C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/359
C08G 65/38 (2006.01) C08G 65/46 (2006.01)
Patent
CA 1149997
Abstract of the Disclosure A method for recovering polyphenylene oxide having a high bulk density and a reduced content of fine particles from a solution of a polyphenylene oxide, which comprises adding a non-solvent composed of a lower alkyl alcohol and water to an aromatic solvent solution of a polyphenylene oxide substantially free from impuri- ties to precipitate the polyphenylene oxide, the weight ratio of the aromatic solvent to the lower alkyl alcohol being from 1:1 to 1:2 and the weight ratio of the lower alkyl alcohol to water being from 1:0.005 to 1:0.1 in the precipitation system, and the addition of the non- solvent being controlled such that a liquid composition of the aromatic solvent, the lower alkyl alcohol and water forms a single phase; and recovering the precipi- tated polyphenylene oxide.
327344
Hasebe Akio
Kawaki Takao
Kuramoto Atsuo
Kurihara Tatsuhiko
Masumoto Isamu
Mitsubishi Gas Chemical Company Inc.
Smart & Biggar
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