Process for preparing polyphenylenethers

Details Process for preparing polyphenylenethers Process for preparing polyphenylenethers

C - Chemistry, Metallurgy

08

G

402/359

C08G 65/44 (2006.01)

Patent

CA 1239250

ABSTRACT Polyphenylenethers are prepared by oxidative poly- merization of phenols in the presence of oxygen and of organic bases (amines), by using copper based catalysts having general formula : (B)n(CU)aXbYz wherein B = optionally substituted naphthiridine group, X = halogen, or nitro group or perchlorate group, Y - bridge compound between the copper atoms, of the pyrazole or imidazole type, z = 1 or 1, wherefore : when z = 0, a and n, either like or unlike each other, are 1 or 2, b = an integer from 1 to 3, extremes included, while, when z = 1 : n = a = 2 b = 3. The use of these catalysts allows the attainment of high polymer yields without the necessity of using large amounts of bromide ion sources and amine mixtures which are not easily recoverable.

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