Patents by Inventor Reinhard Kuhn
Reinhard Kuhn 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: 5466791Abstract: The present invention relates to valuable monoazo dyes of the general formula I ##STR1## in which R is methyl or ethyl,R.sup.1 is methyl, ethyl, methoxyethyl or ethoxyethyl,R.sup.2 is methyl or ethyl, if n is equal to 0, and hydrogen, if n is equal to 1,R.sup.3 is methyl, ethyl, n-propyl or i-propyl andn is 0 or 1,to mixtures of dyes of the general formula I and to the preparation of these dyes and their mixtures and to their use for the dyeing of hydrophobic fiber materials.Type: GrantFiled: February 13, 1994Date of Patent: November 14, 1995Assignee: Cassella AktiengesellschaftInventors: Ulrich Buhler, Reinhard Kuhn, Margareta Boos
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Patent number: 5428138Abstract: The azo dyes of the formula I ##STR1## where X.sup.1 is for example hydrogen or (C.sub.1 to C.sub.6)alkyl,X.sup.2 is cyano or nitro,X.sup.3 is for example hydrogen or (C.sub.1 to C.sub.4)alkoxy,X.sup.4 is for example (C.sub.1 to C.sub.4)alkoxy, chlorine or hydrogen,R.sup.1 is hydrogen or (C.sub.1 to C.sub.6)alkyl,R.sup.2 is hydrogen or (C.sub.1 to C.sub.6)alkyl andR.sup.3 is for example (C.sub.1 to C.sub.8)alkyl,are highly suitable for dyeing and printing hydrophobic fiber materials.Type: GrantFiled: February 8, 1993Date of Patent: June 27, 1995Assignee: Cassella AGInventors: Ulrich Buhler, Margareta Boos, Reinhard Kuhn
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Patent number: 5288680Abstract: The present invention relates to a process for the preparation of finished dyeings of high fastness to thermomigration on fibre materials consisting completely or partly of polyester, characterized in that the material is dyed with one or more dyestuffs of the general formula I ##STR1## wherein R denotes linear (C.sub.1 -C.sub.3)-alkyl or (C.sub.3 -C.sub.6)-alkyl which is interrupted by an oxygen atom andR.sup.1 denotes (C.sub.1 -C.sub.4)-alkyl,and the dyeing thus obtained is then finished.Type: GrantFiled: May 22, 1992Date of Patent: February 22, 1994Assignee: Cassella AktiengesellschaftInventors: Rudolf Binder, Ulrich Buhler, Friedrich Schophoff, Margareta Boos, Reinhard Kuhn
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Patent number: 5207804Abstract: Coupling products of diazotized o- or p-toluidines to 3-hydroxy-2-naphthoic acid p-anisidide do not produce optimum dyeing properties in HT exhaustion dyeing of wound packages of synthetic fiber materials. Filtration occurs time after time under critical conditions, since these single dyestuffs and also mixtures of these with one another build up too slowly in the heating-up phase.A bright red multi-component system of the same color shade, which exhibits a significantly improved exhaustion capacity by synergism during HT dyeing of wound packages and no longer presents difficulties in respect of filtration, can be obtained by mixing monoazo dyestuffs which are obtained by coupling diazotized aniline and p-toluidine in each case to 3-hydroxy-2-naphthoic acid p-anisidide.Type: GrantFiled: April 20, 1992Date of Patent: May 4, 1993Assignee: Hoechst AktiengesellschaftInventors: Reinhard Kuhn, Margareta Boos, Rudolf Binder, Klaus Hofmann
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Patent number: 5174792Abstract: The invention relates to mixtures of monoazo dyes, which are characterized in that they consist of one or more dyes of the general formula I ##STR1## and one or more dyes of the general formula II ##STR2## where R.sup.1 is methyl, ethyl, n-propyl or i-propyl,R.sup.2 is ethyl or n-propyl,m is 2 or 3 andn is 1 or 2, with the proviso that m+n is 4,processes for preparing same and the use thereof for dyeing and printing hydrophobic fibre materials and blends thereof with natural fibre materials.Type: GrantFiled: August 12, 1991Date of Patent: December 29, 1992Assignee: Cassella AktiengesellschaftInventors: Hirotsugu Tsumura, Ulrich Buhler, Reinhard Kuhn, Margareta Boos
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Patent number: 5160495Abstract: Monoazo dyestuffs useful for dyeing and printing hydrophobic fibers have the formula ##STR1## in which R.sup.1 denotes alkyl having 1 to 3 carbon atoms, R.sup.2 and R.sup.3 independently of one another denote alkyl having 2 to 5 carbon atoms and R.sup.4 denotes methyl or ethyl.Type: GrantFiled: October 29, 1990Date of Patent: November 3, 1992Assignee: Cassella AktiengesellschaftInventors: Ulrich Buhler, Reinhard Kuhn, Margareta Boos
