Patents by Inventor Edgar Leitz
Edgar Leitz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9080045Abstract: The invention relates to thermoplastic polycarbonate compositions which are impact-modified with ABS type polymers, said polycarbonate compositions being impact-modified with ABS type polymers are characterized by their excellent low temperature ductility, good processing properties expressed by relatively high melt volume rate (MVR) and good hydrolytic stability.Type: GrantFiled: June 20, 2012Date of Patent: July 14, 2015Assignee: Styrolution (Jersey) LimitedInventors: Gisbert Michels, Edgar Leitz, Frank Eisenträger
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Patent number: 7384576Abstract: The present invention provides a mixture containing a) at least 26 wt. % of gadolinium and b) one or more elements, alloys and/or compounds from the group consisting of barium, indium, tin, lanthanum, molybdenum, niobium, tantalum, zirconium and tungsten, a process for the preparation of this mixture, use of the mixture as radiation protection, use of the mixture to prepare polymeric radiation protection substances, a process for preparing radiation screening rubbers, thermoplastic materials and polyurethanes, a process for preparing products from the polymeric radiation protection substances and products made from these polymeric radiation protection substances.Type: GrantFiled: December 12, 2003Date of Patent: June 10, 2008Assignee: LANXESS Deutschland GmbHInventors: Hardy Jüngermann, Jürgen Kirsch, Heinz Pudleiner, Burkhard Werden, Edgar Leitz, Detlev Joachimi, Peter-Alexander Gottschalk, Klaus Zander, Klaus Mader, Richard Kopp, Alexander Iwanovitsch Korschunow, Konstantin Awtonomowitsch Kapitanow, Gennadij Grigorjewitsch Sawkin, Wladimir Michajlowitsch Nikitin, Jelena Saweljewna Nasarowa, Igor Leonidowitsch Ryshakow
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Publication number: 20080128658Abstract: The present invention provides a mixture containing a) at least 26 wt. % of gadolinium and b) one or more elements, alloys and/or compounds from the group consisting of barium, indium, tin, lanthanum, molybdenum, niobium, tantalum, zirconium and tungsten, a process for the preparation of this mixture, use of the mixture as radiation protection, use of the mixture to prepare polymeric radiation protection substances, a process for preparing radiation screening rubbers, thermoplastic materials and polyurethanes, a process for preparing products from the polymeric radiation protection substances and products made from these polymeric radiation protection substances.Type: ApplicationFiled: December 12, 2003Publication date: June 5, 2008Inventors: Hardy Jungermann, Jurgen Kirsch, Heinz Pudleiner, Burkhard Werden, Edgar Leitz, Detlev Joachimi, Peter-Alexander Gottschalk, Klaus Zander, Klaus Mader, Richard Kopp, Alexander Iwanovitsch Korschunow, Konstantin Awtonomowitsch Kapitanow, Gennadij Grigorjewitsch Sawkin, Wladimir Michajlowitsch Nikitin, Jelena Saweljewna Nasarowa, Igor Leonidowitsch Ryshakow
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Publication number: 20060116472Abstract: The present invention relates to molding compositions comprising graft polymer and featuring very good processability via extrusion without the occurrence of certain surface defects.Type: ApplicationFiled: May 13, 2005Publication date: June 1, 2006Inventors: Harry Staratschek, Hertber Eichenauer, Edgar Leitz
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Patent number: 6806318Abstract: Thermoplastic molding composition characterized in that the polymer proportion soluble in dichloromethane has a c50 value of acrylonitrile of ≧28 wt. % and a chemical distribution (c90−c10 value) of the acrylonitrile of ≧5 wt. % is disclosed. The composition is characterized by its improved processability by extrusion and thermoforming.Type: GrantFiled: October 10, 2001Date of Patent: October 19, 2004Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Peter Krüger, Edgar Leitz, Harry Staratschek
