Patents by Inventor Kurt Dahmen
Kurt Dahmen 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: 5433753Abstract: The present invention discloses the use of polymers which have built-in by polymerization 20 to 70%-wt. of a hydrophobic monomer selected from long-chain alpha-olefins, long-chain alkyl(meth)acrylates, vinyl esters of long-chain carboxylic acids, long-chain vinyl ethers, or mixtures of these monomers, 1 to 60%-wt. of a monomer with a specific polysiloxane group, and 20 to 35%-wt. water-soluble, unsaturated acids, unsaturated C.sub.4 -C.sub.6 dicarboxylic anhydrides, semi-esters or semi-amides of unsaturated C.sub.4 -C.sub.6 dicarboxylic acids, or mixtures of these monomers, in partially neutralized form as aqueous solution or dispersion, for softening, fat-liquoring and greasing, or hydrophobing leathers and furs.Type: GrantFiled: May 25, 1994Date of Patent: July 18, 1995Assignee: Chemische Fabrik Stockhausen GmbHInventors: Kurt Dahmen, Richard Mertens, Manfred Kaussen, Helmut Lohmann, Horst Kilian
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Patent number: 5409771Abstract: The present invention relates to a powdery, water-insoluble, cross-linked resin which absorbs aqueous or serous liquids as well as blood and is composed of a) 55 to 99.9%-wt. polymerized, unsaturated, polymerizable, acid-groups-containing monomers which are neutralized to the extent of at least 25 mol-%, b) 0 to 40%-wt. polymerized, unsaturated monomers copolymerizable with a), c) 0.1 to 5.0%-wt. of a cross-linking agent, and d) 0 to 30%-wt. of a water-soluble polymer, whereby the weight amounts a) to d) relate to anhydrous polymer. The polymer is characterized by the fact that the resin powder has been coated with 0.1 to 5%-wt. of an alkylene carbonate, relative to resin powder, and heated to a temperature of 150.degree. to 300.degree. C. The present invention further relates to a method of producing said polymer and to the use thereof in sanitary articles, such as diapers and the like, and in absorbent constructions consisting of hydrophilic fibers and absorbing resin.Type: GrantFiled: December 29, 1992Date of Patent: April 25, 1995Assignee: Chemische Fabrik Stockhausen GmbHInventors: Kurt Dahmen, Richard Mertens
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Patent number: 5408019Abstract: The invention relates to a cross-linked, water-absorbent polymer obtainable by the polymerization of a mixture consisting of a) 60-99%-wt. unsaturated, polymerizable monomers with acid groups which are neutralized to the extent of at least 30 mol-%, b) 0-37%-wt. monomers copolymerizable with a), c) 0.1-3.0%-wt. of a cross-linking agent and d) 0-10%-wt. of a water-soluble polymer, in which polymerization is conducted with a redox catalyst system containing formamidine sulfinic acid as reducing agent. The polymer is distinguished by a retention of greater than or equal to 28 g 0.9% aqueous NaCl-solution per 1 g of polymer, an absorption of greater than or equal to 26 g 0.9% aqueous NaCl-solution per 1 g of polymer at a load of 20 g/cm.sup.2 and a residual monomer content of less than 700 ppm, and preferably less than 500 ppm. The invention also relates to the use of this polymer in the production of hygiene articles.Type: GrantFiled: February 1, 1994Date of Patent: April 18, 1995Assignee: Chemische Fabrik Stockhausen GmbHInventors: Richard Mertens, Kurt Dahmen, Helmut Brehm
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Patent number: 5304664Abstract: To obtain highly sulfated fatty acids, hydroxy fatty acids or oxalkylated hydroxy fatty acids, the reaction mixture obtained from the sulfatation of unsaturated fatty acid esters and/or saturated hydroxy fatty acid ester and/or oxalkylated hydroxy fatty acid esters is neutralized, optionally separated from the brine, diluted with water and hydrolyzed at a temperature between 20.degree. C. and 160.degree. C. after addition of lye the amount of which at maximum is equivalent to the organically bonded sulfuric acid content. After phase separation from the non-sulfated starting products, the highly sulfated fatty acids are isolated from the aqueous phase.Type: GrantFiled: April 5, 1991Date of Patent: April 19, 1994Assignee: Chemische Fabrik Stockhausen GmbHInventors: Reinmar Peppmoller, Kurt Dahmen
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Patent number: 4774131Abstract: The present invention relates to a process for the production of textiles that are coated with polyurethane, in which the material that is to be coated is coated with two oppositely charged aqueous ionic dispersions of polyurethanes that contain no free isocyanate groups and contain covalently bonded, solubility-enhancing ionic groups, dried and optionally waterproofed. Cationic and anionic polyurethane dispersions are preferred in a weight ratio of 1:1, and are applied to the textile material in a two-coat technique, wet-on-wet. In addition, the invention relates to textile material produced in this way, with improved waterproof qualities and the use of such textiles for the production of breathable, water- and wind resistant clothing, industrial textiles, and leather substitutes, all of which are permeable to water vapour.Type: GrantFiled: October 2, 1987Date of Patent: September 27, 1988Assignee: Chemische Fabrik Stockhausen GmbHInventors: Kurt Dahmen, Dolf Stockhausen, Karl-Heinz Stukenbrock
