Patents by Inventor Gerhard Fahrbach
Gerhard Fahrbach 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: 6629653Abstract: The invention relates to a process for separating tenaciously elastic materials such as plastics and rubber from materials tearing and/or defiberizing under high mechanical stress, particularly paper, and to a device for performing said process. The process is characterized in that the mixture of materials to be separated is subjected to high radial, axial and tangential acceleration forces, whereby a mass flow of shredded fibrous material and a mass flow of substantially unshredded plastics is withdrawn separately. The device for performing the process consists of a screen basket which is cylindrical or preferably polygonal in shape and has borings in its jacket to let the defiberized material pass through, a rotatable driving shaft being arranged coaxially inside the screen basket, with blades being attached to said driving shaft, preferably in rigid connection.Type: GrantFiled: February 19, 1999Date of Patent: October 7, 2003Assignee: “Der Gruene Punkt” Duales System Deutschland AktiengesellschaftInventors: Gerhard Fahrbach, Heinz Reiner Schnettler
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Publication number: 20020079250Abstract: The invention relates to a process for separating tenaciously elastic materials such as plastics and rubber from materials tearing and/or defiberizing under high mechanical stress, particularly paper, and to a device for performing said process. The process is characterized in that the mixture of materials to be separated is subjected to high radial, axial and tangential acceleration forces, whereby a mass flow of shredded fibrous material and a mass flow of substantially unshredded plastics is withdrawn separately. The device for performing the process consists of a screen basket which is cylindrical or preferably polygonal in shape and has borings in its jacket to let the defiberized material pass through, a rotatable driving shaft being arranged coaxially inside the screen basket, with blades being attached to said driving shaft, preferably in rigid connection.Type: ApplicationFiled: February 19, 1999Publication date: June 27, 2002Inventors: GERHARD FAHRBACH, HEINZ REINER SCHNETTLER
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Patent number: 5969195Abstract: A process for hydrolyzing alkyl monohalides comprises using activated carbon impregnated with alkali metal hydroxide or alkaline earth metal hydroxide in the presence of water and converting the alkyl monohalides virtually quantitatively into the corresponding alcohols. Apparatus for carrying out the process comprises at least one, preferably two, especially three, reactors (2), especially tubular reactors. The process is also particularly useful for preparing alcohols.Type: GrantFiled: May 12, 1998Date of Patent: October 19, 1999Assignee: BASF AktiengesellschaftInventors: Uwe Stabel, Gerhard Fahrbach, Werner Neumann
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Patent number: 5908165Abstract: A process and apparatus for reprocessing mixed plastics, more particularly mixed plastics from household refuse. The material being reprocessed is shredded in a shredding stage, agglomerated in an agglomerator wherein volatile substances are sucked off by suction devices, and the agglomerated material is dried over a drying path. In order to reduce obstructive substances, such as paper and ash, the fine grain portion in particular of the plastics agglomerated is screened off. With the drying process it is possible to produce without wet processing steps which are high in energy consumption a plastics agglomerate of high quality which is suitable for industrial re-use.Type: GrantFiled: July 2, 1997Date of Patent: June 1, 1999Assignee: Der Gruene Punkt-Duales System Deutschland AktiengesellschaftInventors: Dietmar Guschall, Heiner Guschall, Axel Helmerth, Jorg Himmel, Gerhard Fahrbach, Heinz-Reiner Schnettler
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Patent number: 4724062Abstract: A layer of electrically conductive polymers is applied by a process in which carbon fibers of filaments or sheet-like structures of carbon fibers or filaments are coated with sulfonic acids of phthalocyanines or porphyrins, the filaments treated in this manner are made the anode in a solution which contains monomers from the class consisting of the 5-membered heterocycles, and the monomers are anodically polymerized so that a conductive layer is formed on the fibers, filaments or sheet-like structures.Type: GrantFiled: August 25, 1986Date of Patent: February 9, 1988Assignee: BASF AktiengesellschaftInventors: Herbert Naarmann, Franz Haaf, Gerhard Fahrbach
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Patent number: 4282334Abstract: A process for the manufacture of high impact and translucent polystyrene, in which, in a first stage, styrene is prepolymerized in mass or in solution in the presence of a rubber, and the polymerization is then completed in mass, in solution or in aqueous suspension. The prepolymerization is taken to a stage where the amount of styrene converted is from 3 to 10 times the amount of the elastomer constituent of the rubber, and at this conversion the disperse soft-component phase formed should have a mean particle size of less than 1 .mu.m and should contain from 35 to 65% by weight of free or chemically bonded polystyrene segments. The translucent styrene polymers of high impact strength may be used for packaging purposes.Type: GrantFiled: November 27, 1979Date of Patent: August 4, 1981Assignee: BASF AktiengesellschaftInventors: Manfred Walter, Dieter Stein, Gerhard Fahrbach, Rudolf Jung, Adolf Echte
