Patents by Inventor Rudolf Bermes
Rudolf Bermes 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: 6160169Abstract: A process for preparing amine salts of 4-nitrotoluene-2-sulfonic acid by sulfonation of nitrotoluene with oleum, subsequent dilution of the reaction mixture with water and extraction with lipophilic amines, wherein the acidic aqueous solution of the sulfonation product is partially neutralized with mineral bases. The compounds prepared according to the invention are particularly suitable for preparing dyes.Type: GrantFiled: December 7, 1998Date of Patent: December 12, 2000Assignee: BASF AktiengesellschaftInventors: Rudolf Bermes, Armin Haag, Hellmut Kast, Peter Krotzsch
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Patent number: 6036760Abstract: Aqueous liquid dye concentrates comprising, based on the weight of the concentrate, from 15 to 35% by weight of a dye quantity, from 90 to 100% by weight of the dye quantity consisting of the dye of the formula ##STR1## where Kat.sym. is the equivalent of a tertiary alkylalkanolammonium cation, are useful in the inkjet process.Type: GrantFiled: October 31, 1997Date of Patent: March 14, 2000Assignee: BASF AktiengesellschaftInventor: Rudolf Bermes
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Patent number: 5892105Abstract: A process for preparing amine salts of 4-nitrotoluene-2-sulfonic acid by sulfonation of nitrotoluene with oleum, subsequent dilution of the reaction mixture with water and extraction with lipophilic amines, wherein the acidic aqueous solution of the sulfonation product is partially neutralized with mineral bases.The compounds prepared according to the invention are particularly suitable for preparing dyes.Type: GrantFiled: December 9, 1997Date of Patent: April 6, 1999Assignee: BASF AktiengesellschaftInventors: Rudolf Bermes, Armin Haag, Hellmut Kast, Peter Krotzsch
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Patent number: 5847113Abstract: A process for preparing sulfo-containing copper phthalocyanine dyes having an absorption maximum .lambda..sub.max..gtoreq.605 nm comprises heating copper phthalocyanine with at least 15% strength oleum at about 50.degree.-110.degree. C. until the reaction product has a .lambda..sub.max..gtoreq.605 nm, then diluting the resulting sulfonation product with water, adding a tertiary, lipophilic amine and stirring at elevated temperature until the lipophilic phase comprising the ammonium salt separates from the aqueous sulfuric acid phase, subsequently admixing the lipophilic phase, optionally after washing with water, with a water-soluble base whose sulfonate salt is to be prepared and water, separating the resulting phases and leaving the salt in the aqueous solution or isolating it therefrom.The products are especially useful for dyeing cellulosic fibers or polyamides.Type: GrantFiled: October 10, 1997Date of Patent: December 8, 1998Assignee: BASF AktiengesellschaftInventor: Rudolf Bermes
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Patent number: 5770708Abstract: A process for preparing aqueous preparations of azo dyes of the formula ##STR1## where R is hydrogen or C.sub.1 -C.sub.4 -alkyl andKat.sym. is the equivalent of a cation which derives from a tertiary amine of the ethanolamine or propanolamine series,by diazotization of an aniline of the formula ##STR2## with neopentylglycol dinitrite in an aqueous medium and coupling of the resulting reaction mixture with .beta.-naphthol in the presence of a water-miscible diluent and of an amine comprises using an amine comprising a tertiary amine of the ethanolamine or propanolamine series.Type: GrantFiled: May 27, 1997Date of Patent: June 23, 1998Assignee: BASF AktiengesellschaftInventor: Rudolf Bermes
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Patent number: 5597905Abstract: Described is a process for preparing benzothiazolylazoanilines by diazotization of 2-aminobenzothiazoles in a mixture consisting essentially of phosphoric acid, sulfuric acid and water using customary diazotizing agents and subsequent addition of the reaction mixture to an aqueous acidic solution of the anilines.Type: GrantFiled: December 15, 1995Date of Patent: January 28, 1997Assignee: BASF AktiengesellschaftInventor: Rudolf Bermes
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Patent number: 5531797Abstract: Aqueous dye preparations contain from 12 to 30% by weight, based on the weight of the preparation and calculated as free acid, of a dye of the formula ##STR1## where L.sup.1 and L.sup.2 are each C.sub.1 -C.sub.4 -alkyl and Cat.sup..sym. is an alkali metal ion or an unsubstituted or substituted ammonium ion, and are used for coloring paper stocks.Type: GrantFiled: March 6, 1995Date of Patent: July 2, 1996Assignee: BASF AktiengesellschaftInventors: Rudolf Bermes, Walter Breitschaft