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Patent number: 6774166Abstract: A thermoplastic molding composition that features a combination of good notched impact strength and thermoplastic processability is disclosed. The composition contains one or more thermoplastic (co)polymers, a graft polymer and a combination of at least 3 components chosen from a compound (I) having at least one structural unit conforming to where M=a metal, and n=the valence of the metal M, and a compound (II) having at least one structural unit conforming to and a compound (III) having at least one structural unit conforming to and a compound (IV) that contains none of the structural units of (I), (II) and (III).Type: GrantFiled: December 7, 2001Date of Patent: August 10, 2004Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Edgar Leitz
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Patent number: 6639000Abstract: An additive mixture containing a dibenzoate and either or both of a compound containing at least one structural unit and a compound containing at least one structural unit is disclosed. The additive combination enhances the processability of a thermoplastic molding composition that contains a (co)polymer of styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride and N-substituted maleimide and a graft copolymer.Type: GrantFiled: September 18, 2001Date of Patent: October 28, 2003Assignee: Bayer AktiengesellschaftInventors: Wolfgang Siebourg, Edgar Leitz, Herbert Eichenauer
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Publication number: 20030022966Abstract: A composite containing an ABS component is disclosed.Type: ApplicationFiled: June 4, 2002Publication date: January 30, 2003Inventors: Edgar Leitz, Harry Staratschek, Herbert Eichenauer, Wolfgang Siebourg
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Publication number: 20030008948Abstract: A composite containing I) an ABS component which containsType: ApplicationFiled: June 4, 2002Publication date: January 9, 2003Inventors: Edgar Leitz, Harry Staratschek, Herbert Eichenauer, Wolfgang Siebourg
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Publication number: 20020115797Abstract: Thermoplastic molding composition characterized in that the polymer proportion soluble in dichloromethane has a c50 value of acrylonitrile of ≧28 wt. % and a chemical distribution (c90−c10 value) of the acrylonitrile of ≧5 wt. % is disclosed. The composition is characterized by its improved processability by extrusion and thermoforming.Type: ApplicationFiled: October 10, 2001Publication date: August 22, 2002Inventors: Herbert Eichenauer, Peter Kruger, Edgar Leitz, Harry Staratschek
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Publication number: 20020082326Abstract: An additive mixture containing a dibenzoate and either or both of a compound containing at least one structural unit 1Type: ApplicationFiled: September 18, 2001Publication date: June 27, 2002Inventors: Wolfgang Siebourg, Edgar Leitz, Herbert Eichenauer
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Patent number: 6140426Abstract: The present invention relates to thermoplastic graft polymer moulding compositions for high-gloss applications, which exhibit a reduced tendency of the additives to exude out of the thermoplastic composition during processing, and which exhibit reduced deposit build-up in the mould.Type: GrantFiled: March 24, 1998Date of Patent: October 31, 2000Assignee: Bayer AktiengesellschaftInventors: Bahman Sarabi, Herbert Eichenauer, Edgar Leitz, Heinrich Alberts, Thomas Eckel, Dieter Wittmann
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Patent number: 5994463Abstract: Thermoplastic polycarbonate/graft polymer moulding compositions containingA) 5 to 95 parts by weight of an aromatic polycarbonate,B) 1 to 50 parts by weight of at least one thermoplastic homopolymer, copolymer or terpolymer of styrene, .alpha.-methylstyrene, acrylonitrile, N-substituted maleimide or mixtures thereof,C) 1 to 50 parts by weight of at least one graft polymer ofC.1) 5 to 90 parts by weight of styrene, .alpha.-methylstyrene, acrylonitrile, N-substituted maleimide or mixtures thereof, onC.2) 95 to 10 parts by weight of a rubber with a glass transition temperature .ltoreq.0.degree. C. andD) 1 to 25 parts by weight (per 100 parts by weight A+B+C) of at least one additive selected from flame retardants, lubricants, antistatic agent, mould release agents or mixtures thereof,characterised in that the component B) is produced by bulk, solution or suspension polymerisation and has an oligomer content .ltoreq.1 wt.Type: GrantFiled: March 25, 1998Date of Patent: November 30, 1999Assignee: Bayer AktiengesellschaftInventors: Thomas Eckel, Dieter Wittmann, Heinrich Alberts, Bahman Sarabi, Herbert Eichenauer, Edgar Leitz
