3m Innovative Properties Company

Hoechst Aktiengesellschaft

Dyneon Gmbh

Ludwig Mayer

Klaus Hintzer

Michael C Dadalas

Richard M Flynn

George G I Moore

Timothy J Hebrink

Tilman C Zipplies

Harald Kaspar

Werner Schwertfeger

Denis Duchesne

Kai Helmut Lochhaas

Andreas R Maurer

Ralph Kaulbach

Michael Jürgens

Jay F Schulz

Herbert Koenigsmann

Thomas J Blong

Friedrich Kloos

Gernot Loehr

Albert Killich

Gernot Lohr

Erik Peters

Gernot L&ouml;hr

Lisa P Chen

Attila A Molnar

James Arthur McDonell

Peter Bissinger

Gernot Löhr

Manfred Schmid

Sebastian F Zehentmaier

Hermann Bladel

Kai-Uwe Tonnes

Gerhard Goldmann

Michael JÜRGENS

James A Mcdonell

George GI Moore

Werner Schwertferger

Provided are a tetrafluoroethylene copolymers having a melting point of at least 317&#xb0; C., a melt flow index (MFI) at 372&#xb0; C. and a 5 kg load (MFI 372/5) of from about 0.60 g/10 min up to about 15 g/10 min. Also provided are methods of forming a shaped article using the copolymers described above, shaped articles made with those copolymers and compositions containing such copolymers.

High melting PTFE polymers for melt-processing

Provided is an article comprising a bearing, wherein the bearing has disposed upon it a fluoropolymer composition. The fluoropolymer composition comprises a fluoropolymer and a pH-dependent surfactant.

Fluoropolymer coated articles

High melting PFTE polymers for melt-processing

A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula:[R&#x2014;O-L-COO]X&#x2003;&#x2003;(I)

Method of making fluoropolymer dispersion

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.

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

A coating composition having (i) an aqueous dispersion of fluoropolymer particles comprising a non-melt processible polymer of tetrafluoroethylene, (ii) a fluorinated surfactant, (iii) a non-ionic non-fluorinated surfactant and (iv) a non-fluorinated polymer, wherein the fluorinated surfactant is selected from fluorinated carboxylic acids or salts thereof of the general formula (I):[R&#x2014;O-L-COO]X&#x2003;&#x2003;(I)wherein L represents a linear partially or fully fluorinated alkylene group or an aliphatic hydrocarbon group, Rrepresents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one or more oxygen atoms, Xrepresents a cation having the valence i and i is 1, 2 or 3.

Coating composition

Provided is a method comprising polymerizing at least one fluorinated monomer in an aqueous emulsion polymerization in the presence of a carbosilane surfactant having at least one hydrophobic part, wherein the hydrophobic part has at least one silicon atom, and having at least one hydrophilic part, with the proviso that the carbosilane contains no Si&#x2014;O bonds.

Preparation and stabilization of fluoropolymer dispersions

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

The present invention provides a method of making a fluoropolymer through emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated surfactant. At least part of the fluorinated surfactant is added to the aqueous phase as an aqueous mixture with at least one organic liquid that is not miscible with water and that is selected from halogenated and non-halogenated organic liquids, the mixture having droplets having an average droplet diameter of not more than 1000 nm and the mixture being added to the aqueous phase in such an amount that the total amount of the fluorinated surfactant is not more than 1% by weight based on the weight of the aqueous phase and the total amount of said organic liquid is not more than 1% by weight based on the weight of said aqueous phase. The invention allows for an improvement of the efficiency of an aqueous emulsion polymerization process. In particular, the polymerization time can be reduced and the polymer yield may be improved.

Aqueous emulsion polymerization process for producing fluoropolymers

A fluoropolymer composition is provided. The polymer comprises interpolymerized units derived from (i) tetrafluoroethylene, (ii) vinylidene fluoride, (iii) at least one ethylenically unsaturated monomer of the formula CF &boxH;CFR where R is a perfluoroalkyl or a perfluoroalkoxy of 1 to 8 carbon atoms, and (iv) a perfluorovinyl ether of the formula CF &boxH;CF&mdash;(OCF CF(R )) OR where R is as described in (iii), R is a perfluoroaliphatic, preferably a perfluoroalkyl or a perfluoroalkoxy, of 1 to 8, preferably 1 to 3, carbon atoms, and a has a value of 0 to 3.

Fluoropolymers with improved characteristics

A fluoropolymer composition is provided. The polymer comprises interpolymerized units derived from (i) tetrafluoroethylene, (ii) vinylidene fluoride, (iii) at least one ethylenically unsaturated monomer of the formula CF &boxH;CFR where R is a perfluoroalkyl or a perfluoroalkoxy of 1 to 8 carbon atoms, and (iv) a perfluorovinyl ether of the formula CF &boxH;CF&mdash;(OCF CF(R )) OR&prime; where R is as described in (iii), R&prime; is a perfluoroaliphatic, preferably a perfluoroalkyl or a perfluoroalkoxy, of 1 to 8, preferably 1 to 3, carbon atoms, and a has a value of 0 to 3.

Growing community of inventors

Burgkirchen, Germany

Ludwig Mayer