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Patent number: 5431723Abstract: Useful for the ink jet process are dye preparations which contain from 0.01 to 10% by weight, based on the weight of the preparation, of a dye quantity which is from 90 to 100% by weight the dye of the formula I ##STR1## where Kat.sym. is the equivalent of a metal or ammonium ion, from 0 to 15% by weight, based on the weight of the preparation, of one or more water-miscible organic solvents, and from 75 to 99.99% by weight, based on the weight of preparation, of water and which are essentially free of foreign salts, in the ink jet process.Type: GrantFiled: July 30, 1993Date of Patent: July 11, 1995Assignee: BASF AktiengesellschaftInventors: Rudolf Bermes, Rainer Dyllick-Brenzinger, Karin H. Beck
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Patent number: 5424403Abstract: Aminoazo dyes are prepared from the corresponding N-sulfomethylated aminoazo dyes by aqueous acid hydrolysis in the presence of amidosulfuric acid, urea or mixtures thereof.Type: GrantFiled: May 20, 1994Date of Patent: June 13, 1995Assignee: BASF AktiengesellschaftInventors: Rudolf Bermes, Heinz Keilhauer
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Patent number: 5173086Abstract: Aqueous solutions containing, each percentage being based on the weight of the aqueous solution,a) from 5 to 20% by weight of the dye of the formula ##STR1## (calculated as free acid) where cat.sup..sym. is a mixture of cations comprising from 5 to 50 mol % of lithium ions, from 5 to 40 mol % of diethanolammonium ions and from 20 to 90 mol % of triethanolammonium ions, andb) from 0 to 15% of urea, are useful for dyeing paper stock.Type: GrantFiled: September 12, 1991Date of Patent: December 22, 1992Assignee: BASF AktiengesellschaftInventor: Rudolf Bermes
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Patent number: 4804387Abstract: Aqueous dye mixtures for black shades containing as dyes essentially those dyes which have the C.I. number 19,140, 40,000 or 47,035, in the form of the alkanolammonium salt, and also the dyes of the formula I, II and/or III ##STR1## where the cations R.sup.+ are each independently of the others an alkanolammonium cation, a substituted or unsubstituted ammonium cation or an alkali metal cation, and the quantities of the individual dyes are such as to produce a black, are suitable in particular for dyeing paper and leather.Type: GrantFiled: November 27, 1987Date of Patent: February 14, 1989Assignee: BASF AktiengesellschaftInventors: Hans-Juergen Degen, Rudolf Bermes, Sigberg Pfohl
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Patent number: 4668789Abstract: Novel compounds of the formula I ##STR1## where Cat.sym. is a secondary or tertiary alkylammonium cation of 16 to 30 carbon atoms and the aromatic rings can be further substituted by chlorine, bromine, methyl, methoxy or nitro, are useful for the preparation of low-electrolyte powder and liquid formulations or for coloring organic media.Type: GrantFiled: December 13, 1984Date of Patent: May 26, 1987Assignee: BASF AktiengesellschaftInventor: Rudolf Bermes
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Patent number: 4560745Abstract: A process for the preparation of dyes which contain sulfonic acid groups and have a low electrolyte content, wherein an aqueous solution or suspension, which may or may not contain inorganic salts, of the dye containing sulfonic acid groups is(a) mixed with an amount, equivalent to the said dye, of a non-emulsifying, water-insoluble amine of a total of 12 to 40 carbon atoms, which forms, with the said dye, a salt which is sufficiently lipophilic for it to separate spontaneously from the aqueous phase,(b) the pH is brought to <5 with an acid and the batch is mixed thoroughly,(c) the two resulting phases of different density are separated, and(d) the phase which consists of the lipophilic ammonium salt of the dye is mixed, with or without prior washing with water, with a water-soluble base whose sulfonate salt is to be prepared, and with water, the resulting phases are separated, and the salt is left in the aqueous solution or is isolated therefrom.Type: GrantFiled: May 12, 1981Date of Patent: December 24, 1985Assignee: BASF AktiengesellschaftInventors: Volkmar Weberndoerfer, Friedrich Brunnmueller, Manfred Eisert, Rudolf Bermes
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Patent number: 4058517Abstract: Process of preparing a concentrated solution of a water-soluble anionic azo dye containing 1 to 4 sulfonic acid groups by diazotization and coupling of a diazo and coupling component, respectively, in the solvent or solvent mixture required for the concentrated solution which should have as essential solvents water and/or water-soluble or water-miscible organic solvents other than carboxylic acids. Diazotization is carried out with a nitrous acid ester of a hydroxy-substituted aliphatic hydrocarbon, e.g., an alkyl nitrite. The process provides highly stable concentrated or stock solutions of unlimited miscibility with water for use in continuous dyeing methods.Type: GrantFiled: February 21, 1973Date of Patent: November 15, 1977Assignee: Badische Anilin- & Soda-Fabrik AktiengesellschaftInventor: Rudolf Bermes