Patent · US Active

Processes for increasing polymer inherent viscosity

US7683122B2 · kind B2 · utility

0Cited by

34References

20Claims

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
Qinghong Fu Adkins · Martinsville, US
Steven R. Allen · Midlothian, US
Georg Martin · Bocholt, DE
Ralf Demuth · Hilden, DE
Michael Schelhaas

Key dates

Filing date	Mar 27, 2006
Grant date	Mar 23, 2010
Priority date	—
Expiry date	Jun 16, 2028

Classification

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

Abstract

Disclosed are processes for preparing polyareneazole polymers including contacting a molar excess of a free base in water with a terephthalic acid salt to form an aqueous mixture, adjusting the pH to precipitate a monomer complex, contacting the monomer complex with metal powder, and polymerizing the monomer complex. Polyareneazoles, filaments and yarns are also disclosed.

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