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Patent number: 5883189Abstract: Thermoplastic moulding compositions of the ABS type, containingI) at least one graft polymer, obtainable by emulsion polymerisation of resin-forming monomers in the presence of a mixture comprising a butadiene polymer latex (A) having a particle diameter d.sub.50 of .ltoreq.320 nm, a particle diameter distribution of 30 to 100 nm in width and a gel content of .ltoreq.70 wt. % and a butadiene polymer latex (B) having a particle diameter d.sub.50 of .gtoreq.370 nm, a particle diameter distribution of 50 to 500 nm in width and a gel content of .gtoreq.270 wt. %,II) at least one graft polymer, obtainable by emulsion polymerisation of resin-forming monomers in the presence of a butadiene polymer latex (C) having a particle diameter d.sub.50 of from 110 to 150 nm, a particle diameter distribution of 20 to 50 nm in width and a gel content of from 80 to 98 wt. %, andIII) at least one rubber-free copolymer composed of resin-forming monomersand the use of the moulding compositions for the production of mouldings.Type: GrantFiled: November 21, 1997Date of Patent: March 16, 1999Assignee: Bayer AGInventors: Herbert Eichenauer, Edgar Leitz
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Patent number: 5804656Abstract: Compositions of the ABS type containingA) one or more graft rubbers ofA.1) from 10 to 60 parts by weight of one or more monomers onA.2) from 40 to 90 parts by weight of one or more rubber backbones having glass transition temperatures <0.degree.C. andB) at least one rubber-free thermoplastic resin obtained by radical polymerisation of resin-forming monomers,wherein the rubber backbone A.2) has average particle diameters (d.sub.50 values) of from 0.20 to 0.35 .mu.m and the graft rubber A) has been produced by radical emulsion graft polymerisation with the use of an initiator system comprising organic hydroperoxide and an organic reducing agent, and the use thereof for the production of mouldings by deep drawing.Type: GrantFiled: January 6, 1997Date of Patent: September 8, 1998Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Peter Kruger, Harry Staratschek, Edgar Leitz, Dieter Wittman, Karl-Erwin Piejko, Jurgen Ramthun
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Patent number: 5741853Abstract: Thermoplastic moulding compositions of the ABS type ofI) at least one graft copolymer which is obtainable by emulsion polymerization of styrene and acrylonitrile in the weight ratio 90:10 to 50:50, wherein styrene and/or acrylonitrile can be completely or partly replaced by .alpha.-methylstyrene, methyl methacrylate or N-phenylmaleimide, in the presence of at least two butadiene polymer latices of types (A) and (B), which each contain, copolymerized, 0 to 50 wt. % of a further vinyl monomer, and wherein the weight ratio of monomers used to butadiene polymers used is 25:75 to 70:30, andII) at least one copolymer of styrene and acrylonitrile in the weight ratio 90:10 to 50:50, wherein styrene and/or acrylonitrile can be completely or partly replaced by .alpha.-methylstyrene, methyl methacrylate or N-phenylmaleimide, characterized in that the butadiene polymer latex (A) has a particle diameter d.sub.50 .ltoreq.320 nm, a width of the particle size distribution (measured as d.sub.90 -d.sub.Type: GrantFiled: May 22, 1996Date of Patent: April 21, 1998Assignee: Bayer AGInventors: Herbert Eichenauer, Ulrich Jansen, Karl-Erwin Piejko, Edgar Leitz
