Stabilization of polyphenylene ether solutions

Details Stabilization of polyphenylene ether solutions Stabilization of polyphenylene ether solutions

1983-09-13

1985-01-29

Lee, Lester L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524104, 524110, 524186, 524205, 524282, 524291, 524323, 524345, 524354, 524356, 524380, 524611, 528212, 528214, 528215, 528216, 528217, C08L 7104

Patent

active

044966792

ABSTRACT:
A process for the preparation of high molecular weight polyphenylene ethers from alkyl-substituted monohydric phenols by an oxidative coupling reaction with oxygen in the presence of a catalyst complex of a copper salt and an organic amine, subsequent stopping of the reaction and removal of the metal component of the catalyst by addition of chelating and/or salt-forming agents, wherein the polymer solution is treated with a compound having the general structure: ##STR1## where R.sup.2 and R.sup.3 can be identical or different and each is OH, NH.sub.2, NHR.sup.5, where R.sup.5 is alkyl or cycloalkyl, or SH, and where R.sup.1 and R.sup.4 are identical or different, being hydrogen, alkyl, cycloalkyl, aryl, carbonyl, carboxyl, carboxyalkyl or nitrile, and can be linked to form a ring, advantageously in an amount of from 0.1 to 100 mmoles and advantageously in from 1 to 20% strength aqueous solutions.

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patent: 4380597 (1983-04-01), Erwied et al.
patent: 4384063 (1983-05-01), Luxon
patent: 4385146 (1983-05-01), Axelrod

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