Patents by Inventor Erwin Hahn
Erwin Hahn 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: 5560961Abstract: A process for the production of metal coated melamine-formaldehyde fibers is disclosed. Prior to coating, the fibers are first activated. Activation consists of applying a metal layer to the fibers by reducing a water soluble cobalt, copper or nickel salt with either: 1) a less noble metal or metal salt or 2) a hydride compound and a complexing agent. The desired metal coating is then applied to the pretreated fibers by reducing a water soluble salt of the metal with a reducing agent in the presence of a complexing agent.Type: GrantFiled: January 10, 1995Date of Patent: October 1, 1996Assignee: BASF AktiengesellschaftInventors: Joerg Adel, Bernd Ziegler, Erwin Hahn, Georg Mermigidis
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Patent number: 5470502Abstract: Fluorescent pigments have a mean particle size of from 8 to 16 lm and contain apolar polymer matrices based on polymethyl methacrylate, polystyrene, polybutadiene-modified polystyrene, polycarbonate, polyvinyl chloride or polyamide and one or more apolar fluorescent dyes of the coumarin or perylene series.Type: GrantFiled: February 8, 1994Date of Patent: November 28, 1995Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Werner Ostertag, Guenther Seybold
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Patent number: 5424461Abstract: A process for preparing 1-amino-4-hydroxyanthraquinone by treating 1,4-dihydroxyanthraquinone with ammonia in an aqueous medium comprises treating with ammonia in the presence of a base and of a catalytic amount of a reducing agent at from 60.degree. to 150.degree. C. and at from 1 to 30 bar.Type: GrantFiled: December 13, 1993Date of Patent: June 13, 1995Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Manfred Patsch, Heike Kilburg
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Patent number: 5421990Abstract: The production of shining shaped articles coated with zinc or a zinc alloy by electrodeposition of zinc or a zinc alloy from acidic aqueous electrolytic baths which contain as essential components one or more zinc salts and, where appropriate, salts of the other alloy metals, one or more conducting salts, one or more surfactants and one or more brighteners, entails employing as brighteners compounds of the formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.8 -alkoxy, phenoxy, benzyloxy, amino, C.sub.1 -C.sub.6 -alkylamino or di(C.sub.1 -C.sub.6)alkylamino,R.sup.2 is C.sub.1 -C.sub.4 -alkyl, phenyl, benzyl or the meanings of R.sup.1, andAr is phenyl or naphthyl which can additionally be substituted by one to three C.sub.1 -C.sub.4 -alkyl groups or C.sub.1 -C.sub.4 -alkoxy groups.Type: GrantFiled: November 9, 1993Date of Patent: June 6, 1995Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Bernhard Dung, Bernd Burkhart, Chung-Ji Tschang
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Patent number: 5410053Abstract: There are described rhodamine derivatives of the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl, or R.sup.2 is paired off with R.sup.5 or R.sup.4 with R.sup.6 to form 1,3-propylene, which can be substituted,R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each hydrogen or methyl,R.sup.9 is hydrogen, substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl or a radical of the formula (C.sub.2 H.sub.4 O--).sub.n H, where n is 2 or 3, andAn.sup..crclbar. is the equivalent of an anion derived from an addition or condensation polymer that contains acid groups, novel cyclic rhodamine dyes, and the use of the novel rhodamine derivatives and cyclic rhodamine dyes for dyeing polyacrylonitrile fibers, for incorporation into polymers or for preparing inks.Type: GrantFiled: March 16, 1994Date of Patent: April 25, 1995Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Claudia Kraeh, Udo Mayer, Bernhard Albert, Walter Denzinger
