Patent · US Expired

Emulsifier free aqueous emulsion polymerization process for making fluoropolymers

US6693152B2 · kind B2 · utility

30Cited by

36References

18Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Harald Kaspar · Altötting, DE
Klaus Hintzer · Woodbury, US
Greet Dewitte · Tielt, BE

Key dates

Filing date	Apr 30, 2002
Grant date	Feb 17, 2004
Priority date	—
Expiry date	Apr 30, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F14/26
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Emulsifier free fluoropolymer manufacturing method in which (a) a mixture of an oxidizing agent and reducing agent is used to start the polymerization and where one or the other but not both, are further added during polymerization, or (b) an oxidizing metal ion is added to start polymerization and where additional oxidizing metal ion is added during polymerization.

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