Patents by Inventor Rainer Theysohn
Rainer Theysohn 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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Publication number: 20020190425Abstract: A process is described for extrusion and/or injection molding of plastics of acrylonitrile-butadiene-styrene (ABS) type or of acrylonitrile-styrene-acrylate (ASA) type, which comprises using a magnesium oxide having a citric acid number of <1500 sec, preferably <800 sec, during the extrusion and/or injection molding, as additive. This process allows the formation of mold deposit during the processing of the plastics mentioned to be reduced to a minimum. The quality of the resultant moldings is increased. There is markedly less need for procedures to clean the processing machinery used.Type: ApplicationFiled: June 24, 2002Publication date: December 19, 2002Inventors: Peter Ittermann, Rainer Theysohn
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Patent number: 5304591Abstract: A thermoplastic molding composition composed of, based on the total of A, B, C and D,40-95% by weight of a copolymer A of, based on A,90-95% by weight of styrene and/or its derivatives and 10-50% by weight of acrylonitrile, optionally up to 50% by weight of a graft copolymer B of 20-80% by weight of a monomer mixture of either styrene/acrylonitrile in the ration from 9:1 to 4:6 or styrene/acrylonitrile/methylacrylate in the ration from 19:1:1 to 8:6:6 onto 80-20% by weight of an elastomer based on butadiene or acrylic ester as grafting base, graft copolymerization being effected in either emulsion or solution, 1-50% by weight of a reinforcing glass fiber material C and 0.1-50% by weight of a terpolymer D of styrene, methyl methacrylate and maleic anhydride composed of 1-15% by weight each of styrene and maleic anhydride and a styrene/maleic anhydride ratio of from 5:1 to 1:5, and methyl methacrylate.Type: GrantFiled: April 30, 1992Date of Patent: April 19, 1994Assignee: BASF AktiengesellschaftInventors: Bernhard H. Nowakowsky, Rainer Theysohn, Rainer Bueschl, Klaus Muehlbach, Graham E. McKee
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Patent number: 4847330Abstract: Thermoplastic molding materials contain, as essential components,(A) from 40 to 95% by weight of a nylon and(B) from 5 to 60% by weight of a noncrosslinked copolymer based on(a) from 55 to 79.5% by weight of ethylene,(b) from 20 to 40% by weight of one or more primary or secondary C.sub.2 -C.sub.8 -alkyl esters of acrylic acid or methacrylic acid,(c) from 0.49 to 8% by weight of a monomer having an acid functional group or a latent acid functional group, or of an epoxy-containing monomer of an ethylenically unsaturated monocarboxylic acid, and(d) from 0.01 to 2% by weight of an ethylenically unsaturated dicarboxylic acid or of an anhydride of such an acid.Type: GrantFiled: December 21, 1987Date of Patent: July 11, 1989Assignee: BASF AktiengesellschaftInventors: Christoph Plachetta, Horst Reimann, Rainer Theysohn, Franz G. Mietzner
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Patent number: 4837264Abstract: High-impact polyamide molding compositions contain as essential components(X) from 40 to 98% by weight, based on (X)+(Y), of a thermoplastic polyamide,(Y) from 2 to 60% by weight, based on (X)+(Y), of a rubberlike polymer which contains, as copolymerized units, an acrylic or methacrylic ester or an unsaturated carboxylic acid,(Z) from 0.001 to 2% by weight, based on (X)+(Y), of a metal compound selected from the group consisting of(Z.sub.1) salts of divalent, trivalent or tetravalent metals with C.sub.2 -C.sub.4 -carboxylic acids,(Z.sub.2) oxides of germanium or antimony and(Z.sub.3) alkyl orthotitanates and dialkyltin dilaurates.Type: GrantFiled: January 5, 1988Date of Patent: June 6, 1989Assignee: BASF AktiengesellschaftInventors: Franz Zahradnik, Karlheinz Ulmerich, Graham E. McKee, Horst Reimann, Richard Pflueger, Rainer Theysohn
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Patent number: 4574131Abstract: A process for the preparation of high-impact nylon molding materials, containing 30-88% by weight of a thermoplastic nylon, 10-50% by weight of an organosilane-coated silicate reinforcing filler, 0.1-5% by weight of a polyurethane ionomer, 2-30% by weight of a carboxyl-containing thermoplastic elastomer and, where appropriate, effective amounts of conventional additives, by mixing the silicate filler, coated with an organosilane and a polyurethane ionomer, with the thermoplastic elastomer and the nylon at above the melting point of the nylon, wherein, in a first stage, the silicate filler coated with an organosilane and a polyurethane ionomer is mixed with the nylon at above the melting point of the latter, and in a second stage the thermoplastic elastomer is finely dispersed in the filler-containing nylon at above the melting point of the latter.Type: GrantFiled: August 30, 1984Date of Patent: March 4, 1986Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Hans G. Dorst, Graham E. McKee, Rolf Steinberger, Walter Ziegler, Franz Zahradnik
