| Patent application number | Description | Published |
|---|
| 20090152776 | Core/Shell Polymer and Fluoropolymer Blending Blown Film Process - A process for extruding a partially crystalline melt-fabricable perfluoropolymer. The process comprises blowing film from a perfluoropolymer having polytetrafluoroethylene sub-micrometer particles dispersed therein. The perfluoropolymer composition is a core/shell polymer or a dispersion blend or a melt-mixed polymer. | 06-18-2009 |
| 20090200711 | Core/Shell Polymer and Fluoropolymer Blending Blow Molding and Blown Film Process - A process is provided for extruding a partially crystalline melt-fabricable perfluoropolymers. The process comprises blow molding from a perfluoropolymer having polytetrafluoroethylene sub-micrometer particles dispersed therein. The perfluoropolymer composition is a core/shell polymer, with pelletized blend, a dispersion blend or a melt-mixed polymer. | 08-13-2009 |
| 20100022713 | Fluoropolymer Blending Process - Aqueous dispersions on non-melt flowable PTFE and melt-fabricable perfluoropolymer are mixed together, followed by recovery of the resultant mixture of the dispersed particles of each of these polymers, and melt mixing of the resultant mixture of particles to obtain a blend in which the PTFE particles form the disperse phase and the perfluoropolymer forms the continuous phase, the melt mixing producing advantageous melt viscosities and the blend exhibiting advantageous physical properties even at high PTFE contents of about 30 wt %. | 01-28-2010 |
| 20100113702 | Fluoropolymer Composition - A melt-mixed composition of non-melt flowable polytetrafluoroethylene (PTFE) and melt-fabricable perfluoropolymer is provided that exhibits thixotropy at increasing shear rate in the molten state and high elongation at break even at PTFE concentrations well above 4 wt %, based on the combined weight of the PTFE and the perfluoropolymer, e.g. at least 200% up to at least 30 wt % PTFE, the composition also exhibiting the structure of a dispersion of submicrometer-size particles of the PTFE in a continuous phase of the melt-fabricable perfluoropolymer. | 05-06-2010 |
| 20100288533 | Foamable Fluoropolymer Composition - A foamable fluoropolymer composition containing foam cell nucleating agent is provided, wherein the fluoropolymer comprises melt-fabricable tetrafluoroethylene-/hexafluoropropylene copolymer and tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, wherein the alkyl contains 1 to 4 carbon atoms, wherein the melting temperature of said tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer is no more than 35° C. greater than the melting temperature of said tetrafluoroethylene/hexafluoropropylene copolymer, and/or wherein said tetrafluoroethylene/hexafluoropropylene copolymer and said tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer each have a melt flow rate (MFR) within the range of 1 to 40 g/10 min and the MFR of one of said copolymers is at least twice that of the other of said copolymers. | 11-18-2010 |
| 20110092614 | APPLICATIONS OF ETHYLENE/TERAFLUOROETHYLENE COPOLYMER - Ethylene/fluoroethylene copolymer of improved non-flammability as characterized by limiting oxygen index is provided in the form of core/shall polymer, the core being non-melt flowable polytetrafluoroethylene and the shell being said copolymer and comprising at least about 72 wt % of the combined weight of the polytetrafluoroethylene core and the copolymer shell. | 04-21-2011 |
| 20110092644 | AQUEOUS DISPERSION POLYMERIZATION PROCESS FOR ETHYLENE/TETRAFLUOROETHYLENE COPOLYMER - A polymerization process is provided to form a copolymer of ethylene with tetrafluoroethylene and a modifying monomer having a side chain containing at least two carbon atoms by initiating the polymerization in an aqueous medium with a fluoromonomer that forms a stable dispersion of polymer particles from the fluoromonomer in the aqueous medium, which forms polymerization sites for further polymerization, and carrying the further polymerization by copolymerizing the ethylene, tetrafluoroethylene, and modifying monomer as a dispersion in at least said aqueous medium to a polymer solids content of at least 15 wt %, said copolymer comprising at least 60 wt % of the total polymer content of the polymer solids. | 04-21-2011 |
| 20110213088 | HEAT AGED PERFLUOROPOLYMER - Tensile strength after heat aged of articles molded from melt-fabricable perfluoropolymer is improved by incorporating polytetrafluoroethylene as dispersed submicrometer-size particles into the melt-fabricable perfluoropolymer. | 09-01-2011 |
