Patents by Inventor Rutger Neeff
Rutger Neeff 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).
-
Patent number: 4294578Abstract: Use of compounds which, in the form of the free acid, correspond to the formula ##STR1## in which Z represents halogen or alkylcarbonylamino with 1-4 C atoms in the alkyl radical,m is 0, 1 or 2 andn, r and s represent the numbers 0 or 1 with the proviso that the sum of n, r and s has a value of 1 or 2 and s can be 1 only if r at the same time is 0,for dyeing polymeric materials containing amide groups, material dyed in this way and colorants containing the compounds of the indicated formula.Type: GrantFiled: March 15, 1979Date of Patent: October 13, 1981Assignee: Bayer AktiengesellschaftInventors: Friedrich W. Krock, Rutger Neeff
-
Patent number: 4294769Abstract: 2,3-Dicyano-anthraquinones of the formula ##STR1## wherein R denotes hydrogen, alkyl or cycloalkyl, are obtained in good yields and high purity by reacting compounds of the formula ##STR2## wherein X denoted hydrogen or the sulphonic acid group, with cyanides in formamide or N-methylformamide as solvents, and if appropriate oxidizing agents and heavy metal catalysts.Type: GrantFiled: July 24, 1980Date of Patent: October 13, 1981Assignee: Bayer AktiengesellschaftInventors: Friedrich W. Krock, Rutger Neeff, Heinz Scheiter
-
Patent number: 4290768Abstract: In order to dye and print cellulose fibres, which have been swollen with water-miscible swelling agents, or fibre mixtures containing such cellulose fibres, the fibres are treated with a dyestuff of the general formula ##STR1## wherein A denotes an optionally substituted anthraquinone radical, which can contain a further fused ring,X denotes oxygen or sulphur,Z denotes a mononuclear or binuclear aryl radical andn denotes 1 or 2,and the dyestuff is fixed by means of a heat treatment.Type: GrantFiled: January 7, 1980Date of Patent: September 22, 1981Assignee: Bayer AktiengesellschaftInventors: Rutger Neeff, Robert Kuth, Werner Kuhnel, Wilhelm Gohrbandt
-
Patent number: 4288362Abstract: Heterocyclic compounds of the formula ##STR1## wherein R.sub.1 denotes a substituent,R.sub.2 denotes an optionally substituted carbocyclic-aromatic or heterocyclic-aromatic radical andn denotes 0, 1, 2, 3 or 4, and azo colorants of the formula ##STR2## wherein D denotes the radical of an aromatic or hetero-aromatic amine which is free from sulphonic acid groups,p denotes an integer, preferably 1 or 2, andR.sub.1, R.sub.2 and n have the meaning mentioned in claim 1, processes for the preparation of the heterocyclic compounds and of the azo colorants, and the use of the azo colorants as pigments.Type: GrantFiled: May 29, 1979Date of Patent: September 8, 1981Assignee: Bayer AktiengesellschaftInventors: Meinhard Rolf, Rutger Neeff, Walter Muller
-
Patent number: 4285874Abstract: 1-Isocyanato-anthraquinones, which are valuable dyestuff intermediate products, are obtained in good yields when 1-amino-anthraquinones are introduced into phosgene or a solution of phosgene at -10.degree. to 50.degree. C., the reaction mixture is heated to 100.degree. to 200.degree. C. while passing phosgene through it and phosgene and hydrogen chloride are then expelled from the reaction mixture with an inert medium which is gaseous under the reaction conditions.Type: GrantFiled: September 12, 1979Date of Patent: August 25, 1981Assignee: Bayer AktiengesellschaftInventors: Rudolf Braden, Rutger Neeff
-
Patent number: 4284411Abstract: Anthraquinone derivatives which in one of their tautomeric structures correspond to the formula ##STR1## in which A denotes an anthraquinone radical which is free from sulphonic acid groups, is optionally further substituted and preferably consists of at most 5 fused rings,m is a number from 1-4 and preferably 1 or 2,R.sub.1 is hydrogen or a C.sub.1 -C.sub.4 -alkyl group andR.sub.2 is a cyano group or a radical of the formula ##STR2## or a radical of the formula ##STR3## in which formulae R.sub.3 is hydrogen, a straight-chain or branched alkyl group of a cycloalkyl radical,R.sub.4 is a substituent,n is 0, 1, 2, 3 or 4 andp is 0, 1, 2, 3, 4 or 5,processes for their preparation and their use for pigmenting organic macromolecular substances.Type: GrantFiled: July 19, 1979Date of Patent: August 18, 1981Assignee: Bayer AktiengesellschaftInventors: Rutger Neeff, Meinhard Rolf, Walter Muller
-
