Method for the purification of poly(arylene ethers)

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United States of America Patent

PATENT NO 9598537
APP PUB NO 20160075825A1
SERIAL NO

14786986

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Abstract

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The invention relates to a method for the purification of poly(arylene ethers) of formula (I) in which m=0 to 1.0, n=1.0-m, and Ar1, Ar2, Ar3 and Ar4 independently represent divalent arylene groups. The compound of formula (I) is produced in a first step 1, with a raw product being obtained by bringing a metal or ammonium salt of divalent dihydroxy derivatives of Ar1 or Ar3 into contact with one or more dihalogenated derivatives of Ar2 and/or Ar4, in the presence of a solvent LM1. A precipitate that is present, if appropriate, is separated (step B) so as to obtain a solution L which then undergoes a membrane filtration (step C).

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Patent Owner(s)

Patent OwnerAddress
EVONIK OPERATIONS GMBHRELLINGHAUSER STRASSE 1-11 ESSEN 45128

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Herwig, Jürgen Hünxe, DE 7 30
Micoine, Kévin Herten, DE 8 20
Roos, Martin Haltern am See, DE 49 728
Weinelt, Frank Billerbeck, DE 28 243

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