3m Innovative Properties Company

Dyneon Gmbh

Albert Killich

Gernot Loehr

Klaus Hintzer

Thomas J Blong

Denis Duchesne

Ralph Kaulbach

Robert E Kolb

Friedrich Kloos

Ludwig Mayer

Bernhard Hirsch

Erik Peters

Tilman C Zipplies

William D Coggio

Werner M A Grootaert

Georg Burkard

Herbert Strasser

Harald Kaspar

Werner Schwertfeger

Gernot L&ouml;hr

Lisa P Chen

Gernot Löhr

Hans-Josef Staudt

Rudolf Erber

A tetrafluoroethylene/hexafluoropropylene copolymer with high drawability is provided. Also provided is a process employing the polymer and an article coated with the polymer.

Tetrafluoroethylene/hexafluoropropylene copolymers with higher drawability

Use of non-water-soluble organic fluorinated compounds, which are gaseous under the polymerization conditions and act as chain transfer agent in the gas phase, as explosion suppressors in the emulsion polymerization of tetrafluoroethylene.

Explosion-free process for the production of polytetrafluoroethylene

The invention relates to high purity fluoropolymers and processes for making such materials. These polymers are particularly suited for applications in the semiconductor industry. The process comprises removal of unstable polymer end groups by fluorination and removal of heavy metal impurities by extraction with an aqueous acid medium.

High purity fluoropolymers

High purity fluoropolymers are obtained by the emulsion polymerization process, removing essentially all ions and coagulating the polymer essentially without adding ions. These polymers are useful in the field of electronic devices.

Ultra-clean fluoropolymers

The invention provides a process for removing steam-volatile fluorinated emulsifiers in their free acid form, from aqueous fluoropolymer dispersions. The process comprises adding a nonionic emulsifier, to the aqueous fluoropolymer dispersion and, at a pH-value of the aqueous fluoropolymer dispersion below 5, removing steam-volatile fluorinated emulsifier by distillation until the concentration of steam-volatile fluorinated emulsifier in the dispersion reaches the desired value.

Method of making an aqueous dispersion of fluoropolymers

Process for working up aqueous dispersions of fluoropolymers. Fluoropolymer dispersions, in particular of fluoroelasomers, can be coagulated without adding chemicals, by compression with the aid of a gas and release through one or more small apertures.

Process for working up aqueous dispersions of fluoropolymers

Cured, latex-blended compositions featuring a fluoroelastomer and a fluoroplastic, and curable core-shell polymers having a fluoroelastomer precursor-containing shell and a fluoroplastic-containing core.

Fluoropolymer-containing compositions

Growing community of inventors

Burgkirchen, Germany

Albert Killich