Patents by Inventor Joachim Seibring
Joachim Seibring 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: 7897077Abstract: The invention relates to a process for pelletizing polymer melts, at above ambient pressure, in a pelletizing chamber into which a cutting apparatus has been inserted. In a first step, the pelletizing chamber is flooded with a gas which is inert toward the polymer melt and whose pressure is that at which the pelletizing process is carried out. The polymer melt is then injected into the pelletizing chamber. Finally, the gas is displaced from the pelletizing chamber via a liquid as soon as the polymer melt begins to flow through the cutting apparatus, this melt being cut into pellets.Type: GrantFiled: March 21, 2007Date of Patent: March 1, 2011Assignee: BASF SEInventors: Joachim Seibring, Jens Becker, Michael Kopietz, Theodor Bruckmann
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Publication number: 20090051061Abstract: The invention relates to a process for pelletizing polymer melts, at above ambient pressure, in a pelletizing chamber into which a cutting apparatus has been inserted. In a first step, the pelletizing chamber is flooded with a gas which is inert toward the polymer melt and whose pressure is that at which the pelletizing process is carried out. The polymer melt is then injected into the pelletizing chamber. Finally, the gas is displaced from the pelletizing chamber via a liquid as soon as the polymer melt begins to flow through the cutting apparatus, this melt being cut into pellets.Type: ApplicationFiled: March 21, 2007Publication date: February 26, 2009Applicant: BASF SEInventors: Joachim Seibring, Jens Becker, Michael Kopietz, Theodor Bruckmann
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Patent number: 6479572Abstract: Thermoplastic molding materials contain A) from 5 to 97.9% by weight of a polyphenylene ether B) from 1 to 93.9% by weight of a vinylaromatic polymer C) from 1 to 50% by weight of an elastomeric polymer D) from 0.1 to 10% by weight of a stabilizer mixture comprising d1) at least one sterically hindered phenol, d2) at least one phosphonite and d3) at least one alkyl aryl phosphite, E) from 0 to 70% by weight of a polyamide and F)from 0 to 60% by weight of further additives and processing assistants, the sum of the percentages by weight of components A) to F) being 100%.Type: GrantFiled: October 28, 1997Date of Patent: November 12, 2002Assignee: BASF AktiengesellschaftInventors: Martin Weber, Hans Joachim Reinhardt, Joachim Seibring
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Patent number: 6380306Abstract: Thermoplastic molding materials of A) from 72 to 88.5% by weight of a thermoplastic styrene or &agr;-methylstyrene polymer or copolymer, B) from 10 to 20% by weight of a first graft polymer having an average particle diameter d50 from 400 to 600 nm, having an n-butyl acrylate based rubber-elastic graft core, and a styrene or &agr;-methylstyrene (co)polymer graft shell, C) from 1.5 to 8% by weight of a second graft polymer having a bimodal particle size distribution, the average particle diameter d50 being from 25 to 200 nm and from 350 to 550 nm, having a butadiene or isoprene polymer or copolymer based rubber-elastic graft core, and a styrene or &agr;-methylstyrene (co)polymer graft shell, D) from 0 to 50% by weight of conventional additives, where the graft polymers B) and C) constitute from 11.5 to 25% by weight of components A), B) and C), and components A) to D) amount to 100% by weight.Type: GrantFiled: March 25, 1999Date of Patent: April 30, 2002Assignee: BASF AktiengesellschaftInventors: Peter Ittemann, Rainer Neumann, Joachim Seibring, Bernhard Rosenau, Manfred Kötting, Christophe Ginss, Norbert Güntherberg, Christian Meyer
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Patent number: 6323279Abstract: A thermoplastic molding composition having little intrinsic color is produced from a graft copolymer and a thermoplastic polymer. The graft copolymer is produced from a soft elastomeric particulate graft base obtained by polymerization of a conjugated diene alone or with a small amount of a monoethylenically unsaturated monomer, upon which is grafted a vinylaromatic monomer and acrylonitrile and optionally another monoethylenically unsaturated monomer. The thermoplastic polymer is a copolymer of a vinylaromatic monomer and acrylonitrile and optionally an additional monoethylenically unsaturated monomer. The thermoplastic molding composition has a low level of intrinsic color coupled with good mechanical properties and can be processed by, for example, extrusion, injection molding, calendaring, blow molding, compression molding, or sintering.Type: GrantFiled: December 30, 1999Date of Patent: November 27, 2001Assignee: BASF AktiengesellschaftInventors: Norbert Güntherberg, Jürgen Koch, Peter Ittemann, Joachim Seibring, Sven Grabowski, Graham Edmund McKee, Norbert Mosbach, Bernhard Czauderna, Norbert Niessner, Hartmut Heinen