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Patent number: 4554320Abstract: Novel nylon molding materials having high impact strength contain, as an additive, a copolymer of ethylene, a primary or secondary C.sub.2 -C.sub.8 -alkyl acrylate or methacrylate and a monomer possessing a (latent) acid functional group, in particular an ethylene/n-butyl acrylate/acrylic acid copolymer.Type: GrantFiled: February 13, 1985Date of Patent: November 19, 1985Assignee: BASF AktiengesellschaftInventors: Horst Reimann, Walter Ziegler, Franz Brandstetter, Rainer Theysohn, Richard Pflueger
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Patent number: 4540772Abstract: Nylons are prepared by a continuous process in which, in a precondensation zone, an aqueous solution of a salt of a dicarboxylic acid of 6 to 18 carbon atoms and a diamine of 6 to 18 carbon atoms is heated to 250.degree.-300.degree. C. under superatmospheric pressure, with simultaneous vaporization of water and formation of a prepolymer, the prepolymer and the vapor are separated, and the former is fed into a polycondensation zone and condensed under superatmospheric pressure of from 1 to 10 bar and at from 250.degree. to 300.degree. C., wherein the aqueous salt solution is condensed under superatomspheric pressure of from 1 to 10 bar in the first third of the tubular precondensation zone provided with baffles, until the degree of conversion is not less than 93%, and the prepolymer and the vapor phase are brought into intimate contact with one another in the remaining two thirds of the precondensation zone.Type: GrantFiled: June 15, 1984Date of Patent: September 10, 1985Assignee: BASF AktiengesellschaftInventors: Gunter Pipper, Franz Schmidt, Rainer Theysohn, Siegfried Riegger, Eduard Heil, Hermann Fischer, Richard Thoma, Paul Matthies
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Patent number: 4539391Abstract: Polylactams are prepared continuously by a process in which a lactam containing from 1 to 25% by weight of water is heated in a prepolymerization zone under a pressure of from 1 to 10 bar at from 220.degree. to 280.degree. C. for 1 to 10 minutes, water being vaporized at the same time, with the proviso that the degree of conversion on emergence from the prepolymerization zone is not less than 85%, the prepolymer and the vapor are separated continuously, and the prepolymer is passed into a polymerization zone and is polymerized further under superatmospheric pressure at from 240.degree. to 290.degree. C.Type: GrantFiled: February 21, 1984Date of Patent: September 3, 1985Assignee: BASF AktiengesellschaftInventors: Gunter Pipper, Rainer Theysohn, Franz Zahradnik
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Patent number: 4350652Abstract: A process for the preparation of finely divided polyolefin molding materials from 100 parts by weight of a polyolefin and from 0.01 to 30 parts by weight of an electrically conductive additive, with or without other additives, wherein the mixture of the finely divided polyolefin particles and the electrically conductive additives is brought to the crystallite melting point of the polyolefin by the heating effect of the mixing action, and is then brought to a temperature which is from 3.degree. to 40.degree. C. above the said crystallite melting point while being subjected to a defined mixing intensity, after which the mixture is either cooled within 120 seconds or is directly compression-molded.Type: GrantFiled: April 16, 1981Date of Patent: September 21, 1982Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Klaus Boehlke, Erhard Seiler, Martin Welz
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Patent number: 4314927Abstract: A flameproofed thermoplastic molding material which possesses good long-term stability and contains 100 parts of a nylon, 10-100 parts of an inorganic filler, 1-12 parts of red phosphorus and 1-40 parts of melamine cyanurate.The molding materials may be used to produce moldings, especially for electrical articles.Type: GrantFiled: May 27, 1980Date of Patent: February 9, 1982Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Horst Reimann