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Patent number: 4207409Abstract: In the hydrogenation of polymers or copolymers synthesized from dienes, or containing diene hydrocarbons, which is as a rule carried out in an organic solvent using hydrogen in the presence of conventional complex hydrogenation catalysts based on metals of sub-group 8 of the periodic table of the elements and aluminum trialkyls it is important to have from 0.5 to 50 moles of water present in the hydrogenation zone per mole of the heavy metal component of the catalyst. The hydrogenation time can be substantially reduced by this measure.Type: GrantFiled: October 19, 1978Date of Patent: June 10, 1980Assignee: BASF AktiengesellschaftInventors: Volker Ladenberger, Klaus Bronstert, Gerhard Fahrbach, Wolfgang Groh
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Patent number: 4167545Abstract: Branched block copolymers of from 60 to 95 percent by weight of a monovinyl-aromatic compound and from 40 to 5 percent by weight of a conjugated diene.The branched block copolymers have a structure of the general formula(A.sup.1 --A.sup.2 --B.fwdarw.A.sup.3).sub.n --X--(A.sup.3 .rarw.B--A.sup.2).sub.mwhere the A's are non-elastomeric polymer segments based on the monovinyl-aromatic compound, the B's are elastomeric polymer segments based on the conjugated diene, X is the radical of an at least trifunctional coupling agent and n and m are numbers.The branched block copolymers may be used for the manufacture of highly transparent impact-resistant shaped articles, especially packaging materials.Type: GrantFiled: April 14, 1978Date of Patent: September 11, 1979Assignee: BASF AktiengesellschaftInventors: Gerhard Fahrbach, Karl Gerberding, Erhard Seiler, Dieter Stein
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Patent number: 4162919Abstract: Laminates for the manufacture of flexographic printing plates and containing (a) a layer consisting essentially of a photocrosslinkable mixture of a two-block copolymer of from 30 to 95% w/w of a diene hydrocarbon and from 5 to 70% w/w of a styrene monomer or a partially hydrogenated product thereof with a compatible monomer having at least one C--C double bond, said mixture containing a photo-initiator, (b) a non-photocrosslinkable elastomeric underlayer having a Shore A hardness of from 15 to 70 and (c) a non-photocrosslinkable stablizing layer preferably between layers (a) and (b).Type: GrantFiled: November 16, 1977Date of Patent: July 31, 1979Assignee: BASF AktiengesellschaftInventors: Peter Richter, August Wigger, Gerhard Fahrbach, Erhard Seiler, Helmut Barzynski
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Patent number: 4086298Abstract: Branched block copolymers of from 60 to 95 percent by weight of a monovinyl-aromatic compound and from 40 to 5 percent by weight of a conjugated diene. The copolymers have a structure of the general formula(A.sup.1 -B.fwdarw.A.sup.2).sub.n --X--(A.sup.2 .rarw.B).sub.mwhere the A's are non-elastomeric polymer segments based on the monovinyl-aromatic compound, the B's are elastomeric polymer segments based on the conjugated diene, X is the radical of an at least trifunctional coupling agent and n and m are numbers. The copolymers may be used for the manufacture of highly transparent impact-resistant shaped articles, especially packaging materials.Type: GrantFiled: October 15, 1976Date of Patent: April 25, 1978Assignee: BASF AktiengesellschaftInventors: Gerhard Fahrbach, Karl Gerberding, Erhard Seiler, Dieter Stein
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Patent number: 4066580Abstract: A process for the manufacture of urethane group containing polyisocyanurate foams produced by mixing polyisocyanates and polyols and (if required) frothing agents, auxiliaries and additives in the presence of a co-catalyst system which consists of a 1,3,5-tris(N,N-dialkylaminoalkyl)-s-hexahydrotriazine and an organic mono- or polycarboxylic acid, a polyesterol with an acid number greater than 4 or a mono-ester of polycarboxylic acid.Type: GrantFiled: June 7, 1976Date of Patent: January 3, 1978Assignee: BASF Wyandotte CorporationInventors: Georg Falkenstein, Gerhard Fahrbach, Harald Wulff
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Patent number: 4031166Abstract: Impact-resistant thermoplastic molding materials prepared from a rigid component and a soft component. The rigid component consists of polystyrene, the soft component consists of a mixture of a polyolefin with a copolymer of a vinylaromatic and a diene hydrocarbon which has been prepared by anionic solution polymerization and which may have been hydrogenated. The molding materials may be used for the production of molded parts for use in domestic appliances, automobiles and refrigerators.Type: GrantFiled: February 19, 1974Date of Patent: June 21, 1977Assignee: Badische Anilin- & Soda-Fabrik AktiengesellschaftInventors: Klaus Bronstert, Gerhard Fahrbach, Eduard Krahe, Volker Ladenberger, Ernst-Guenther Kastning, Hans Mittnacht, Herbert Willersinn, Hans-Georg Trieschmann