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Patent number: 5102425Abstract: The present invention relates to a process for the dyeing and printing of blended fabrics made of polyester and natural fibre materials, characterized in that the polyester portion of the blended fabric is dyed and printed using one or more disperse dyes of the general formula I ##STR1## in which R is methyl, ethyl or alkyl having 2 or 3 C atoms, which is substituted by alkoxy having 1 to 3 C atoms, andR.sup.1 is alkyl having 1 to 3 atoms.Type: GrantFiled: January 22, 1991Date of Patent: April 7, 1992Assignee: Cassella AktiengesellschaftInventors: Ulrich Buhler, Klaus Hofmann, Margareta Boos, Reinhard Kuhn
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Patent number: 5071443Abstract: The dyestuff mixture contains at least one dyestuff of the formula I ##STR1## and at least one dyestuff of the formula II ##STR2## wherein X and Y denote chlorine or bromine,R.sup.1 and R.sup.5 denote methyl or ethyl,R.sup.2 and R.sup.6 denote methyl, ethyl, n-propyl or i-propyl andR.sup.3, R.sup.4, R.sup.7 and R.sup.8 denote, for example, C.sub.1 - to C.sub.11 -alkyl, in the weight ratio of I:II=(5 to 95):(95 to 5), and is, for example, outstandingly suitable for dyeing synthetic fibres.Type: GrantFiled: March 5, 1990Date of Patent: December 10, 1991Assignee: Cassella AktiengesellschaftInventors: Ulrich Buhler, Hubert Kruse, Manfred Hahnke, Margareta Boos, Reinhard Kuhn
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Patent number: 4985044Abstract: Since anthraquinonoid disperse dyes of the dark blue and navy region give only a low color strength on synthetic fibers, there was an urgent need for their coloristically advantageous substitution by high performance blue azo dyes which are suitable for being used in the carrier dyeing process.According to the invention, the systematic development of multi-component mixtures based on selected blue azo dyes from the dicyano azo series makes it possible to avoid most of the disadvantages mentioned.Type: GrantFiled: June 7, 1989Date of Patent: January 15, 1991Assignee: Hoechst AktiengesellschaftInventors: Manfred Hahnke, Reinhard Kuhn, Ulrich Buhler
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Patent number: 4985043Abstract: Mixtures of monoazo dyes suitable for dyeing and printing hydrophobic fiber materials and mixtures thereof with natural fibers contain one or more dyes of the formula I ##STR1## and one or more dyes of the formula II ##STR2## in which Hal denotes bromo or chloro; R.sup.1 and R.sup.2, independently of one another, denote methyl or ethyl; R.sup.3, R.sup.4, R.sup.5 and R.sup.6, independently of one another, denote linear alkyl having 1 to 4 carbon atoms or alkenyl having 3 or 4 carbon atoms; and R denotes methyl, acetylamino, propionylamino, i-butyrylamino, or n-butyrylamino.Type: GrantFiled: March 15, 1989Date of Patent: January 15, 1991Assignee: Cassella AktiengesellschaftInventors: Ulrich Buhler, Manfred Hahnke, Reinhard Kuhn, Margarete Boos
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Patent number: 4950305Abstract: Hydrophobic textile materials can be dyed or printed with one or more monoazo dyes of the formula ##STR1## in which R.sup.1 is fluoro, chloro or bromo;R.sup.2 is hydrogen or chloro; andR.sup.3 is allyl, alkyl having 1 to 4 carbon atoms, alkoxyalkyl having 2 to 4 carbon atoms in the alkyl portion and 1 to 4 carbon atoms in the alkoxy portion or cyanoalkyl having 2 to 4 carbon atoms.Type: GrantFiled: August 7, 1989Date of Patent: August 21, 1990Assignee: Cassella AktiengesellschaftInventors: Ulrich Buhler, Margareta Boos, Reinhard Kuhn
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Patent number: 4872882Abstract: Dyeing formulations in solid or liquid form, containing one or more red disperse dyes of the general formula (1) ##STR1## where R.sub.1 denotes an alkyl group of 1 to 4 carbon atoms, and one or more red disperse dyes of the general formula (2) ##STR2## where R.sub.2 and R.sub.3 denote independently of each other the group --CH.sub.2 --CH.sub.2 --CH.sub.2 --COOCH.sub.3 or --CH.sub.2 --CH.sub.2 --CH.sub.2 --COOC.sub.2 H.sub.5 and R.sub.Type: GrantFiled: September 1, 1988Date of Patent: October 10, 1989Assignee: Hoechst AktiengesellschaftInventors: Manfred Hahnke, Reinhard Kuhn
