Preparation of polyphenylene ethers in the presence of defoamer

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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528212, 528215, C08G 6544

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active

052370399

ABSTRACT:
Polyphenylene ethers are prepared from monohydric phenols by oxidative coupling with oxygen-containing gases in the presence of an oxidation catalyst in an organic solvent by carrying out the polycondensation in the presence of a defoamer.

REFERENCES:
patent: 4396757 (1983-08-01), Ragimov et al.
Foam Control Agents, Kerner, Chem. Technol. Rev. No. 75, Noyes Data Corp. Park Ridge (1976), pp. vii-xii.
Ullman's Encyclopedia of Industrial Chemistry, 5th Ed. vol. Ai-366-372 p. 466.
P. G. Pape, J. Petrochem. Techn. 1197 (1983).

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