Patent · US Active

Process for preparing monomer complexes

US7851584B2 · kind B2 · utility

1Cited by

34References

13Claims

0Family size

Assignees

E.I. DU PONT DE NEMOURS AND COMPANY · US
Magellan Systems International LLC · US

Inventors

Doetze Jakob Sikkema · Doesburg, NL
David J. Rodini · Midlothian, US
Hasan Dindi · Wilmington, US
James Schultz · Lake Zurich, US
Georg Martin · Bocholt, DE
Ralf Demuth · Hilden, DE
Michael Schelhaas

Key dates

Filing date	Mar 27, 2006
Grant date	Dec 14, 2010
Priority date	—
Expiry date	Dec 17, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G73/22
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.