Polyphenylene oxide preparation in an aqueous dispersion

Details Polyphenylene oxide preparation in an aqueous dispersion Polyphenylene oxide preparation in an aqueous dispersion

1984-05-29

1986-04-08

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528212, 528214, 528216, 528217, 528218, C08G 6544

Patent

active

045814392

ABSTRACT:
Polyphenylene oxides are prepared by the catalytic reaction of oxygen with at least one monohydroxyaromatic compound in a system which includes an organic solvent and an aqueous phase comprising a solution of at least one inorganic halide salt, preferably sodium bromide. This system enables the reaction to be conducted in the presence of the aqueous phase without deactivating the oxidative coupling catalyst. This system preferably also contains a minor amount of at least one surfactant selected from the group consisting of cationic surfactants having an HLB within the range of about 12-15 and amphoteric surfactants. The presence of a surfactant facilitates polymer recovery by promoting formation of readily filterable solid polymer particles in the aqueous system.

REFERENCES:
patent: 4058504 (1977-11-01), Yonemitsu et al.
patent: 4083828 (1978-04-01), Olander
patent: 4184034 (1980-01-01), Olander
patent: 4211857 (1980-07-01), Sugio et al.
patent: 4335234 (1982-06-01), Olander et al.
patent: 4396757 (1983-08-01), Ragimov et al.
patent: 4427594 (1984-01-01), Banucci et al.

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