Patent application number | Description | Published |
20090108501 | Polymerization Process - A fluoropolymer [polymer (F)], a polymerisation process for its manufacture, and a moulding process using such fluoropolymer [polymer (F)]. | 04-30-2009 |
20090202883 | Catalyst-Polymer Liquid Dispersion For Fuel Cell Applications - Catalyst-polymer liquid dispersion (LD) comprising (i) catalyst particles, (ii) polymer particles consisting of at least one (per)fluoro sulfonyl fluoride polymer in the —SO | 08-13-2009 |
20100040912 | Process for operating a fuel cell in dry conditions - The invention pertains to a process for operating a polymer electrolyte membrane fuel cell (PEMFC), said PEMFC comprising:
| 02-18-2010 |
20110052798 | CCM COMPOSITE - CCM formed of a membrane having on one of the two surfaces a first electrocatalytic layer containing a catalyst and on the other one a second electrocatalytic layer containing a catalyst, said electrocatalytic layers and said membrane containing (per)fluorinated ionomers, said CCM having the following characteristics:
| 03-03-2011 |
20120128868 | COMPOSITE IONOMERIC MEMBRANE - A composite ionomeric membrane comprising a layer or film of a porous inert material on which a (per) fluorinated sulphonic ionomer is deposited wherein the sulphonic groups are at the end of short side chains (SSC), said ionomer having:
| 05-24-2012 |
Patent application number | Description | Published |
20090258273 | ASSEMBLIES FOR ELECTROCHEMICAL DEVICES - MEA 7-layer assemblies with gasket, comprising:
| 10-15-2009 |
20090264596 | FLUOROELASTOMER COMPOSITIONS - Fluoropolymers comprising a fluoroelastomer matrix incorporating therein particles of a semicrystalline fluoropolymer formed of tetrafluoroethylene (TFE) homopolymers or copolymers, wherein the average particle sizes of the semicrystalline fluoropolymer latex range from 10 to 100 nm. | 10-22-2009 |
20120289616 | PROCESS FOR STABILIZING FLUOROPOLYMER HAVING ION EXCHANGE GROUPS - The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising: suspending at least one semi-crystalline fluoropolymer having ion exchange groups [polymer (I)] in at least one fluorinated organic dispersing medium [medium (M)] so as to obtain a dispersion (D) of polymer (I) in a dispersing medium (M); contacting said dispersion (D) with fluorine under irradiation with U. V. radiation so as to obtain a stabilized polymer. Still objects of the invention are a stable semi-crystalline fluoropolymer as above defined having a low amount of unstable ends groups of —COF type, the use of the stabilized fluoropolymer obtained by the process or of the stable fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly comprising said fluoropolymers. | 11-15-2012 |
20140235816 | (PER) FLUOROPOLYMER COMPOSITION - The present invention relates to (per)fluoropolymer compositions, in particular to (per)fluoropolyether compositions comprising: —a (per)fluoropolymer having more than two carboxy groups and —a polyamine. The invention further relates to processes for preparing said compositions and to moulded articles obtained from said compositions. | 08-21-2014 |
20140315121 | METHOD FOR THE PREPARATION OF CATALYST-COATED MEMBRANES METHOD FOR THE PREPARATION OF CATALYST-COATED MEMBRANES - The present invention is directed to a method for preparing an integral 3-layer catalyst-coated membrane (CCM) for use in electrochemical cells, e.g. PEM (polymer-electrolyte membrane) fuel cells. The process comprising the steps of preparing a first catalyst layer on a supporting substrate, subsequently coating the first catalyst layer with an ionomer dispersion to form an ionomer layer (membrane), and applying a second catalyst layer on top of the ionomer layer. The ionomer dispersion applied in the membrane coating step has low viscosity in the range of 10 to 400 centipoises (cP) and an ionomer concentration in the range of 15 to 35 weight-%. With this method, CCMs with improved electrochemical performance and reduced cathode resistance are manufactured. | 10-23-2014 |
Patent application number | Description | Published |
20120076990 | Fluoroionomers dispersions having a low surface tension, low liquid viscosity and high solid content - The invention pertains to a process for manufacturing certain (per)fluoroionomer liquid compositions, comprising, inter alia, at least one of fluorination and treatment with a polar solvent, to the liquid compositions therefrom having an improved solids content/surface tension/liquid viscosity compromise, to the use of the same for manufacturing composite membranes and to composite membranes obtainable therefrom. | 03-29-2012 |
20130059961 | PVDF coating composition - A composition comprising at least one vinylidene fluoride (VDF) polymer [polymer (F)]; and inorganic particles at least partially coated with at least one perfluoropolyether block copolymer [polymer (E)] comprising: A) one or more (per)fluoropolyoxyalkylene segment (chain R | 03-07-2013 |
20130244131 | Fuel cell modules - A method for the preparation of corrugated fuel cell units from a composite laminate comprising an ion conductive membrane having first and second surface; a first electrocatalyst layer in contact with the first surface of the membrane; a second electrocatalyst layer in contact with the second surface of the membrane; a first metallic mesh in contact with said first electrocatalyst layer and a second metallic mesh in contact with said second electrocatalyst layer. | 09-19-2013 |
20130244138 | Liquid compositions of fluorinated ion exchange polymers - A liquid composition comprising at least one aprotic organic solvent and at least one fluorinated ion exchange polymer which consists of recurring units derived from a chlorofluoroolefin of formula CF | 09-19-2013 |