Patents by Inventor Rolf Wurmb
Rolf Wurmb 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: 4367294Abstract: A process for the preparation of polyurethane foams modified with melamine-formaldehyde precondensates, in which the precondensates employed are storage-stable, aqueous 40-85% strength by weight resin solutions which are obtained by condensing melamine with formaldehyde in a molar ratio of 1:1.1-1.75 in aqueous solution at a pH which, at least periodically, is above 8, and at from 60 to 130.degree. C., until one part by volume of resin solution can be diluted with from 0.5 to 4 parts by volume of water at 20.degree. C. without causing a persisting cloudiness.Type: GrantFiled: May 22, 1981Date of Patent: January 4, 1983Assignee: BASF AktiengesellschaftInventors: Klaus Hahn, Peter Horn, Matthias Marx, Heinz Weber, Wolfram Weiss, Rolf Wurmb
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Patent number: 4324881Abstract: A process for the preparation of an amide-containing polyether comprises polycondensing a dihalobenzene compound, preferably bis-(4-chlorophenyl) sulfone or 4,4'-bis-(4"-chlorobenzoyl)-diphenyl ether, with an amide-containing bis-phenol of the formula HO-Ar.sup.1 -NHCO-Ar.sup.2 -CONH-Ar.sup.1 -OH where Ar.sup.1 is an aromatic radical of 6 to 12 carbon atoms and Ar.sup.2 is an aromatic radical of 6 to 12 carbon atoms or has the formula II ##STR1## where A.sup.1 is --SO.sub.2 --, --CO--, --C(CH.sub.3).sub.2 -- or 0 and n is 0 or 1, preferably 1,4-bis(4-hydroxybenzamido)-benzene, in the presence of an anhydrous alkali metal carbonate, and optionally in the presence of a bisphenol of the formula III ##STR2## where Ar.sup.1 and A.sup.1 have the above meanings and n and m are 0 or 1. The polyethers may be used to produce moldings, fibers, films, adhesives and coating materials.Type: GrantFiled: September 9, 1980Date of Patent: April 13, 1982Assignee: BASF AktiengesellschaftInventors: Gerd Blinne, Rolf Wurmb, Franz Schmidt
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Patent number: 4310632Abstract: A process for making a polyurethane which comprises reacting an organic polyisocyanate with a higher molecular weight organic polyhydroxyl compound in the presence of a catalyst having the following formula: ##STR1## wherein X is sulfur or NH and n is a whole number from 2 to 6. Also used is a catalyst which is a combination of the above-mentioned catalyst and an organic tin compound.Type: GrantFiled: January 26, 1981Date of Patent: January 12, 1982Assignee: BASF AktiengesellschaftInventors: Heinrich Horacek, Manfred Barl, Rolf Wurmb, Matthias Marx
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Patent number: 4279757Abstract: A process for separating hydrophobic organic liquids from water comprising passing a mixture of water and hydrophobic organic liquids through a column-like vessel which is filled with a hydrophobic, preferably open-celled, polyurethane foam, said foam having a high absorption capacity, permits high flow-through velocities even as the foam becomes covered and saturated with the hydrophobic organic liquids, is reversibly deformable, and can be reused.Type: GrantFiled: December 31, 1979Date of Patent: July 21, 1981Assignee: BASF AktiengesellschaftInventors: Gerard DeBeuckelaer, Wolfgang Jarre, Rolf Wurmb, Matthias Marx
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Patent number: 4260554Abstract: Storage-stable, liquid carbodiimide-modified polyisocyanates are prepared by condensation of polyisocyanates in the presence of catalytic amounts of phospholine, phospholidine, phospholine oxides and/or phospholidine oxides, said condensation terminated and the products stabilized by means of perchloric acid or trifluoromethanesulfonic acid.Type: GrantFiled: August 27, 1979Date of Patent: April 7, 1981Assignee: BASF AktiengesellschaftInventors: Rainer Ohlinger, Georg Falkenstein, Rolf Wurmb, Matthias Marx
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Patent number: 4237237Abstract: Hydrophobic polyurethane foams which have densities of from 4 to 15 g/liter and in which the number of closed cells is from 2 to 30%, and the number of open cells from 98 to 70%, based on the total number of cells, are obtained from polyisocyanates, polyhydroxy compounds, catalysts and water, with or without lipophilic compounds, the components being reacted in such amounts that the ratio of hydrogen atoms capable of undergoing a Zerewitinoff reaction to NCO groups is from 1.3 to 10:1. The foams are suitable for the absorption of oil and/or by hydrophobic solvents, which may or may not contain halogen, from water.Type: GrantFiled: April 30, 1979Date of Patent: December 2, 1980Assignee: BASF AktiengesellschaftInventors: Wolfgang Jarre, Rolf Wurmb
