Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2008-07-08
2008-07-08
Walke, Amanda (Department: 1752)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S373000, C528S401000, C528S086000, C528S219000, C528S220000, C528S301000
Reexamination Certificate
active
07396895
ABSTRACT:
Disclosed is a process for preparing branched polyarylene ether polymers by (A) providing a reaction mixture comprising (i) a polyfunctional phenol compound of the formula Ar(OH)xwherein x≧3 and wherein Ar is an aryl moiety or an alkylaryl moiety, provided that when Ar is an alkylaryl moiety at least three of the —OH groups are bonded to an aryl portion thereof, (ii) a compound of the formulawherein m is 0 or 1, Y and Y′ each, independently of the other, is fluorine or chlorine, and A is as defined herein, (iii) a compound of the formulawherein B is as defined herein, and (iv) a carbonate base; and (B) heating the reaction mixture and removing generated water from the reaction mixture, thereby effecting a polymerization reaction. Also disclosed are polymers prepared by this process and imaging members containing these polymers.
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Byorich Judith L.
Walke Amanda
Xerox Corporation
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