Patent · US Active

Process for removing fluorinated emulsifier from fluoropolymer dispersions using an anion-exchange resin and a pH-dependent surfactant and fluoropolymer dispersions containing a pH-dependent surfactant

US8466231B2 · kind B2 · utility

4Cited by

106References

3Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Michael C. Dadalas · Eggenfelden, DE
Klaus Hintzer · Woodbury, US
Ludwig Mayer · San Jose, US
Tilman C. Zipplies · Burghausen, DE
James A. McDonell · Woodbury, US

Key dates

Filing date	Apr 8, 2009
Grant date	Jun 18, 2013
Priority date	—
Expiry date	Jul 11, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/3154
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process of reducing the amount of fluorinated emulsifiers in fluoropolymer dispersions by contacting the fluoropolymer dispersion with an anion exchange resin in the presence of a pH-dependent surfactant, and fluoropolymer dispersion containing the pH-dependent surfactant and uses thereof.

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