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Patent number: 5708079Abstract: Thermoplastic moulding compositions containingA) 5 to 95 parts by wt of at least one particle-shaped graft rubber polymer of the ABS type manufactured by emulsion polymerization, in which the graft rubber particles have such a structure detectable by transmission electron microscope photographs, in which the individual particles contain irregular cell-shaped inclusions of resin-forming polymer and the surface of the particles shows such an irregular toothed structure, that for every particle imaged 5 to 30 of such teeth are present, which are distinguished from an idealized round particle (with a diameter d) by a diameter d+d/x with x=3 to 15,B) 95 to 5 parts by wt of at least one particle-shaped graft rubber polymer of the ABS type manufactured by emulsion polymerization, in which the graft rubber particles have such a structure detectable by transmission electron microscope photographs, in which the individual particles do not have a pronounced inner structure as in A) and possess a round particle shape witType: GrantFiled: May 6, 1996Date of Patent: January 13, 1998Assignee: Bayer AGInventors: Herbert Eichenauer, Edgar Leitz, Karl-Erwin Piejko, Peter Kruger
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Patent number: 5696204Abstract: Thermoplastic moulding compositions comprisingA) 1 to 60 parts by weight of at least one particulate graft rubber polymer of the ABS type which is produced by emulsion polymerisation, in which at least 50% of the graft rubber particles (number) have a structure detectable via transmission electron microscopy photographs in which the individual particles contain irregular cellular inclusions of resin-forming polymer and the surface of the particles has an irregular jagged structure such that 5 to 30 of such peaks are present per depicted particle, which particles differ from an idealised round particle (having a diameter d) by a diameter d+d/x, where x=3 to 15,B) 40 to 99 parts by weight of at least one particulate graft rubber polymer of the ABS type which is produced by solution or bulk polymerisation and which has the morphology which is characteristic of bulk types of ABS, and optionallyC) 0 to 200 parts by weight of at least one thermoplastic, rubber-free resin.Type: GrantFiled: February 26, 1996Date of Patent: December 9, 1997Assignee: Bayer AGInventors: Herbert Eichenauer, Edgar Leitz, Karl-Erwin Piejko, Heinrich Alberts
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Patent number: 5674939Abstract: Moulding compounds the ABS type consisting of at least one resin matrix and a particulate graft-rubber polymer distributed therein and produced by emulsion polymerisation, wherein at least 70% of the graft-rubber particles (number) exhibit a structure of the rubber phase which can be detected by photographs taken with the aid of a transmission electron microscope and in which the individual particles contain irregular cellular inclusions of resin-forming polymer and the surface of the particles exhibits an irregularly jagged structure such that, for each particle illustrated, 5 to 30 of such jagged projections are present which differ from an idealised round particle (with a diameter d) by virtue of a diameter d+d/x with x=3 to 15, as well as a process for the manufacture of said moulding compounds.Type: GrantFiled: November 13, 1995Date of Patent: October 7, 1997Assignee: Bayer AktiengesellschaftInventors: Herbert Eichenauer, Adolf Schmidt, Edgar Leitz, Karl-Erwin Piejko
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Patent number: 5605963Abstract: ABS polymer compositions consisting ofA) 5 to 80 parts by weight of at least one ABS polymer prepared by mass polymerization or solution polymerization, having rubber particles with an average particle diameter of from 800 to 15,000 nm and a rubber content of from 1 to 20% by weight,B) 1 to 50 parts by weight of at least one ABS polymer prepared by emulsion polymerization, having an average particle diameter of from 50 to 500 nm and a rubber content of from 20 to 80% by weight,C) 0 to 70 parts by weight of at least one thermoplastic vinyl resin prepared by radical polymerization of at least two monomer components selected from styrene, .alpha.-methylstyrene, methyl methacrylate, acrylonitrile, N-phenylmaleimide andD) 0.5 to 10 parts by weight of at least one polybutadiene prepared by emulsion polymerization, having an average particle diameter d.sub.50 in the latex form of from 80 to 500 nm and a gel content of from 10 to 95% by weight.Type: GrantFiled: February 6, 1995Date of Patent: February 25, 1997Assignee: Bayer AktiengesellschaftInventors: Edgar Leitz, Herbert Eichenauer, Karl-Erwin Piejko, Dieter Wittmann, Ekkehard Frohberg