abstract |
PURPOSE: To prepare a polyphenylene ether with low nitrogen content and low odor properties. n CONSTITUTION: In oxidative coupling reaction of 2,6-disubstd. xylenol, a novel catalyst contg. a copper compd., a diamine, a tert. amine, a quaternary ammonium compd. and an unsatd. compd. selected from olefinic, acetylenic, imine and nitrile compd. is used. n COPYRIGHT: (C)1992,JPO |