Patent · US Active

Process for removing fluorosurfactant from an aqueous fluoropolymer dispersion using sorbent pouches

US7803277B2 · kind B2 · utility

0Cited by

15References

16Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Charles Joseph Noelke · Wilmington, US
Clay Woodward Jones · Fort Collins, US
Daniel N. Levy · Collex, CH
Michael Gene McClusky · Washington, US
David W. Johnson · San Diego, US

Key dates

Filing date	Feb 13, 2008
Grant date	Sep 28, 2010
Priority date	—
Expiry date	Feb 13, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F2001/422
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for reducing the fluorosurfactant content of an aqueous fluoropolymer dispersion by filling a container with fluoropolymer dispersion, inserting into the container a fabric pouch containing a fluorosurfactant sorbent so that the sorbent contacts the fluorosurfactant-containing aqueous fluoropolymer dispersion in the container and retains the fluorosurfactant to reduce fluorosurfactant content of said fluorosurfactant-containing aqueous fluoropolymer dispersion, and removing the fabric pouch from the container.

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