Preparation of polyphenylene ethers

Details Preparation of polyphenylene ethers Preparation of polyphenylene ethers

C - Chemistry, Metallurgy

08

G

402/359

C08G 65/44 (2006.01) C08L 71/04 (1985.01)

Patent

CA 1239746

Abstract of the Disclosure: High molecular weight poly- phenylene ethers are prepared from monohydric phenols by an oxidative coupling reaction with oxygen in the presence of a solvent and of a catalyst complex consisting of a copper salt and an organic amine of the general formula Image where R1 is C2-C20-alkylidene, preferably C2-C12-alkylid- ene, or alkenylidene, R2 is H or C1-C12-alkyl, prefer- ably C1-C4-alkyl, or C5-C8-cycloalkyl, each of which is unsubstituted or substituted by functional groups, and n is an integer from 1 to 4, preferably 1 or 2. Preferred functional groups are -OR3, -NHR3 or -SR3, in which R3 is H C1-C12-alkyl or C5-C8-cycloalkyl, and the most suit- able amines are 3-tert.-butoxypropylamine, 4-tert.-butoxy- butylamine, 3-tert.-butoxy-2-methylpropylamine, 3-tert.- butoxy-2,3-dimethylpropylamine, 3-tert.-butoxy-2-methyl- octylamine and N-methyl-N-(4-tert.-butoxybutyl)-amine. The polyphenylene ethers can be processed to moldings by a thermoplastic method.

478833

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