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Patent number: 5393828Abstract: A process for chemically degrading cured amino resins comprises reacting cured amino resins, which may contain fillers, with a primary and/or secondary amine at from 40.degree. to 250.degree. C.Type: GrantFiled: December 9, 1993Date of Patent: February 28, 1995Assignee: BASF AktiengesellschaftInventors: Juergen Weiser, Wolfgang Reuther, Erwin Hahn
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Patent number: 5382476Abstract: Cured aminoplast resins are recycled by a process in which said resins, which may contain fillers, are treated with an aqueous sulfite, hydrogen sulfite or disulfite solution and the resulting low molecular weight degradation products are used in chemical processes. The resulting low molecular weight degradation products of cured aminoplast resins are used for coating moldings, for tanning leather and skins and for the production of moldings which contain cured aminoplast resins or consist thereof.Type: GrantFiled: May 20, 1994Date of Patent: January 17, 1995Assignee: BASF AktiengesellschaftInventors: Juergen Weiser, Wolfgang Reuther, Erwin Hahn
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Patent number: 5371232Abstract: A process for preparing a compound of the formula I ##STR1## where R.sup.1 to R.sup.4 are each, independently of one another, hydrogen, alkyl, alkoxy, hydroxyl or halogen, comprises reacting a compound of the formula II ##STR2## with a compound of the formula III ##STR3## in the presence of sulfur or a sulfur donor at elevated temperature. The compounds prepared according to the invention are suitable, for example, as diazo components.Type: GrantFiled: July 30, 1993Date of Patent: December 6, 1994Assignee: BASF AktiengesellschaftInventors: Christoph Bomba, Guido Kuth, Paul Guenthert, Erwin Hahn
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Patent number: 5356938Abstract: Cured aminoplast resins are recycled by a process in which said resins, which may contain fillers, are treated with an aqueous sulfite, hydrogen sulfite or disulfite solution and the resulting low molecular weight degradation products are used in chemical processes. The resulting low molecular weight degradation products of cured aminoplast resins are used for coating moldings, for tanning leather and skins and for the production of moldings which contain cured aminoplast resins or consist thereof.Type: GrantFiled: February 15, 1994Date of Patent: October 18, 1994Assignee: BASF AktiengesellschaftInventors: Juergen Weiser, Wolfgang Reuther, Erwin Hahn
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Patent number: 5332830Abstract: N-Hydroxyazoles of the general formula I ##STR1## where A is ##STR2## and R.sup.1, R.sup.2 and R.sup.3 are each hydrogen, C.sub.1 -C.sub.4 -alkyl or halogen, are prepared by a process in which an azole of the general formula II ##STR3## where A, R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, is reacted with hydrogen peroxide or an alkyl peroxide in the presence of a zeolite catalyst at from -20.degree. to 150.degree. C. and from 0.1 to 150 bar.Type: GrantFiled: March 26, 1993Date of Patent: July 26, 1994Assignee: BASF AktiengesellschaftInventors: Klaus H. von Locquenghien, Wolfgang Hoelderich, Ulf Baus, Wolfgang Reuther, Erwin Hahn
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Patent number: 5306815Abstract: Azo dyes useful for dyeing or printing textile fibers or fabrics and for thermal transfer have the formula ##STR1## where R.sup.1 and R.sup.2 are each substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl or substituted or unsubstituted C.sub.3 -C.sub.4 -alkenyl or R.sup.1 may also be hydrogen,R.sup.3 is hydrogen or C.sub.1 -C.sub.6 -alkyl,R.sup.4 and R.sup.5 are each hydrogen, C.sub.1 -C.sub.6 -alkyl, halogen, C.sub.1 -C.sub.6 -alkoxy, amino or mono- or di(C.sub.1 -C.sub.4 -alkyl)amino, andD is a radical of the thiophene, thiazole, isothiazole, benzothiophene, thienothiophene or thienothiazole series.Type: GrantFiled: September 21, 1992Date of Patent: April 26, 1994Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Clemens Grund, Andreas Geisberger, Helmut Reichelt, Andreas Guldner, Mathias Wiesenfeldt, Karl-Heinz Etzbach, Ruediger Sens, Helmut Hagen
