Removal of the catalyst from polyphenylene ethers

Details Removal of the catalyst from polyphenylene ethers Removal of the catalyst from polyphenylene ethers

1983-07-29

1984-11-13

Lee, Lester L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

423 24, 528212, 528215, 528216, 528217, C08G 6546

Patent

active

044827059

ABSTRACT:
High molecular weight polyphenylene ethers are prepared from monohydric phenols by an oxidative coupling reaction with oxygen in the presence of a catalyst complex obtained from a copper salt and an organic amine by a method wherein the metal component of the catalyst is separated off, after the polymerization, by the addition of a polymeric polycarboxylic acid which is essentially composed of unsaturated monofunctional or difunctional carboxylic acids and/or their anhydrides.
Advantageously, the polymeric polycarboxylic acids used are homopolymers or copolymers of (a) from 50 to 100% by weight of one or more unsaturated monofunctional acids of 3 to 10 carbon atoms and/or one or more difunctional acids or their anhydrides of 4 to 6 carbon atoms and from 0 to 50% by weight of one or more monomers which do not possess an acid function and can be copolymerized with (a).

REFERENCES:
patent: 3755264 (1973-08-01), Testa
patent: 3837481 (1974-09-01), Stungis et al.
patent: 3838102 (1974-09-01), Bennett et al.
patent: 4097458 (1978-06-01), Bennett et al.
patent: 4150218 (1979-04-01), Dabrowski

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