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Patent number: 4693713Abstract: The invention concerns an absorbent for blood and serous body fluids consisting of at least two components, A and B, whereby component A is a crosslinked synthetic or natural polymer or copolymer, and component B is an organic and/or inorganic compound which is water-soluble and solid at normal temperature. The absorbent contains 25 to 98 weight % of component A and 2 to 75 weight % of component B. The invention, moveover, concerns the use of the said absorbent for absorption and/or retention of blood and serous body fluids, in particular in absorbent throwaway articles for surgical, medical and hygienic purposes.Type: GrantFiled: November 10, 1986Date of Patent: September 15, 1987Inventors: Miroslav Chmelir, Kurt Dahmen, Georg Hoffman, Georg Werner
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Patent number: 4663491Abstract: The invention relates to copolymers of esters of acrylic acid or methacrylic acid with unbranched alcohols that contain at least 16 C atoms, and maleic anhydride, and also the use of these copolymers as crystallization inhibitors in paraffin-bearing crude oils.Type: GrantFiled: June 4, 1985Date of Patent: May 5, 1987Assignee: Chemische Fabrik Stockhausen GmbHInventors: Eduard Barthell, Anthony Capelle, Miroslav Chmelir, Kurt Dahmen
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Patent number: 4644083Abstract: The present invention relates to a process for the production of N-substituted .alpha.,.beta.-unsaturated carboxylic acid amides, which proceeds from the .alpha.,.beta.-unsaturated carboxylic acid amide that is unsubstituted at the amido nitrogen, which forms the Michael adduct initially by conversion with a polyvalent alcohol having a boiling point of >/=150.degree. C., converts this with a primary or secondary amine with elimination of ammonia to form N-substituted carboxylic acid amide with a protected double bond, the polyvalent alcohol being subsequently eliminated from this product at high temperatures, with formation of the N-substituted .alpha.,.beta.-unsaturated carboxylic acid amide.Type: GrantFiled: January 25, 1985Date of Patent: February 17, 1987Assignee: Chemische Fabrik Stockhausen GmbHInventors: Kurt Dahmen, Erich Kuster, Richard Mertens, Helmut Brehm
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Patent number: 4631063Abstract: A process for the finish dressing of leathers dressed by a mineral or a combined method, by treatment with an aqueous solution of water soluble polymer dressing substances that are polymers of unsaturated monomers that contain sulfonic groups. These polymers contain, if necessary, additional basic units that do not affect the water solubility, these being derived from the comonomers that can be copolymerized with the monomers that contain the sulfonic groups and which do not contain phosphorus.Type: GrantFiled: April 8, 1985Date of Patent: December 23, 1986Assignee: Chemische Fabrik Stockhausen GmbHInventors: Dolf Stockhausen, Rudolf Nowak, Miroslav Chmelir, Manfred Kaussen, Kurt Dahmen
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Patent number: 4582933Abstract: This invention describes a process for the production of N-(tert-aminoalkyl)acrylamides by the reaction of acrylic acid with a suitable tertiary aminoalkylamine at a temperature of 150.degree.-230.degree. C. The aminoalkylamine and acrylic acid are reacted in equimolar quantities, preferably in the presence of an acidic or a basic catalyst.Type: GrantFiled: March 17, 1983Date of Patent: April 15, 1986Assignee: Chemische Fabrik Stockhausen GmbHInventors: Richard Mertens, Kurt Dahmen
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Patent number: 4528350Abstract: The invention relates to a process for the preparation of .alpha.,.beta.-unsaturated N-substituted carboxylic acid amides, novel .alpha.,.beta.-unsaturated N-substituted carboxylic acid amides, a process for the polymerization of these novel .alpha.,.beta.-unsaturated N-substituted carboxylic acid amides, including the polymers, and the use of these polymers as sedimentation, flocculating, dewatering and retention aids, as additives for mineral oils, and as ion exchangers.The .alpha.,.beta.-unsaturated N-substituted carboxylic acid amides are prepared by transamidation of .beta.-hydroxy or .beta.-alkoxy carboxylic acid amides with primary amines and heating of the N-substituted .beta.-hydroxy or .beta.-alkoxy carboxylic acid amides obtained as intermediate products in the vapor phase in the presence of catalysts. Primary amines are preferably used in the conversion which have no hydrogen beta to the amino group.These .alpha.,.beta.Type: GrantFiled: July 11, 1983Date of Patent: July 9, 1985Assignee: Chemische Fabrik Stockhausen & CieInventors: Bernhard Goossens, Erich Kuster, Kurt Dahmen, Eduard Barthell
