Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Nitrogen-containing reactant
Reexamination Certificate
2006-03-27
2010-12-14
Gulakowski, Randy (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Nitrogen-containing reactant
C526S265000
Reexamination Certificate
active
07851584
ABSTRACT:
Disclosed are processes for preparing monomer complexes that include contacting 2,3,5,6-tetraminopyridine free base in water with 2,5-dihydroxy terephthalic acid dipotassium salt to form an aqueous mixture, and adjusting the pH of the aqueous mixture to within the range of from about (3) to about (5) to precipitate the monomer complex. Processes of polymerizing the monomer complexes, polyareneazoles, filaments and yarns are also disclosed.
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Demuth Ralf
Dindi Hasan
Martin Georg Valentin
Rodini David J
Schelhaas Michael
E. I. du Pont de Nemours and Company
Fang Shane
Gulakowski Randy
Magellan Systems International, LLC
Woodcock & Washburn LLP
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