Patents by Inventor Hagen Stawitzki
Hagen Stawitzki 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: 8765902Abstract: In a process for preparing a polyamide based on dicarboxylic acids and diamines in an extruder, a solid mixture comprising a monomer mixture composed of 50 mol % of dicarboxylic acid mixture composed of from 60 to 88 % by weight of terephthalic acid and from 12 to 40% by weight of isophthalic acid, in which up to 20% by weight of the dicarboxylic acid mixture may also be replaced by other dicarboxylic acids, and 50 mol % of hexamethylenediamine which may be up to 20% by weight replaced by other C2-30-diamines, in a corotatory twin-screw extruder for a residence time of from 10 seconds to 30 minutes, is heated to a temperature in the range from 150 to 400° C. while removing steam and if appropriate diamines through venting orifices.Type: GrantFiled: June 11, 2008Date of Patent: July 1, 2014Assignee: BASF SEInventors: Philippe Desbois, Michael Kopietz, Ralf Neuhaus, Hagen Stawitzki, Hans-Joachim Weis, Jochen Engelmann
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Patent number: 8759476Abstract: The process for preparing a polyamide based on dicarboxylic acids and diamines has the following stages: 1) providing an aqueous monomer mixture of dicarboxylic acids and diamines, the molar ratio of dicarboxylic acids to diamines being adjusted such that a molar deficiency of dicarboxylic acids or diamines of from 1 to 10 mol % is present at the outlet of stage 3), based on the other component in each case, 2) transferring the aqueous mixture from stage 1) to a continuous evaporator reactor in which diamines and dicarboxylic acids are reacted at a temperature in the range from 100 to 370° C. and a pressure in the range from 1 to 50 bar, 3) transferring the mixture from stage 2) to a separator which is operated at a temperature in the range from 100 to 370° C.Type: GrantFiled: June 12, 2008Date of Patent: June 24, 2014Assignee: BASF SEInventors: Philippe Desbois, Hagen Stawitzki, Ralf Neuhaus, Hans-Joachim Weis, Jurgen Weichmann, Racquel Fernandez Rodiles, Gunter Vogel
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Patent number: 8197715Abstract: Thermoplastic molding compositions comprising A) from 40 to 96% by weight of a semiaromatic polyamide, B) from 2 to 30% by weight of a copolymer composed of B1) from 35 to 89.9% by weight of ethylene, B2) from 10 to 60% by weight of 1-octene or 1-butene or propylene or a mixture of these, and B3) from 0.05 to 5% by weight of functional monomers, where the functional monomers have been selected from the group of the carboxylic acid groups, carboxylic anhydride groups, carboxylic ester groups, carboxamide groups, carboximide groups, amino groups, hydroxy groups, epoxy groups, urethane groups, or oxazoline groups, or a mixture of these, C) from 1 to 50% by weight of fibrous or particulate fillers, or a mixture of these, D) from 0.1 to 10% by weight of D1) at least one highly branched or hyperbranched polycarbonate with an OH number of from 1 to 600 mg KOH/g of polycarbonate (to DIN 53240, part 2), or D2) at least one highly branched or hyperbranched polyester of AxBy type, where x is at least 1.Type: GrantFiled: December 11, 2007Date of Patent: June 12, 2012Assignee: BASE SEInventors: Martin Weber, Xaver Hopfenspirger, Steffen Funkhauser, Walter Heckmann, Jörg Schnorr, Raquel Fernandez Rodiles, Rainer Klenz, Hagen Stawitzki, Bernd Bruchmann
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Patent number: 7919013Abstract: Thermoplastic molding compositions comprising A) from 40 to 96.2% by weight of a semiaromatic polyamide, B) from 2 to 30% by weight of an impact-modifying polymer which comprises functional groups, C) from 1 to 50% by weight of fibrous or particulate fillers or a mixture of these, D) from 0.2 to 5% by weight of a lubricant, E) from 0.5 to 15% by weight of an electrically conductive additive, F) from 0 to 30% by weight of other added materials, where the total of the percentages by weight of components A) to F) is 100%.Type: GrantFiled: July 17, 2007Date of Patent: April 5, 2011Assignee: BASF SEInventors: Martin Weber, Xaver Hopfenspirger, Steffen Funkhauser, Walter Heckmann, Jörg Schnorr, Raquel Fernandez Rodiles, Rainer Klenz, Hagen Stawitzki