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Patent number: 4287117Abstract: A process for the preparation of finely divided polyolefin molding materials from 100 parts by weight of polyolefin and from 1 to 30 parts by weight of a conductive carbon black, with or without other additives, wherein the mixture of polyolefin powder and carbon black is compounded, in a first stage, until the crystallite melting point of the polyolefin is reached, and is then brought, in a second stage, to a temperature which is from 3.degree. to 40.degree. C. above the said crystallite melting point, after which the mixture is discharged from the mixer within from 0.5 to 30 seconds and is cooled within 120 seconds.Type: GrantFiled: December 28, 1979Date of Patent: September 1, 1981Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Gerhard Zeitler, Frank Weiss, Hans Willing, Erhard Seiler
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Patent number: 4146528Abstract: Thermoplastics reinforced with glass fiber mats contain from 10 to 60% by weight of such mats and from 5 to 60% by weight of a finely divided inert filler, the sum of the percentages by weight of glass fiber mats and filler being not greater than 70% by weight. The inert filler is a talc, having a foliated crystalline structure, which has a mean flake thickness of not more than 5 .mu.m and a ratio of mean flake diameter to mean flake thickness of from 5:1 to 500:1. When processing the thermoplastic filled with talc and glass fiber mats, homogeneous impregnation of the glass fiber mats with the filled thermoplastic is achieved.Type: GrantFiled: February 1, 1978Date of Patent: March 27, 1979Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Martin Welz, Rolf Wurmb
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Patent number: 4137212Abstract: A flameproofed nylon molding composition which can be processed by thermoplastic methods and which contains, as the flameproofing agent, from 5 to 30% by weight of brominated styrene oligomers and a synergistic metal oxide. The compositions may be used for the manufacture of injection moldings for the electrical industry.Type: GrantFiled: November 30, 1977Date of Patent: January 30, 1979Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Klaus Penzien, Wolfgang Seydl, Rolf Wurmb, Horst Reimann, Claus Cordes, Hans-Josef Sterzel
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Patent number: 4092284Abstract: Filled nylon molding compositions of increased rigidity containing red phosphorus as a flameproofing agent and talc or mica as a filler. They may be converted to moldings which are used, above all, in the electrical industry.Type: GrantFiled: October 12, 1976Date of Patent: May 30, 1978Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Rolf Wurmb, Wolfgang Seydl, Franz Zahradnik
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Glass-fiber-reinforced thermoplastic molding compositions showing improved flowability and toughness
Patent number: 4080349Abstract: Glass-fiber-reinforced thermoplastic molding compositions showing improved flowability and toughness and containing from 0.1 to 2% by weight, based on the total mixture, of a low molecular weight polyolefin wax to which from 2 to 50% by weight of polar side chains have been grafted.Type: GrantFiled: September 19, 1974Date of Patent: March 21, 1978Assignee: BASF AktiengesellschaftInventors: Rolf Wurmb, Dietrich-Wolfgang Mueller, Hans Georg Dorst, Klaus Bronstert, Rainer Theysohn -
Patent number: 4076682Abstract: Thermoplastic molding compositions comprise a linear nylon, an adduct of hexachlorocyclopentadiene and a dienophile as a flameproofing agent, zinc oxide as a synergistic agent, and reinforcing fillers. The zinc oxide is manufactured by adding an aqueous solution of a zinc salt and an aqueous solution of a base to an aqueous suspension of an inorganic carrier, the zinc oxide being precipitated at a pH of from 10 to 12. The molding compositions can be processed to give flameproof moldings having good mechanical properties.Type: GrantFiled: September 13, 1976Date of Patent: February 28, 1978Assignee: BASF AktiengesellschaftInventors: Rainer Theysohn, Rolf Wurmb, Bernd Leutner, Hans-Ulrich Schlimper
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Patent number: 3988284Abstract: Reinforced plastics containing an addition of from 0.05 to 2% w/w of a styrene oligomer.Type: GrantFiled: January 3, 1975Date of Patent: October 26, 1976Assignee: BASF AktiengesellschaftInventors: Rolf Wurmb, Joachim Kunde, Dieter Stein, Hermann Gausepohl, Rainer Theysohn