Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2005-05-24
2005-05-24
Truong, Duc (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S162000, C528S176000, C528S192000, C528S196000, C525S391000, C525S392000, C525S397000, C525S534000
Reexamination Certificate
active
06897282
ABSTRACT:
The invention relates to a method of forming a polyphenylene ether resin containing residual aliphatic unsaturation. A polyphenylene ether is reacted with a capping agent in a solvent to form the polyphenylene ether resin containing residual aliphatic unsaturation, which is precipitated from solution by combining the solution with an antisolvent. The precipitated polyphenylene ether resin containing residual aliphatic unsaturation has lower levels of residual impurities than the same compound isolated by devolatilization.
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Freshour Amy
Guo Hua
Howe Robert L.
Peters Edward N.
Yeager Gary William
General Electric
Truong Duc
LandOfFree
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