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Patent number: 5298610Abstract: Thiazoleazo dyes useful for dyeing or printing textile fibers have the formula ##STR1## where R.sup.1 is hydrogen, substituted or unsubstituted C.sub.1 -.sub.6 -alkyl, halogen, substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxy, substituted or unsubstituted C.sub.1 -C.sub.6 alkythio, substituted or unsubstituted phenylthio, C.sub.1 -C.sub.6 -alkylsulfonyl, substituted or unsubstituted phenylsulfonyl or C.sub.1 -C.sub.4 -alkoxycarbonyl,R.sup.2 is cyano, C.sub.1 -C.sub.4 -alkanoyl, benzoyl, C.sub.1 -C.sub.6 alkylsulfonyl, substituted or unsubstituted phenylsulfonyl or a radical of the formula --CH.dbd.T, where T is the radical of an acidic CH compound,R.sup.3 is hydrogen, substituted or unsubstituted C.sub.1 -.sub.6 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, carbamoyl or mono- or di-C.sub.1 -C.sub.4 -alkylcarbamoyl,R.sup.4 is C.sub.1 -C.sub.6 -alkyl, substituted or unsubstituted C.sub.1 -C.sub.6 -alkoxy, substituted or unsubstituted C.sub.1 -C.sub.Type: GrantFiled: June 4, 1992Date of Patent: March 29, 1994Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Matthias Wiesenfeldt, Helmut Reichelt, Sabine Gruettner-Merten
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Patent number: 5286854Abstract: Basic azo dyes useful for dyeing or printing polymeric material have the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkanoylamino,R.sup.2 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or a radical of the formula CO-X, andX is hydroxyl, C.sub.1 -C.sub.4 -alkoxy, amino, mono- or di(C.sub.1 -C.sub.6 -alkyl)amino or a radical of the formula ##STR2## where n is 0 or 1,R.sup.3, R.sup.4 and R.sup.5 are hydrogen or substituted or unsubstituted C.sub.1 -C.sub.4 -alkyl,R.sup.6 is hydrogen or C.sub.1 -C.sub.4 -alkyl,L is C.sub.2 -C.sub.6 -alkylene, andAn.sup..crclbar. is one equivalent of an anion,with the proviso that at least one basic or quaternary radical is present in the molecule.Type: GrantFiled: December 30, 1992Date of Patent: February 15, 1994Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Heidi Hengelsberg, Udo Mayer
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Patent number: 5286401Abstract: Heterocyclic compounds which are useful as bleach activators or optical brighteners in washing and cleaning agents have the formula ##STR1## where the variables have the following meanings: X is O, S or the group N--R.sup.3, where R.sup.3 is hydrogen, C.sub.1 -C.sub.25 -alkyll C.sub.1 -C.sub.25 -acyl or an aryl group of up to12 carbon atoms,Y is CH or N,R.sup.1 for X=S or N--R.sup.3 is hydrogen, a C.sub.1 -C.sub.25 -alkyl or C.sub.2 -C.sub.25 -alkenyl group or a phenyl radical which may be additionally substituted by one or two C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, hydroxyl, carboxyl, sulfo, amino, C.sub.1 -C.sub.4 -acylamino, nitro or cyano groups or chlorine or bromine atoms, which substituents, if there are two of them, may be identical or different,R.sup.1 for X=O is phenyl, o-, m- or p-tolyl, p-chlorophenyl, m-nitrophenyl, m-methoxyphenyl or m-methylsulfonylphenyl,R.sup.2 for X=S or N--R.sup.3 is hydrogen, a C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.Type: GrantFiled: March 3, 1992Date of Patent: February 15, 1994Assignee: BASF AktiengesellschaftInventors: Bernhard Dung, Wolfgang Trieselt, Erwin Hahn, Johannes Perner, Alfred Oftring
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Patent number: 5270456Abstract: Thiopheneazo dye I which are chiefly useful as disperse dyes for dyeing textile material, in particular polyesters, have the formula ##STR1## where the substituents are as defined in the description.Type: GrantFiled: July 10, 1991Date of Patent: December 14, 1993Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Guenter Hansen, Karl-Heinz Etzbach, Helmut Reichelt, Ernst Schefczik, Sabine Greuttner, Helmut Degen