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Patent number: 4408073Abstract: The invention relates to a process for the preparation of .alpha., .beta.-unsaturated N-substituted carboxylic acid amides, novel .alpha., .beta.-unsaturated N-substituted carboxylic acid amides, a process for the polymerization of these novel .alpha., .beta.-unsaturated N-substituted carboxylic acid amides, including the polymers, and the use of these polymers as sedimentation, flocculating, dewatering and retention aids, as additives for mineral oils, and as ion exchangers.The .alpha., .beta.-unsaturated N-substituted carboxylic acid amides are prepared by transamidation of .beta.-hydroxy or .beta.-alkoxy carboxylic acid amides with primary amines and heating of the N-substituted .beta.-hydroxy or .beta.-alkoxy carboxylic acid amides obtained as intermediate products in the vapor phase in the presence of catalysts. Primary amines are preferably used in the conversion which have no hydrogen beta to the amino group.These .alpha.,.beta.Type: GrantFiled: December 26, 1979Date of Patent: October 4, 1983Assignee: Chemische Fabrik Stockhausen & CieInventors: Bernhard Goossens, Erich Kuster, Kurt Dahmen, Eduard Barthell
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Patent number: 4318705Abstract: The invention relates to a process for improving the lightfastness of conventionally dyed leathers by treating the leathers before, during or after fatting with alkane and/or chloroalkane sulfonamides in amounts of about 0.1 to 8 weight percent, based on the shaved weight of the leather. Used as alkane sulfonamides and chloroalkane sulfonamides are preferably products with a chain length of about 10 to 35 carbon atoms and a chlorine content of about 10 to 40%. The alkane and/or chloroalkane sulfonamides are advantageously used in aqueous solution or in stable emulsion. A substantial improvement in lightfastness is obtained regardless of the type of the dye, tanning agent, fatting agent or other leather treating agent used.Type: GrantFiled: September 6, 1979Date of Patent: March 9, 1982Assignee: Chemische FabrikInventors: Rudolf Nowak, Kurt Dahmen, Dolf Stockhausen
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Patent number: 4312998Abstract: The invention relates to a process for the preparation of N-substituted acrylamides of the general formula ##STR1## wherein Y denotes a bivalent straight - or branched chain radical with 2 to 30, preferably 2 to 18, and particularly 2 to 6 carbon atom-, preferably a group of the formula (Y.sub.1).sub.m -(Y.sub.2).sub.n -(Y.sub.3).sub.t, in whichY.sub.1, Y.sub.2 and Y.sub.3 each stands for an alkylene group or the radical of a cyclic organic ring system with 5 or 6 carbon atoms, and the sum of m, n, and t is 2 or 3, and R.sub.1 denotes hydrogen or the radical of an amine of the formula N(R.sub.2) (R.sub.3),whereinR.sub.2 and R.sub.3 stand for alkyl radicals with 1 to 4 carbon atoms, which method is characterized in that dihydracrylic acid amide of the general formula ##STR2## is transmitted with amines of the general formulaH.sub.2 N--(Y)--R.sub.1 (III)with elimination of ammonia and the resulting N-substituted .beta.Type: GrantFiled: May 2, 1980Date of Patent: January 26, 1982Assignee: Chemische FabrikInventors: Erich Kuster, Bernhard Goossens, Kurt Dahmen, Eduard Barthell
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Patent number: 4297468Abstract: The invention relates to new cross-linked copolymers containing carboxyl groups and especially useful as thickening agents for aqueous and organic solvents, which copolymers contain(A) 20 to 100% by weight of olefinically unsaturated carboxylic acids,(B) 0 to 80% by weight of at least one mono-olefinically unsaturated monomer copolymerizable with the components A and C, and(C) 0.1 to 4% by weight, calculated on the total quantity of monomers, of allyl monomer of the general formula ##STR1## in which n=0, 1 or 2,m=1, 2 or 3, wherein n+m=3,R.sub.1 =hydrogen, or an alkyl, alkoxyalkyl, haloalkyl, cycloalkyl, aryl, alkaryl, aralkyl or alkenyl radical, andR.sub.2 and R.sub.3, which may be the same or different, each represents hydrogen or an allyl, alkyl, cycloalkyl, aryl, aralkyl or alkaryl radical,wherein at least two of the radicals R.sub.1, R.sub.2 and R.sub.3 must be an allyl radical or a substituted allyl radical.Type: GrantFiled: May 16, 1979Date of Patent: October 27, 1981Assignee: Chemische Fabrik Stockhausen & CieInventors: Miroslay Chmelir, Kurt Dahmen