Patent number: 4278434Abstract: Dyestuffs of the formula ##STR1## wherein R represents C.sub.1 -C.sub.5 -alkyl which is optionally substituted by fluorine, chlorine, hydroxyl or methoxy,are outstandingly suitable for printing polymeric materials in accordance with the transfer printing principle in that they produce intensely colored prints on these materials, especially on polyester and polyamide fibre materials.Type: GrantFiled: February 11, 1980Date of Patent: July 14, 1981Assignee: Bayer AktiengesellschaftInventors: Friedrich W. Krock, Rutger Neeff, Robert Kuth
-
Patent number: 4264511Abstract: New anthraquinone compounds of the formula ##STR1## in which Y denotes chlorine, bromine, --O--R or ##STR2## R denotes aryl, R.sub.1 and R.sub.2 denote hydrogen, alkyl, cycloalkyl or aryl andX.sub.1 and X.sub.2 denote hydrogen, halogen or nitro,are obtained when the corresponding 2-sulphonic acids are treated with inorganic acid halides and the products are then optionally treated with alcohols or amines. The compounds I are valuable dyestuffs for dyeing polyester fibres and starting materials for the preparation of such dyestuffs.Type: GrantFiled: May 11, 1979Date of Patent: April 28, 1981Assignee: Bayer AktiengesellschaftInventors: Friedrich W. Krock, Rutger Neeff
-
Patent number: 4260540Abstract: Heterocyclic compounds of the formula ##STR1## wherein R.sub.1 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl or the two R.sub.1 s together denote CO,R.sub.2 denotes a substituent andn denotes 0, 1, 2, 3 or 4,processes for their preparation, azo pigments prepared therefrom by a coupling reaction with a diazo component of an aromatic or hetero-aromatic amine free from sulphonic acid groups, and the use of these azo pigments for pigmenting organic macromolecular materials and especially in the spin dyeing of polyacrylonitrile.Type: GrantFiled: March 20, 1979Date of Patent: April 7, 1981Assignee: Bayer AktiengesellschaftInventors: Meinhard Rolf, Rutger Neeff, Walter Muller
-
Patent number: 4246401Abstract: Azomethine pigments of the formula ##STR1## or of the tautomeric formula ##STR2## in which D denotes the radical of an aromatic or heteroaromatic amine which is free from sulphonic acid groups,R.sub.1 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl, in particular methyl, or both the R.sub.1, at the same time, denote CO,R.sub.2 denotes a substituent,m denotes an integer, preferably 1 or 2, andn denotes 0, 1, 2, 3 or 4,a processes for their preparation.Type: GrantFiled: March 19, 1979Date of Patent: January 20, 1981Assignee: Bayer AktiengesellschaftInventors: Rutger Neeff, Meinhard Rolf, Walter Muller
-
Patent number: 4225489Abstract: Heterocyclic compounds of the formula ##STR1## wherein R.sub.1 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl, or the two R.sub.1 s conjointly denote CO,R.sub.2 denotes a substituent andn denotes 0, 1, 2, 3 or 4 are suitable as coupling components for azo dyestuffs and especially for azo pigments of the formula ##STR2## wherein D denotes the radical of an aromatic or hetero-aromatic amine which is free from sulphonic acid groups andm denotes an integer, preferably 1 or 2, and R.sub.1, R.sub.2 and n have the abovementioned meaning.Type: GrantFiled: September 28, 1977Date of Patent: September 30, 1980Assignee: Bayer AktiengesellschaftInventors: Meinhard Rolf, Rutger Neeff, Walter Muller
-
Patent number: 4163747Abstract: Process for the preparation of 1-alkylamino-anthraquinones which comprises reacting 1-nitroanthraquinone with a monoalkylamine in the presence of an ether, a hydrocarbon or a mixture of an ether and a hydrocarbon. The 1-alkylamino-anthraquinones which are obtained can be employed directly as dyestuffs or used, without further purification, for the production of dyestuffs. Process of the invention results in the procurement of 1-alkylamine-anthraquinones of high purity and in high yield and avoids the formation of undesired by-products.Type: GrantFiled: September 22, 1978Date of Patent: August 7, 1979Assignee: Bayer AktiengesellschaftInventors: Bernd Schroeder, Rudolf Braden, Wolfgang Auge, Karl-Werner Thiem, Rutger Neeff
-
Patent number: 4102906Abstract: .alpha.-Amino-.beta.'-nitroanthraquinone is prepared by reacting .alpha.,.beta.'-dinitroanthraquinone with ammonia in an ether, an aliphatic, a cycloaliphatic or an optionally alkyl-substituted aromatic hydrocarbon, water or a mixture of the foregoing.Type: GrantFiled: May 7, 1976Date of Patent: July 25, 1978Assignee: Bayer AktiengesellschaftInventors: Wolfgang Auge, Karl-Werner Thiem, Rutger Neeff
-