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Publication number: 20100190952Abstract: In a process for preparing a polyamide based on dicarboxylic acids and diamines in an extruder, a solid mixture comprising a monomer mixture composed of 50 mol % of dicarboxylic acid mixture composed of from 60 to 88 % by weight of terephthalic acid and from 12 to 40% by weight of isophthalic acid, in which up to 20% by weight of the dicarboxylic acid mixture may also be replaced by other dicarboxylic acids, and 50 mol % of hexamethylenediamine which may be up to 20% by weight replaced by other C2-30-diamines, in a corotatory twin-screw extruder for a residence time of from 10 seconds to 30 minutes, is heated to a temperature in the range from 150 to 400° C. while removing steam and if appropriate diamines through venting orifices.Type: ApplicationFiled: June 11, 2008Publication date: July 29, 2010Applicant: BASF SEInventors: Phillippe Desbois, Michael Kopietz, Ralf Neuhaus, Hagen Stawitzki, Hans-Joachim Weis, Jochen Engelmann
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Publication number: 20100190934Abstract: The process for preparing a polyamide based on dicarboxylic acids and diamines has the following stages: 1) providing an aqueous monomer mixture of dicarboxylic acids and diamines, the molar ratio of dicarboxylic acids to diamines being adjusted such that a molar deficiency of dicarboxylic acids or diamines of from 1 to 10 mol % is present at the outlet of stage 3), based on the other component in each case, 2) transferring the aqueous mixture from stage 1) to a continuous evaporator reactor in which diamines and dicarboxylic acids are reacted at a temperature in the range from 100 to 370° C. and a pressure in the range from 1 to 50 bar, 3) transferring the mixture from stage 2) to a separator which is operated at a temperature in the range from 100 to 370° C.Type: ApplicationFiled: June 12, 2008Publication date: July 29, 2010Applicant: BASF SEInventors: Philippe Desbois, Hagen Stawitzki, Ralf Neuhaus, Hans-Joachim Weis, Jurgen Weichmann, Racquel Fernandez Rodiles, Gunter Vogel
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Publication number: 20100090174Abstract: Thermoplastic molding compositions comprising A) from 40 to 96% by weight of a semiaromatic polyamide, B) from 2 to 30% by weight of a copolymer composed of B1) from 35 to 89.9% by weight of ethylene, B2) from 10 to 60% by weight of 1-octene or 1-butene or propylene or a mixture of these, and B3) from 0.05 to 5% by weight of functional monomers, where the functional monomers have been selected from the group of the carboxylic acid groups, carboxylic anhydride groups, carboxylic ester groups, carboxamide groups, carboximide groups, amino groups, hydroxy groups, epoxy groups, urethane groups, or oxazoline groups, or a mixture of these, C) from 1 to 50% by weight of fibrous or particulate fillers, or a mixture of these, D) from 0.1 to 10% by weight of D1) at least one highly branched or hyperbranched polycarbonate with an OH number of from 1 to 600 mg KOH/g of polycarbonate (to DIN 53240, part 2), or D2) at least one highly branched or hyperbranched polyester of AxBy type, where x is at least 1.Type: ApplicationFiled: December 11, 2007Publication date: April 15, 2010Applicant: BASF SEInventors: Martin Weber, Xaver Hopfenspirger, Steffen Funkhauser, Walter Heckmann, Jörg Schnorr, Raquel Fernandez Rodiles, Rainer Klenz, Hagen Stawitzki, Bernd Bruchmann
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Publication number: 20090012229Abstract: Semiaromatic semicrystalline thermoplastic polyamide molding compositions, comprising A) from 40 to 100% by weight of a copolyamide composed of a1) from 30 to 44 mol % of units which derive from terephthalic acid a2) from 6 to 20 mol % of units which derive from isophthalic acid a3) from 42 to 49.5 mol % of units which derive from hexamethylenediamine a4) from 0.5 to 8 mol % of units which derive from aromatic diamines having from 6 to 30 carbon atoms, where the molar percentages of components a1) to a4) together give 100%, and B) from 0 to 50% by weight of a fibrous or particulate filler C) from 0 to 30% by weight of an elastomeric polymer D) from 0 to 30% by weight of other additives and processing aids, where the percentages by weight of components A) to D) together give 100%.Type: ApplicationFiled: February 28, 2007Publication date: January 8, 2009Applicant: BASF AktiengesellschaftInventors: Philippe Desbois, Gerd Blinne, Ralf Neuhaus, Hagen Stawitzki, Hans-Joachim Weis