Patent application number | Description | Published |
20080274353 | Polyethylene Molding Composition for External Sheathing of Electric Cables - The invention relates to a polyethylene molding composition which has a multimodal molar mass distribution and is particularly suitable for producing external sheathing of electric or information transmission cables. The molding composition has a density at a temperature of 23° C. in the range from 0.94 to 0.95 g/cm | 11-06-2008 |
20090069477 | Polyolefinic molding composition having improved resistance to thermooxidative degradation and its use for the production of pipes - A molding composition is suitable for the production of pipes having improved resistance to thermooxidative degradation when these pipes are in long-term contact with liquids comprising disinfectants having an oxidizing effect. Such molding composition comprises, in addition to thermoplastic polyolefins, a polyoxy compound and/or a polyhydroxy compound as additive in an amount of from 0.01 to 1.0% by weight. In addition, the molding composition can further comprise an unsaturated aliphatic hydrocarbon in an amount of up to 5% by weight. The invention also relates to a process for improving the long-term resistance of water pipes to damage caused by oxidizing disinfectants from the water by use of this molding composition. | 03-12-2009 |
20090105422 | Multimodal polyethylene molding composition for producing pipes having improved mechanical properties - A polyethylene molding composition having a multimodal molecular mass distribution and comprising from 45 to 55% by weight of a low molecular weight ethylene homopolymer A, from 20 to 40% by weight of a high molecular weight copolymer B comprising ethylene and another olefin having from 4 to 8 carbon atoms and from 15 to 30% by weight of an ultrahigh molecular weight ethylene copolymer C can be prepared in the presence of a Ziegler catalyst in a three-stage process and is highly suitable for producing pipes having excellent mechanical properties. | 04-23-2009 |
20090311453 | Molding compostion comprsing polyethlene for preparing films and process for preparing the molding composition in the presence of a mixed catalyst - Molding composition comprising polyethylene and having a density in the range from 0.915 to 0.955 g/cm, an MI in the range from 0 to 3.5 g/10 min, an MFR in the range from 5 to 50, a polydispersity M | 12-17-2009 |
20100010163 | Polyethylene Molding Composition for Producing Injection-Molded Finished Parts - The invention relates to a polyethylene molding composition which has a multimodal molecular mass distribution and comprises a low molecular weight ethylene homopolymer A, a high molecular weight ethylene copolymer B and an ultrahigh molecular weight ethylene copolymer C. The molding composition has a density at a temperature of 23° C. in the range from 0.940 to 0.957 g/cm | 01-14-2010 |
20100076136 | MULTIMODAL POLYETHYLENE MOLDING COMPOSITION FOR PRODUCING PIPES HAVING IMPROVED MECHANICAL PROPERTIES - The sagging problem in the manufacture of thick walled pipes is solved using a polyethylene molding composition having a multimodal molecular mass distribution and comprising from 45 to 55% by weight of a first low molecular weight ethylene homopolymer A, from 20 to 40% by weight of a second high molecular weight copolymer B comprising ethylene and another olefin having from 4 to 8 carbon atoms and from 15 to 30% by weight of a third ultrahigh molecular weight ethylene copolymer C prepared in the presence of a Ziegler catalyst in a three-stage polymerization process comprising additionally an organic polyoxy compound or an organic polyhydroxy compound in an amount of from 0.01 to 0.5% by weight. | 03-25-2010 |
20100119753 | Polylefin Pipe Having Inherent Resistance To Thermooxidative Degradation - The invention relates to a plastic pipe having improved resistance to thermooxidative degradation when this pipe is in long-term contact with liquids which comprise disinfectants having an oxidizing action. To achieve this, the pipe according to the invention has a fluorine coating on its inner surface. | 05-13-2010 |
20110045295 | ADHESIVE POLYMER COMPOSITION - A novel adhesive composition suitable for composing multilayered coatings onto large, industrial equipment such as pipeline tubes is devised. The composition is a blend based on a polyethylene which determines the blend's favorable properties, which polyethylene itself can be used further in coating cables and for producing mouldings, especially rotomoulded articles. | 02-24-2011 |
20110192487 | Polyethylene Pipes - A new polymeric composition of extruded conduits and pipes is described, which is free of fluoroelastomer processing additive whilst maintaining superior processability. | 08-11-2011 |
20110218309 | Preparation of ultra high molecular mass polyethylene and ultra high molecular mass polyethylene having improved crosslink ability prepared thereb - The invention pertains to a method for the preparation of ultra high molecular mass polyethylene by polymerization in suspension or in gas phase in the presence of a chromium catalyst sitting on an alumosilicate support material. The chromium catalyst has been subjected to a fluorinating treatment and the polymerization is performed under low temperature conditions within a temperature range of from 50 to 100° C. The invention pertains also to ultra high molecular mass polyethylene prepared by that method and having a density in the range of from 0.930 to 0.950 g/cm | 09-08-2011 |
20120031495 | Thermoplastic Polymeric Composition with Improved Resistance to Thermo-Oxidative Degradation and Use Thereof for Producing Pipes - A polyolefinic moulding composition is suitable for producing pipes with improved resistance to thermo-oxidative degradation when these pipes are in extended contact with liquids which contain disinfectants with an oxidative action. Beside thermoplastic polyolefins, the moulding composition additionally contains specific aromatic amines which are liquid under standard conditions as an additive. The invention also relates to a pipe made from the moulding composition and to a process for improving the long-term resistance of water pipework made of plastics to damage by disinfectants with an oxidative action from the water by the use of this moulding composition. | 02-09-2012 |
20120064269 | Multilayered Composite Plastic Material Containing an Adhesion Promoter Interlayer - A multilayered composite structure comprises at least one layer (A) consisting of an ethylene homopolymer or copolymer, at least one layer (B) comprising a barrier material and at least one layer (C) comprising an adhesion promoter material serving to improve the adhesion between these layers, wherein the adhesion promoter material comprises an adhesive polymer composition comprising a) 20 to 95% (w/w) of an ethylene homo- or copolymer which is a copolymer of ethylene with C3-C20-alkene, and b) 5 to 80% (w/w) of a polar copolymer of ethylene with at least one comonomer which comonomer is selected from the group consisting of an acrylate and acrylic acid. The composite structure can be used for fuel containers, especially fuel tanks in automotive vehicles. | 03-15-2012 |
20120108766 | Polyethylene Composition and Finished Products Made Thereof - Novel polyethylenes having defined molecular weight distribution and LCB structure are devised, for films or mouldings. | 05-03-2012 |
20120148776 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120148777 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularyl advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120149834 | Polyethylene for Rotomoulding - A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles. | 06-14-2012 |
20120189772 | Process for preparing a polyolefin pipe having inherent resistance to thermooxidative degradation - A process for producing a pipe having improved resistance to thermooxidative degradation, the process comprising melting a polyolefinic molding composition in an extruder, extruding the molten molding composition through an annular die and subsequently cooling it, wherein the inner surface of the pipe is exposed to the action of a halogen-comprising treatment gas before or after cooling. | 07-26-2012 |