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Patent number: 6194496Abstract: Flame-retardant thermoplastic molding materials containing A) at least one polyphenylene ether and B) at least one vinyl aromatic polymer, comprise C) as a flameproofing agent, a mixture of C1) at least one oligophosphonate or oligophosphate compound and C2) at least one phosphine oxide.Type: GrantFiled: November 5, 1998Date of Patent: February 27, 2001Assignee: BASF AktiengesellschaftInventors: Martin Weber, Joachim Seibring
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Patent number: 6028130Abstract: Flame-retardant thermoplastic molding compositions comprise A) at least one polyphenylene ether, andB) at least one vinylaromatic polymer, wherein the thermoplastic molding composition includesC) at least one oligomeric phosphorus compound as flame retardant andD) a mixture ofD.sub.1) at least one sterically hindered phenol andD.sub.2) at least one phosphonite as stabilizer,and are used to produce fibers, films and shaped articles.Type: GrantFiled: June 26, 1997Date of Patent: February 22, 2000Assignee: BASF AktiengesellschaftInventors: Martin Weber, Joachim Seibring
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Patent number: 5969016Abstract: Molding materials containA) from 5 to 97.9% by weight of at least one polycarbonate having a weight average molecular weight (M.sub.w) of from 10,000 to 64,000 g/mol,B) from 1 to 93.9% by weight of at least one graft copolymer,C) from 1 to 93.9% by weight of at least one copolymerc.sub.1) at least one vinylaromatic compound of the general formula I ##STR1## where R is hydrogen or C.sub.1 -C.sub.8 -alkyl, R.sup.1 is C.sub.1 -C.sub.8 -alkyl and n is an integer from 0 to 3, or of a C.sub.1 -C.sub.8 -alkyl acrylate, a C.sub.1 -C.sub.8 -alkyl C.sub.1 -C.sub.8 -alkylacrylate or a mixture thereof and c.sub.2) acrylonitrile, C.sub.1 -C.sub.8 -alkylacrylonitrile or a mixture thereof,D) from 0.01 to 10% by weight of at least one polyhydroxyether of at least one aliphatic or aromatic diol with epihalohydrin,E) from 1 to 25% by weight of at least one halogen-free phosphorus compound andF) from 0 to 50% by weight of additives.Type: GrantFiled: December 20, 1996Date of Patent: October 19, 1999Assignee: BASF AktiengesellschaftInventors: Martin Weber, Robert Weiss, Norbert Guntherberg, Klemens Massonne, Joachim Seibring, Guenther Zimmer
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Patent number: 5910553Abstract: In the preparation of a rubber-modified molding material, in a first stage, a first mixture (A) contains at least one alkyl acrylate or methacrylate (a) of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2 is alkyl of 1 to 32 carbon atoms, at least one first monomer (b) which forms free radicals on thermal decomposition and, if required, a second monomer (c) or a plurality thereof is polymerized, preferably with free radicals, to give a rubber (B),in a second stage, the resulting rubber (B) is mixed with a third monomer (d) or a plurality thereof, preferably dissolved or swollen therein, to form a second mixture (C), andin a third stage, the second mixture (C) is polymerized with free radicals to give the rubber-modified molding material (D).Type: GrantFiled: May 12, 1997Date of Patent: June 8, 1999Assignee: BASF AktiengesellschaftInventors: Graham Edmund McKee, Rainer Moors, Hermann Gausepohl, Joachim Seibring
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Patent number: 5013816Abstract: Particulate polymers of aromatic diols I and aromatic dihalogen compound II are prepared by(A) producing a plurality of liquid jets from a solution of the polymer by means of a nozzle,(B) causing the liquid jet to divide into particles of equal size,(C) precipitating the drops by introduction into a precipitation bath and(D) removing solvent residues and other impurities.Type: GrantFiled: December 16, 1987Date of Patent: May 7, 1991Assignee: BASF AktiengesellschaftInventors: Hendrikus Bobbink, Hermann Fischer, Gerhard Heinz, Klaus Matthias, Joachim Seibring, Wolfgang Stegmaier
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Patent number: 5008364Abstract: Thermoplastic molding materials which are stable at high temperatures and are based on polyaryl ether sulfones and, if required, polyether ketones have a content of alkali metal salts of not more than 100 ppm, based on total polymer.Type: GrantFiled: June 20, 1988Date of Patent: April 16, 1991Assignee: BASF AktiengesellschaftInventors: Peter Ittemann, Georg N. Simon, Gerhard Heinz, Hartmut Zeiner, Hermann Buchert, Joachim Seibring