Process for producing polyphenylene oxide

Details Process for producing polyphenylene oxide Process for producing polyphenylene oxide

C - Chemistry, Metallurgy

08

G

402/359, 400/630

C08G 65/44 (2006.01) C08L 25/06 (2006.01) C08L 71/12 (2006.01)

Patent

CA 1181898

ABSTRACT OF THE DISCLOSURE The present invertion provides a process for producing a polyphenylene oxide of very high molecular weight, which com- prises contacting a phenolic monomer with oxygen in the presence of a catalyst composed of a manganese (II) salt and an ortho- hydroxyazo compound represented by the following formula: Image wherein A and B represent identical or different arylene rings having a valency of at least 2 and having an oxy group and an azo group directly linked to the ortno carbon atoms ?e arylene ring and R represents hydrogen or lower alkyl or in the presence of said catalyst and an amine, in a polymerization solvent containing a base and thereby subjecting said phenolic monomer to an oxidative polymeriza- tion. The present invention also provides such a polyphenylene oxide of very high molecular weight which together with a styrene resin forms a blend of very excellent impact strength characteristics.

397637

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