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Patent number: 4286004Abstract: The present invention relates to rendering antistatic polyurethane foams, particularly polyurethane foams which are used as textile coating such as carpet backings. The antistatics are terminally esterified or etherified polyalkylene oxide adducts of the general formulaR--(CHR'--CH.sub.2 O)n--CHR'--CH.sub.2 R"in which R and R", which can be identical or different, denote a linear or branched alkoxy radical with 1 to 22 C atoms, an alkylaryloxy radical with 10 to 18 C atoms, an acyloxy radical with 1 to 18 C atoms or a halogen radical, R' denotes hydrogen or a methyl radical, and n denotes a whole number between 2 and 20. The antistatic finishing of the polyurethane foams is preferably effected by addition of the alkylene oxide adducts to the starting materials of the polyurethane foam. Preferably, the antistatic agents are dissolved in the diol component of the polyurethane. The so finished polyurethane foams have an antistatic content of 5 to 30 weight % relative to the polyurethane.Type: GrantFiled: May 7, 1980Date of Patent: August 25, 1981Assignee: Chemische FabrikInventors: Kurt Dahmen, Siegfried Pfabe
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Patent number: 4281186Abstract: The invention relates to acrylyl or methacrylyl ureas containing novel quaternary groups of the formula ##STR1## wherein X is hydrogen or a methyl group,R is a lower alkyl radical having from 1 to 4 carbon atoms,m is 0 or 1,n is an integer between 1 and 4, andZ is a salt-forming anion.The compounds are prepared from the corresponding halogen-substituted ureas by reaction with trialkylamines, preferably in a solvent. Because of their double bond, they can be polymerized to homopolymers and copolymers which are suited for use as flocculating, precipitating, dewatering and retention aids.Type: GrantFiled: December 18, 1979Date of Patent: July 28, 1981Assignee: Chemische Fabrik Stockhausen & CieInventors: Erich Kuster, Kurt Dahmen, Eduard Barthell
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Patent number: 4237067Abstract: Process for the manufacture of .alpha.,.beta.-unsaturated N-substituted carboxylic acid amides of the general formula ##STR1## in which R.sup.1 represents H or CH.sub.3R.sup.2 represents H or CH.sub.3, andY represents a divalent straight-chain or branched organic radical having 2-30 carbon atoms, andR.sup.3 represents H or the radical of an amine of the formula --N(R.sup.4)(R.sup.5), in which R.sup.4 and R.sup.5 represent alkyl radicals having 1 to 4 carbon atoms,by reacting .beta.-substituted carboxylic acid amides of the formula ##STR2## in which Z represents OH or the radical R.sup.6 O--, in which R.sup.6 is an alkyl radical having 1 to 4 carbon atoms,with amines of the general formulaH.sub.2 N--(Y)--R.sub.3 IIIat temperatures in the range of 100.degree. to 200.degree. C., preferably 120.degree. to 175.degree. C., with the elimination of ammonia, and heating the resulting N-substituted .beta.-hydroxycarboxylic or .beta.Type: GrantFiled: May 3, 1979Date of Patent: December 2, 1980Assignee: Chemische Fabrik Stockhausen & Cie.Inventors: Erich Kuster, Bernhard Goossens, Eduard Barthell, Kurt Dahmen
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Patent number: 4208184Abstract: As a leather fatting agent a solution, emulsion or dispersion of a pulverulent, free-flowing form product derived from a substance having a liquid or pasty consistency, especially fatty, oil and waxy substances, especially those prepared by drying aqueous solutions or dispersions containing these substances together with carrier compositions having the dry weight analysis of from 0.1 to 35% inorganic or organic salts, 0.1 to 90% albumin or albumin derivatives and 0.Type: GrantFiled: December 28, 1978Date of Patent: June 17, 1980Assignee: Chemische Fabrik Stockhausen & CieInventors: Rudolf Nowak, Kurt Dahmen, Eduard Barthell
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Patent number: RE33839Abstract: The invention concerns an absorbent for blood and serous body fluids consisting of at least two components, A and B, whereby component A is a crosslinked synthetic or natural polymer or copolymer, and component B is an organic and/or inorganic compound which is water-soluble and solid at normal temperature. The absorbent contains 25 to 98 weight % of component A and 2 to 75 weight % of component B. The invention, moveover, concerns the use of the said absorbent for absorption and/or retention of blood and serous body fluids, in particular in absorbent throwaway articles for surgical, medical and hygienic purposes.Type: GrantFiled: December 17, 1990Date of Patent: March 3, 1992Assignee: Chemische Fabrik Stockhausen GmbHInventors: Miroslav Chmelir, Kurt Dahmen, Georg Hoffman, Georg Werner