Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2007-08-16
2009-06-23
Boykin, Terressa M (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C264S176100, C264S219000, C524S100000, C524S115000, C524S142000, C524S538000
Reexamination Certificate
active
07550551
ABSTRACT:
A process for preparing a polybromoaryl ether comprising adding to a solvent for the polybromoaryl ether a mixture of (1) at least one compound of the structure HO—Ar—X1, X2, X3, X4, X5, wherein Ar is an aryl group and X1, X2, X3, X4, and X5are independently selected from hydrogen and bromine, provided that at least one of X1, X2, X3, X4, and X5is bromine, (2) at least one alkali or alkaline metal hydroxide, and (3) at least one polymerization initiator, wherein the solvent for the polybromoaryl ether is a non-solvent for alkali metal bromides.
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Fielding William R.
Hanson Mark V.
Mathur Sumit
Timberlake Larry D.
Boykin Terressa M
Chemtura Corporation
Sher James
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