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Patent number: 5256826Abstract: A process for the preparation of aromatic carbonyl or sulfonyl compounds with a diaryl ether structure by reacting phenols with halogenated carbonyl- or sulfonylaromatic compounds in a dipolar aprotic solvent is carried out in the presence of catalytic amounts of alkali metal nitrite or an aromatic nitro, nitroso, azo, azoxy or hydrazo compound.Type: GrantFiled: August 31, 1992Date of Patent: October 26, 1993Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Heinrich J. Eilingsfeld, Helmut Reichelt, Alexander Aumueller, Bernd Hupfeld
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Patent number: 5154763Abstract: Stabilized aqueous C.sub.14 -C.sub.22 -alkyldiketene emulsions containing, as essential components:(a) from 10 to 60% w/w of at least one C.sub.14 -C.sub.22 -alkyldiketene,(b) from 1 to 10% w/w of at least one protective colloid and(c) from 0.1 to 20% w/w of at least one ester of formula I ##STR1## in which R.sup.1 and R.sup.2 each denote C.sub.14 -C.sub.22 -alkyl, R.sup.1 differing in this case from R.sup.2 by at least 4 carbon atoms in the alkyl chain, and/or the same or different C.sub.14 -C.sub.22 -alkenyl groups, or at least one ester of the formula R.sup.3 --O--CO--O--R.sup.4 (II), in which R.sup.3 and R.sup.4 are alkyl or alkenyl radicals of from 2 to 22 carbon atoms or at least one urethane of formula III ##STR2## in which R.sup.5, R.sup.6 and R.sup.7 are the same or different alkyl or alkenyl radicals of from 2 to 22 carbon atoms and one of the substituents R.sup.5, R.sup.6 and R.sup.Type: GrantFiled: January 9, 1991Date of Patent: October 13, 1992Assignee: BASF AktiengesellschaftInventors: Peter Ksoll, Erwin Hahn, Peter Wittmer, Andreas Hohmann, Arnold De Clercq, Ulrich Riebeling
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Patent number: 5144064Abstract: J-Acid urea of the formula ##STR1## is prepared by reacting 7-amino-4-hydroxynaphthalene-2-sulfonic acid (J-acid) with urea at from 100.degree. to 140.degree. C. under a pressure ranging from atmospheric pressure to 10 bar in an inert solvent to a partial extent, precipitating unconverted J-acid in an acidic medium and separating it off, and, if desired, isolating J-acid urea from the resulting neutralized solution by salting out.Type: GrantFiled: September 23, 1991Date of Patent: September 1, 1992Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Udo Mayer, Friedrich-Wilhelm Raulfs, Ulrike Schloesser
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Patent number: 5131981Abstract: The wet-end coloring of paper with pigments and fixers is carried out by a process in which the pigment and fixer are added simultaneously to the paper pulp to be colored, and the fixer used is a cationic fixer, in an amount of from 0.01 to 3% by weight, based on the dry paper pulp to be colored.Type: GrantFiled: June 6, 1991Date of Patent: July 21, 1992Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Georg Henning, Manfred Mielke, Hans-Juergen Degen, Sigberg Pfohl
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Patent number: 5112362Abstract: Dye mixtures useful for dyeing or printing synthetic fabrics contain at least one azo dye whose diazo component is 2-amino-3,5-dicyano-4-methylthiophene and whose coupling component comes from the 2-amino-4-thienylthiazole series and also at least one azo dye whose diazo component is 2-amino-3,5-dicyano-4-methylthiophene, 2-amino-3-alkoxycarbonyl-5-cyano-4-methylthiophene or 2-amino-5-alkoxycarbonyl-3-cyano-4-methylthiophene and whose coupling component comes from the 3-cyano-4-methyl-2,6-diaminopyridine series, and/or at least one azo dye whose diazo component is a 2,6-dicyano-4-alkylaniline and whose coupling component comes from the m-phenylenediamine series.Type: GrantFiled: April 2, 1991Date of Patent: May 12, 1992Assignee: BASF AktiengesellschaftInventors: Erwin Hahn, Guenter Hansen, Gunther Lamm, Helmut Reichelt, Gerhard Wagenblast