Patent · US Expired

Aqueous emulsion polymerization in the presence of ethers as chain transfer agents to produce fluoropolymers

US6750304B2 · kind B2 · utility

26Cited by

34References

20Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Harald Kaspar · Altötting, DE
Klaus Hintzer · Woodbury, US
Karl D. Weilandt · Minneapolis, US
Jost Krichel · Neuötting, DE
Erik Peters · Garching bei München, DE
Lisa P. Chen · Okabena, US

Key dates

Filing date	Apr 30, 2002
Grant date	Jun 15, 2004
Priority date	—
Expiry date	Apr 30, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F216/1408
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention provides a method of making a fluoropolymer comprising repeating units derived from one or more gaseous fluorinated monomers. The method comprises an aqueous emulsion polymerization of gaseous fluorinated monomers in the presence of an ether selected from the group consisting of dimethyl ether (DME), methyl tertiary butyl ether (MTBE) and mixtures thereof.

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