Patent number: 4096111Abstract: Process for the bulk dyeing of synthetic linear polyesters, characterized in that one or more dyestuffs of the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 denote hydrogen or a non-ionic substituent, m denotes an integer from 0 to 2 and n denotes an integer from 1 to 4 and m and n together are not greater than 4, are employed.Type: GrantFiled: March 30, 1976Date of Patent: June 20, 1978Assignee: Bayer AktiengesellschaftInventors: Rutger Neeff, Heinz Dietrich Jordan
-
Patent number: 4035398Abstract: The invention relates to water-insoluble anthraquinone dye-stuffs of the formula ##STR1## wherein A denotes an optionally substituted cycloalkylene group,n and m denote numbers from 0 to 4 andZ.sub.1 and Z.sub.2 denote hydrogen or halogen.The dyestuffs are outstandingly suitable for dyeing synthetic fibre materials, such as those made of cellulose esters, polyamides and polyurethanes and above all those made of aromatic polyesters, according to conventional dyeing processes.Type: GrantFiled: November 11, 1975Date of Patent: July 12, 1977Assignee: Bayer AktiengesellschaftInventors: Friedrich Wilhelm Krock, Rudolf Braden, Rutger Neeff, Volker Hederich
-
Patent number: 4031116Abstract: Pure 1-nitroanthraquinone substantially free of dinitroanthraquinone is prepared by:1. Nitrating anthraquinone or a mixture which contains anthraquinone with at least 90% nitric acid at a temperature of at least 0.degree. C wherein the mole ratio of nitric acid to anthraquinone is less than 20 to 1;2. Stopping the reaction when the anthraquinone conversion is at least 50% by cooling the reaction mixture to a temperature of at most 20.degree. C and/or by adjusting the mole fraction of nitric acid in the reaction mixture to a value of at most 0.86;3. Precipitating 1-nitroanthraquinone by adjusting the mole fraction of nitric acid to a value of from 0.7 to 0.4 and/or by reducing the temperature to at most 20.degree. C; and4. Separating the precipitated 1-nitroanthraquinone and subjecting it to vacuum distillation.Type: GrantFiled: July 20, 1976Date of Patent: June 21, 1977Assignee: Bayer AktiengesellschaftInventors: Karl-Werner Thiem, Wolfgang Auge, Rutger Neeff
-
Patent number: 4017524Abstract: The invention is directed to the dyeing and printing of synthetic fiber materials from an aqueous medium with partially known dyestuffs of the formula ##STR1## wherein Y = C.sub.3 -C.sub.10 -alkylene group,X = oxygen or sulphur,Q = aralkyl andZ.sub.1 and Z.sub.2 = hydrogen or halogen as well as new dyestuffs of the above-indicated formula, wherein the aryl residue of the aralkyl group Q is substituted by at least one non-ionic substituent.Type: GrantFiled: June 27, 1975Date of Patent: April 12, 1977Assignee: Bayer AktiengesellschaftInventors: Friedrich Wilhelm Krock, Rutger Neeff
-
Patent number: 4014647Abstract: Exhaust process for the dyeing of synthetic fibre materials from organic water-immiscible solvents wherein are used as dyestuffs sulphonamide group containing disperse dyestuffs. There are obtained without originating waste waters dyeings with excellent fastness to washing, rubbing, light and sublimation.Type: GrantFiled: February 14, 1975Date of Patent: March 29, 1977Assignee: Bayer AktiengesellschaftInventor: Rutger Neeff
-
Patent number: 4003924Abstract: 1-Amino anthraquinone is prepared by reacting 1-nitro-anthraquinone with ammonia in water and/or an organic solvent and thereafter treating the 1-amino-anthraquinone imine formed with water thereby converting said imine into 1-amino anthraquinone.Type: GrantFiled: February 3, 1975Date of Patent: January 18, 1977Assignee: Bayer AktiengesellschaftInventors: Wolfgang Auge, Karl-Werner Thiem, Rutger Neeff, Paul Losacker, Rudolf Braden
-
Patent number: RE29577Abstract: Anthraquinone dyestuffs of the formula ##STR1## in which X.sub.1 denotes hydroxyl or amino, X.sub.2 denotes hydroxyl, amino, alkylamino, cycloalkylamino, arylamino, acylamino, alkylmercapto or arylmercapto, R denotes hydrogen, alkyl, aralkyl, cycloalkyl or aryl, Z denotes alkylene, Ac denotes acyl and Y denotes hydrogen or halogen, and in which the ring A can optionally by substituted by halogen, as well as their preparation and use for the dyeing of synthetic fibre materials. The dyed materials show good fastness to light and sublimation.Type: GrantFiled: January 4, 1977Date of Patent: March 14, 1978Assignee: Bayer AktiengesellschaftInventors: Volker Hederich, Friedrich Wilhelm Krock, Gunter Gehrke, Rutger Neeff