Patent application number | Description | Published |
20100056737 | Process for manufacturing high to ultra high molecular weight polymers using novel bridged metallocene catalysts - The present invention relates to a process of manufacturing high, very high, and ultra high molecular weight polymers comprising predominantly ethylene monomers. Ethylene is reacted in the presence of a catalyst system to produce a polymer having a viscosimetrically-determined molecular weight of at least 0.7×10 | 03-04-2010 |
20110313071 | Polyethylene molding powder and porous articles made therefrom - The present invention relates to a new molding powder comprising polyethylene polymer particles. The molecular weight of the polyethylene polymer is within the range of from about 600,000 g/mol to about 2,700,000 g/mol as determined by ASTM 4020. The average particle size of the particles of the polyethylene polymer is within the range of from about 5 microns to about 1000 microns and the polyethylene has a powder bulk density in the range of from about 0.10 to about 0.30 g/cc. Also disclosed is a process for molding a shape from a molding powder comprising the inventive polyethylene polymer particles, as well as porous articles made in accordance with the process. The articles have excellent porosity and good strength for porous and porous filtration applications. | 12-22-2011 |
20130046040 | POLYETHYLENE POWDERS AND POROUS ARTICLES PRODUCED THEREFROM - A polyethylene powder has a molecular weight in the range of about 300,000 g/mol to about 2,000,000 g/mol as determined by ASTM-D 4020, an average particle size, D | 02-21-2013 |
20130066022 | SHAPED HIGH MOLECULAR WEIGHT POLYETHYLENE ARTICLES, THEIR PRODUCTION AND USE - A shaped article, suitable for in a prosthetic device, is formed of polyethylene having a molecular weight of at least 3×105 g/mol as determined by ASTM 4020, and has a yield strength greater than 20 as determined by DIN EN ISO 527. The polyethylene is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand. | 03-14-2013 |
20130071663 | ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE, ITS PRODUCTION AND USE - Ultra-high molecular weight polyethylene has a molecular weight greater than 20×106 gm/mol as determined by ASTM 4020 or by size exclusion chromatography (SEC) and is produced by polymerizing ethylene with a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand. | 03-21-2013 |
20130072649 | PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE - In a process for producing high molecular weight polyethylene, ethylene is contacted with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand under polymerization conditions comprising a temperature of about 20° C. to less than 90° C. and a pressure of about 4 bar to about 40 bar. | 03-21-2013 |
20130079483 | HIGH MOLECULAR WEIGHT POLYETHYLENE FIBERS AND MEMBRANES, THEIR PRODUCTION AND USE - In a process for producing an elongated polyethylene component, such as a fiber or membrane, polyethylene powder having a molecular weight of at least 3×10 | 03-28-2013 |
20130090400 | PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE - In a process for producing polyethylene having a molecular weight of at least 1×10 | 04-11-2013 |
20130090430 | PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE - In a process for producing polyethylene having a molecular weight of at least 3×105 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition in at least one hydrocarbon. The catalyst composition comprises a Group 4 metal complex of a phenolate ether ligand and the slurry includes from about 5 to less than 40 ppm per liter of a compound effective to increase the conductivity of said at least one hydrocarbon. | 04-11-2013 |
20130090438 | PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE - In a process for producing polyethylene having a molecular weight of at least 3×10 | 04-11-2013 |
20140004339 | POLYETHYLENE POWDERS AND POROUS ARTICLES MADE THEREFROM | 01-02-2014 |