Method for the preparation of a poly(arylene ether), and...

Details Method for the preparation of a poly(arylene ether), and... Method for the preparation of a poly(arylene ether), and...

2007-04-17

2007-04-17

Truong, Duc (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S212000, C528S214000, C528S50200C, C528S503000, C264S050000, C264S045900

Reexamination Certificate

active

10953723

ABSTRACT:
A method for preparing a poly(arylene ether) with a reduced level of powder fines is described. In one embodiment, the method comprises oxidatively coupling a monohydric phenol in the presence of a solvent and a complex metal catalyst, to produce a poly(arylene ether) resin; and then removing a portion of the solvent to produce a concentrated solution having a cloud point Tcloud. The concentrated solution is then combined with an anti-solvent to precipitate the poly(arylene ether) in the form of a precipitation mixture. The concentrated solution usually has a temperature of at least about (Tcloud−10° C.) immediately before it is combined with the anti-solvent. The precipitation mixture has a temperature of at least about (Tcloud−40° C.) after its formation. Related poly(arylene ether) copolymers are also described.

REFERENCES:
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patent: 6472499 (2002-10-01), Braat et al.
patent: 0627466 (1994-12-01), None
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patent: WO03000769 (2003-01-01), None
International Search Report; International Application No. PCT/US2005/038952; International Filing Date Oct. 28, 2005; Date of Mailing Mar. 21, 2006 (5 pgs).

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