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Patent number: 4029720Abstract: A process for the manufacture of block or graft copolymers of polyalkylene oxides and vinylaromatic polymers or diene polymers. The block or graft copolymers are manufactured by reacting vinylaromatic polymers or diene polymers bearing methyl methacrylate end groups with polyalkylene oxides bearing alkali metal alcoholate end groups. The block or graft copolymers may be used as antistatic agents for plastics, as coating materials for non-woven webs, as intermediates in the manufacture of polyurethanes and as surfactants, protective colloids or emulsifiers.Type: GrantFiled: March 3, 1975Date of Patent: June 14, 1977Assignee: Badische Anilin- & Soda-Fabrik AktiengesellschaftInventors: Erhard Seiler, Gerhard Fahrbach, Dieter Stein
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Patent number: 4017558Abstract: Impact-resistant thermoplastic molding compositions containing from 70 to 98 percent by weight of a polyoxymethylene and from 30 to 2 percent by weight of a block copolymer of the general formula A -- B -- A, wherein A is a polyalkylene oxide block and B is a diene polymer block.Type: GrantFiled: February 13, 1975Date of Patent: April 12, 1977Assignee: BASF AktiengesellschaftInventors: Franz Schmidt, Gerhard Fahrbach, Wolfgang Schenk, Erhard Seiler
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Patent number: 4002703Abstract: This invention relates to a process for the manufacture of graft copolymers based on methyl methacrylate polymers. The methyl methacrylate polymer is reacted with a high molecular weight organic compound containing at least one alkylene oxide unit having an alkali metal alcoholate end group, during which reaction transesterification occurs to eliminate alkali metal methoxide and cause chain joining. The graft copolymers may be used for the production of shaped articles or coating compositions and as additives, antistatic agents or adhesion promoters for plastics materials.Type: GrantFiled: August 12, 1975Date of Patent: January 11, 1977Assignee: BASF AktiengesellschaftInventors: Gerhard Fahrbach, Erhard Seiler, Dieter Stein
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Patent number: 4001350Abstract: Block or graft copolymers consisting of a substantially linear elastomer block B and one or more copolymer blocks A of alternating structure. The ends of block B are joined to the blocks A by divinyl- or divinylidene-aromatic monomer units. The block or graft copolymers may be used as impact-resistant thermoplastic molding compositions for the manufacture of shaped articles or as emulsifiers in the solution graft polymerization of styrene and acrylonitrile to a rubber.Type: GrantFiled: December 30, 1974Date of Patent: January 4, 1977Assignee: BASF AktiengesellschaftInventors: Gerhard Fahrbach, Erhard Seiler, Karl Gerberding
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Patent number: 3978160Abstract: Manufacture of low molecular weight block copolymers of vinyl or diene monomers and alkylene oxides. In a first stage, the vinyl or diene monomers are polymerized as chain stopper, and in a second stage, one or two blocks A are added thereto by the addition of further alkylene oxide. The resulting block copolymers may be used as prepolymers for the manufacture of polyurethanes, as dispersing agents for dyes, as antistatic agents, emulsifiers, surfactants or as paper and textile finishing agents.Type: GrantFiled: July 30, 1973Date of Patent: August 31, 1976Assignee: Badische Anilin- & Soda-Fabrik AktiengesellschaftInventors: Erhard Seiler, Gerhard Fahrbach, Dieter Stein
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Patent number: 3975459Abstract: Thermoplastic molding compositions based on polyoxymethylene and containing, to improve the impact resistance, a block copolymer of a diene polymer block B and at least one poly(alkylmethacrylate) block A.Type: GrantFiled: April 14, 1975Date of Patent: August 17, 1976Assignee: BASF AktiengesellschaftInventors: Franz Schmidt, Gerhard Fahrbach, Wolfgang Schenk, Erhard Seiler
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Patent number: 3933774Abstract: Modified copolymers of vinyl aromatic compounds or diene hydrocarbons with diisopropenylbenzene. They contain at least 0.2% of polymerized units of a group of the general formulaThe copolymers are intermediates in the manufacture of block copolymers and graft copolymers suitable for use as impact-resistant plastics or polymeric antistatic agents.Type: GrantFiled: March 21, 1974Date of Patent: January 20, 1976Assignee: BASF AktiengesellschaftInventors: Franz Neumayr, Gerhard Fahrbach, Erhard Seiler
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Patent number: 3933943Abstract: This invention relates to a process for the manufacture of graft copolymers based on methyl methacrylate polymers. The methyl methacrylate polymer is reacted with a high molecular weight organic compound containing at least one alkylene oxide unit having an alkali metal alcoholate end group, during which reaction transesterification occurs to eliminate alkali metal methoxide and cause chain joining. The graft copolymers may be used for the production of shaped articles or coating compositions and as additives, antistatic agents or adhesion promoters for plastics materials.Type: GrantFiled: October 24, 1973Date of Patent: January 20, 1976Assignee: BASF AktiengesellschaftInventors: Gerhard Fahrbach, Erhard Seiler, Dieter Stein