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Patent number: 4851012Abstract: A mixture of monoazo dyestuffs which contains one or more dyestuffs of the formula I ##STR1## and one or more dyestuffs of the formula II ##STR2## wherein R.sup.1 and R.sup.2 independently of one another each denote linear or branched alkyl with 1 to 6 carbon atoms, R denotes linear or branched alkyl with 1 to 5 carbon atoms and Hal denotes chloro or bromo, are outstandingly suitable for dyeing and printing hydrophobic materials.Type: GrantFiled: February 1, 1988Date of Patent: July 25, 1989Assignee: Cassella AktiengesellschaftInventors: Ulrich Buhler, Hubert Kruse, Reinhard Kuhn, Margareta Boos
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Patent number: 4802889Abstract: Monoazo dyestuff of the formula ##STR1## wherein R.sup.1 is 4 alkyl having 1 to 3 carbon atoms, andR.sup.2 is methyl, ethyl or alkoxy having 1 to 4 carbon atoms hich is unsubstituted or substituted by methoxy or ethoxy is useful for dyeing and printing hydrophobic fibers a blue color.Type: GrantFiled: August 24, 1987Date of Patent: February 7, 1989Assignee: Cassella AktiengesellschaftInventors: Ulrich Bte,uml/u/ hler, Horst Tappe, Reinhard Kuhn, Albert Bode, Margareta Boss
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Patent number: 4750912Abstract: Polyester fibers which have a linear density of less than 0.1 den and a polyurethane content cannot be dyed in deep, bloomy blacks with the commercially available black and navy mixtures based on blue, yellow and red disperse dyes. This problem is overcome by using blue components which are derived from mixtures of selected disperse dyes of diazotized 1-amino-2,6-dicyano-4-nitrobenzene and coupling components from the series of specifically substituted N,N-dialkylanilines as a constituent for the trichromatic system.Type: GrantFiled: August 22, 1986Date of Patent: June 14, 1988Assignee: Hoechst AktiengesellschaftInventor: Reinhard Kuhn
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Patent number: 4689050Abstract: Disperse Blue 56 is an important blue dyestuff for dyeing PES fibers at the boil or under high-temperature conditions. This anthraquinonoid compound Disperse Blue 56, in addition to its advantages (high light fastness, pH/reduction insensitivity, purity of hue), has some technical disadvantages (poor leveling properties, pronounced staining of adjacent fiber, metameric red shift).By combining a plurality of blue disperse azo dyestuffs having selected structural features in the form of mixtures or mix-crystals it is possible to match the advantages of Disperse Blue 56 while substantially avoiding its disadvantages at the same time. These azo dyestuffs are based on coupling products of diazotized 2,6-substituted 4-nitroanilines with substituted N,N-dialkylanilines.Type: GrantFiled: December 20, 1985Date of Patent: August 25, 1987Assignee: Hoechst AktiengesellschaftInventors: Manfred Hahnke, Reinhard Kuhn, Reinhard Hahnle, Rudolf Schickfluss
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Patent number: 4678476Abstract: Synthetic fiber materials are effectively colored by dyeing or printing with a dyestuff mixture containing at least two separate dyestuffs (I) and (II) in a weight ratio of (I):(II) of from (20 to 99):(80 to 1) wherein:(I) is at least one dyestuff of the formula ##STR1## and (II) is at least one dyestuff of the formula ##STR2## in which X and Y are the same or different and each is independently chloro and bromo:R.sup.1 and R.sup.Type: GrantFiled: September 26, 1986Date of Patent: July 7, 1987Assignee: Cassella AktiengesellschaftInventors: Horst Tappe, Hubert Kruse, Reinhard Kuhn, Albert Bode, Margareta Boos
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Patent number: RE33908Abstract: Synthetic fiber materials are effectively colored by dyeing or printing with a dyestuff mixture containing at least two separate dyestuffs (I) and (II) in a weight ratio of (I):(II) of from (20 to 99):(80 to 1) wherein:(I) is at least one dyestuff of the formula ##STR1## and (II) is at least one dyestuff of the formula ##STR2## in which X and Y are the same or different and each is independently chloro and bromo:R.sup.1 and R.sup.Type: GrantFiled: February 19, 1991Date of Patent: May 5, 1992Assignee: Cassella AktiengesellschaftInventors: Horst Tappe, Hubert Kruse, Reinhard Kuhn, Albert Bode, Margareta Boos