamine, such as N,N'-diphenylethylenediamine, N,N'-diphenyl-N,N'-dimethylethylenediamine, N,N'-diphenylpiperazine or N,N,N',N'-tetramethyl-o-phenylenediamine. Other amines which are preferably present in the catalyst are a tertiary monoamine, such as dimethyl-n-butylamine and a secondary monoamine, such as di-n-butylamine. These diamines are characterised by a low consumption rate during the polymerisation, and the catalysts prepared with them are hydrolytically stable.
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