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Patent number: 4229553Abstract: Poly(alkylene terephthalate) molding materials which contain, as the stabilizer, a diepoxide of molecular weight from 200 to 2,000, and a catalyst which is an alkali metal salt of a chelating agent possessing one or more --N(CH.sub.2 --COO.sup.-).sub.2 groups in the molecule. Preferred catalysts are trisodium nitrilotriacetate and tetrasodium ethylenediaminetetraacetate. The molding materials may be used for the manufacture of moldings, films, monofilaments and fibers.Type: GrantFiled: July 12, 1979Date of Patent: October 21, 1980Assignee: BASF AktiengesellschaftInventors: Hans-Josef Sterzel, Rolf Wurmb, Franz Schmidt, 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: 4119767Abstract: In a secondary battery employing an aqueous lead salt solution as the electrolyte, salts of manganese, cobalt, nickel, copper, thallium, bismuth and/or antimony are additionally present in concentrations of from 0.1 to 100 mmole/l.Type: GrantFiled: April 1, 1977Date of Patent: October 10, 1978Assignee: BASF AktiengesellschaftInventors: Fritz Beck, Rolf Wurmb, Klaus Boehlke
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Patent number: 4107231Abstract: Flame-proofed linear polyesters containing, as flame-proofing agents, halogenated oligomeric styrenes and synergistic compounds.Type: GrantFiled: March 23, 1976Date of Patent: August 15, 1978Assignee: BASF AktiengesellschaftInventors: Rolf Wurmb, Wolfgang Seydl, Klaus Penzien, Hermann Gausepohl, Hans-Josef Sterzel
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Patent number: 4105624Abstract: Thermoplastic compositions based on mixtures of a vinyl chloride polymer and conventional reinforcing agents.The compositions contain a linear polyester, which is solid at room temperature and is compatible with the vinyl chloride polymer, as a processing assistant.The thermoplastic compositions may in particular be used for the manufacture of injection moldings.Type: GrantFiled: May 2, 1977Date of Patent: August 8, 1978Assignee: BASF AktiengesellschaftInventors: Klaus Boehlke, Martin Welz, Peter Foerster, Hans-Josef Sterzel, Rolf Wurmb, Hans G. Matthies
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Patent number: 4096318Abstract: An accumulator having an acid electrolyte and possessing two electrodes of the first kind mounted on base electrodes. The active material on the positive side contains manganese dioxide. The base electrode on the negative side consists of powdered graphite embedded in a binder which is resistant to the electrolyte. The base electrode on the positive side has a coarse porous structure and consists of graphite or titanium coated with titanium nitride or titanium carbide. The average pore diameters are from 0.1 to 2 mm and the pore volume is from 20 to 70%.Type: GrantFiled: April 14, 1977Date of Patent: June 20, 1978Assignee: BASF AktiengesellschaftInventors: Rolf Wurmb, Fritz Beck, Gerd Wunsch, Klaus Boehlke, Wolfram Treptow
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Patent number: 4092463Abstract: Secondary batteries with aqueous acid solutions of lead salts as electrolytes and inert electrode base plates also contain redox systems in solution. These systems have a standard potential of from -0.1 to +1.4 V relative to a standard hydrogen reference electrode, do not form insoluble compounds with the electrolytes and are not oxidized or reduced irreversibly by the active compositions applied to the electrode base plates, within their range of operating potentials.Type: GrantFiled: July 9, 1976Date of Patent: May 30, 1978Assignee: BASF AktiengesellschaftInventors: Rolf Wurmb, Fritz Beck, Klaus Boehlke
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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: 4048135Abstract: Thermoplastic, linear, saturated polyesters containing flameproofing agents consisting of halogen compounds and an antimony trioxide which has been prepared in an aqueous suspension of an inorganic support using an aqueous antimony(III) halide solution and adding an aqueous solution of a base to raise the pH to from 6 to 8 with precipitation of the antimony compound onto the support, followed by separation of the solids from the aqueous phase.Type: GrantFiled: March 8, 1976Date of Patent: September 13, 1977Assignee: BASF AktiengesellschaftInventors: Rolf Wurmb, Bernd Leutner, Wolfgang Seydl, Hans-Ulrich Schlimper, Hans-Josef Sterzel
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Patent number: 4043971Abstract: Thermoplastic polybutylene terephthalate molding compositions containing calcium sulfate and/or barium sulfate to increase the tracking resistance.Type: GrantFiled: April 21, 1976Date of Patent: August 23, 1977Assignee: BASF AktiengesellschaftInventors: Rolf Wurmb, Joachim Kunde, Johannes Schlag, Hans Georg Dorst
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Patent number: 4022752Abstract: Thermoplastic molding compositions based on polybutylene terephthalate having a relative viscosity of from 1.3 to 2.0, as measured in a phenol/o-dichlorobenzene mixture at 25.degree. C, and which contain, to increase the thermo-aging stability and toughness and also to improve the processing stability, from 0.1 to 10% by weight, based on the polybutylene terephthalate, of isocyanates or isothiocyanates and/or carbodiimides and/or compounds forming isocyanate groups or isothiocyanate groups and/or carbodiimide groups.Type: GrantFiled: April 14, 1975Date of Patent: May 10, 1977Assignee: BASF AktiengesellschaftInventors: Peter Horn, Rolf Wurmb, Dietrich Wolff, Wolfgang Seydl