3m Innovative Properties Company

Hoechst Aktiengesellschaft

Targor Gmbh

Dyneon Gmbh

Dyneon Gmbh & Co. Kg

Friedrich Kloos

Ralph Kaulbach

Thomas J Blong

Denis Duchesne

Gernot Loehr

Harald Cherdron

Andreas Winter

Bernd Bachmann

Karlheinz Burg

Ludwig Mayer

Albert Killich

Helmut Schlaf

Erik Peters

Annette Vollmar

Klaus Hintzer

Michael C Dadalas

Gernot L&ouml;hr

Lisa P Chen

Leonard W Harvey

Georg Burkard

Rebekka Epsch

Peter Stamprech

Harald Kaspar

Werner Schwertfeger

William D Coggio

Maria P Dillon

Allan T Worm

Attila A Molnar

Helmut Strametz

Gernot Löhr

Wolfgang Neumann

Horst Neumann

Wolfgang Gordon

Susan S Woods

Kirsten J Fronek

Bernhard Dorrer

Peter Griffiths

The present invention provides a fluoropolymer dispersion comprising fluoropolymer particles having an average particle size of 10 to 400 nm dispersed in water whereby the dispersion is free of fluorinated surfactant having a molecular weight of less than 1000 g/mol or contains the fluorinated surfactant having a molecular weight of less than 1000 g/mol in an amount of not more than 0.025% by weight based on the total weight of solids in the dispersion. The dispersion further comprises a non-ionic surfactant and an anionic surfactant selected from fluorinated anionic surfactants having a molecular weight of at least 1000 g/mol, non-fluorinated anionic surfactants and mixtures thereof.

Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant

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

Fluoropolymer dispersions containing no or little low molecular weight fluorinated surfactant

A fluoropolymer having a melting point of at least 160&#xb0; C. is provided wherein the fluoropolymer is derived from tetrafluoroethylene as the major component, one or more perfluoro vinyl ethers as the minor component, the perfluoro vinyl ether having the formula CF&#x2550;CFO(CF)ORwherein n is from 2 to 6 and Ris a perfluoroalkyl group having 1 to 6 carbon atoms, and optionally a perfluoro alkyl vinyl ether having from 1 to 5 carbon atoms in the alkyl radical.

Fluoropolymers from tetrafluoroethylene and perfluoro(alkoxyalkyl vinyl) ether

The invention provides a fluorothermoplastic composition comprising interpolymerized units derived from about 94 to about 97.5 mole percent (mol %) tetrafluoroethylene (TFE), about 2 to about 3 mol % perfluoro (propyl vinyl ether) (PPVE), and about 0.5 to about 3 mol % hexafluoropropylene (HFP). The invention also provides a fluorothermoplastic composition comprising interpolymerized units derived from about 94 to about 97 mol % TFE, about 0.75 to about 3 mol % PPVE, and about 1.5 to about 3.5 mol % HFP. These fluorothermoplastic compositions have a flex life that fits the equation:log(flex life cycles)&#x2267;0.71+4.0*(MFI),a method of making fluorothermoplastic compositions, a method of improving stress crack resistance, and fluorothermoplastic articles.

Fluoropolymers resistant to stress cracking

Provided is a co-curable blend comprising (a) a fluoroplastic comprising (i) bromine atoms, iodine atoms, and combinations thereof, and (ii) units derived from a fluorinated monomer, and a peroxide curable fluoroelastomer gum. The invention also provides a composition comprising a fluoroplastic comprising (i) bromine atoms, iodine atoms, and combinations thereof and (ii) units derived from a fluorinated monomer, peroxide curable fluoroelastomer gum, a peroxide curative, and optionally a coagent. The fluoroplastic has an MFI no greater than 5 g/10 min., and/or an average particle size greater than 100 nm. The invention also provides a method of making a fluoropolymer blend and cured articles.

Co-curable blends featuring bromine-and iodine-containing fluoroplastic polymers

A low-molecular-weight copolymer of tetrafluoroethylene with units of perfluoro alkyl vinyl ethers having a melt index of &gE;30 suitable as a mixing component with a higher-molecular-weight copolymer of the same monomers for producing moldings in injection molding or by extrusion.

Mixtures of thermoplastic fluoropolymers

Provided is a melt-processible perfluorinated polymer composition comprising (a) a melt-processible perfluoropolymer comprising (i) from 80 to 98% by weight of repeating units derived from tetrafluoroethylene, (ii) from 2 to 20% by weight of repeating units derived from hexafluoropropylene, and (iii) from 0 to 5% by weight of repeating units derived from further comonomers other than tetrafluoroethylene and hexafluoropropylene, and wherein the proportion by weight of the repeating units derived from hexafluoropropylene units is greater than that of the repeating units of said further comonomers, and (b) from 0.01 to 5% by weight, based on perfluoropolymer (a), of a high-molecular-weight perfluorinated polymer with a melting point at least 20&deg; C. above that of the fluoropolymer (a). Also provided are processes for making and using such melt-processable compositions.

FEP with increased flexural fatigue strength and a low level of die deposits

Compositions, consisting essentially of a melt-spinnable polymer component and minor amounts of an emulsion polytetrafluoroethylene micropowder having a melting point sufficiently far above the processing temperature of the polymer component for the micro-powder not to melt during the processing of the polymer component are suitable for producing textile fiber materials.

Emulsion polytetrafluoroethylene micropowder additive for fiber-forming plastics

A multimodal fluoroplastic terpolymer composition is provided. The terpolymer can be extruded at high extrusion speeds without having to reduce its molecular weight. The terpolymer is useful by itself; in combination with conductive fillers to provide an electrostatically dissipative composition; and as a polymer processing aid. The polymer has a low molecular weight component, a high molecular weight component and, optionally an ultra-high molecular weight component.

Fluoroplastic polymers with improved characteristics

Polyolefin molding composition consisting essentially of a polyolefin formed from an olefin having at least 3 carbon atoms of the formula R.sup.a --CH.dbd.CH--R.sup.b, where R.sup.a and R.sup.b are identical or different and each is hydrogen or C.sub.1 -C.sub.15 -alkyl, straight-chain or branched, or R.sup.a and R.sup.b together with the atoms joining them together form a ring system, and from 0 to 10% by weight of ethylene or of a second olefin have the abovementioned meaning as comonomer, characterized by a 230/2.16 MFI from 5 to 1000 g/10 min, a 230/5 MFI from 15 to 3000 g/10 min, a molecular weight (M.sub.w) from 75,000 to 350,000 g/mol, a polydispersity (M.sub.w /M.sub.n) from 1.8 to 3.5, a viscosity number from 70 to 300 cm.sup.3 /g, a melting point from 120.degree. to 165.degree. C., an isotactic block length from 25 to 150, and ether extractables less than 2% by weight, based on the total weight of the polymer.

Process for producing fibers, filaments and webs by melt spinning

Growing community of inventors

Kastl, Germany

Friedrich Kloos