Patents Assigned to BASF
  • Manufacture of 3-amino-2,1-benzisothiazoles
    Patent number: 3981883
    Abstract: Process for the manufacture of 3-amino-2,1-benzisothiazoles by oxidative ring closure of o-aminothiobenzamides, comprising the improvement of conducting the reaction in about 85 to 110% sulfuric acid which serves as solvent and oxidizing agent. 3-Amino-2,1-benzisothiazoles are important diazo components for blue azo dyes.
    Type: Grant
    Filed: March 6, 1975
    Date of Patent: September 21, 1976
    Assignee: BASF Aktiengesellschaft
    Inventor: Rolf Niess
  • Hair setting compositions containing easily removable neutralized copolymers
    Patent number: 3981987
    Abstract: Copolymers obtained by copolymerization of vinyl esters of aliphatic carboxylic acids and/or acrylic or methacrylic acid esters of aliphatic alcohols, with half-esters of ethylenically unsaturated dibasic carboxylic acids, followed by neutralization with bases, are used in hair setting compositions.
    Type: Grant
    Filed: January 8, 1975
    Date of Patent: September 21, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Linke, Karl Herrle, Wolfgang Schwarz, Johannes Perner
  • Process for the preparation of carbodiimide-isocyanurate foams
    Patent number: 3981829
    Abstract: Rigid cellular foam compositions characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of a catalytically sufficient amount of a catalyst system comprising (a) an alkanolaminotriazine, (b) a hexahydrotriazine, and (c) phenol or a substituted phenol.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: September 21, 1976
    Assignee: BASF Wyandotte Corporation
    Inventors: Moses Cenker, Thirumurti L. Narayan, Peter T. Kan
  • 4-Amino pyridazinium compounds having pharmacalogical properties
    Patent number: 3980633
    Abstract: New pyridazinium compounds which can be used as intermediates and are of interest because of their pharmacological properties, and their production.The invention relates to new pyridazinium compounds and their production. These compounds are of pharmacological interest.In DOS No. 1,912,941 6-alkoxypyridazinium compounds are said to have valuable pharmacological properties. Furthermore pyridazinium compounds are known for example as starting materials for pesticides and dyes from DOS No. 2,003,461 or U.S. Patent 3,510,488.The quaternization of pyridazines into pyridazinium compounds is described in an article in Acta. Chem. Scand., 21 (1967), 1067 to 1080, and the reaction of 6-chloropyridazinium compounds with amines is described in volume 23 (1969), 2534 to 2536.
    Type: Grant
    Filed: September 12, 1973
    Date of Patent: September 14, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Kropp, Franz Reicheneder, August Amann, Hubert Giertz
  • Mixtures based on ethylene copolymers and asphalt
    Patent number: 3980598
    Abstract: Mixtures of asphalt and ethylene copolymers, in which asphalts from solvent extraction processes are used as asphalt. Compared to conventional molding materials comprising mixtures of straight-run asphalts and ethylene polymers, the compositions according to the invention show no exudation of oil. The molding materials may be converted to sheeting and be used in roofing, as container lining or as pipe coating.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: September 14, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Moorwessel, Rudolf Glaser, Gunther Pfirrmann, Rudolf Konopka
  • Manufacture of methacrylic acid and butyrolactone
    Patent number: 3980670
    Abstract: Methacrylic acid and butyrolactone are manufactured by hydroformylation of allyl esters of lower carboxylic acids in the presence of rhodium catalysts and inert organic solvents, followed by oxidation of the resulting formyl compounds with molecular oxygen (e.g. with air) in the presence of lower fatty acids, without prior removal of the rhodium catalysts, and elimination of the carboxylic acid from the acyloxybutyric acids formed, at from 150.degree. to 500.degree.C, using catalysts such as aluminum oxide, silicates or active charcoal.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: September 14, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Kummer, Rolf Platz, Kurt Schwirten
  • Air guide for tape transports
    Patent number: 3979037
    Abstract: An apparatus for guiding a span of high speed magnetic tape past the recording/transducing head which utilizes a low volume lubricating air film to virtually eliminate the sliding friction between the guide itself and the magnetic tape. The periphery of the guide is slightly concave to permit the formation of an air film while permitting the tape to retain a desirable flat cross section and also facilitating a seal between the edges of the tape and the convex peripheral surface of the guide to isolate the lubricating air film from the atmosphere in order to reduce the supply of compressed air required. The design also enables the utilization of boundary layer air being dragged along by the tape to supplement the compressed air supply to further reduce the volume of air required.
    Type: Grant
    Filed: November 7, 1974
    Date of Patent: September 7, 1976
    Assignee: BASF Aktiengesellschaft
    Inventor: Donald L. Burdorf
  • Manufacture of a modified titanium component for Ziegler-Natta catalysts
    Patent number: 3977997
    Abstract: A process for the manufacture of a modified titanium-containing component of a Ziegler-Natta catalyst for the polymerization of C.sub.3-6 .alpha.-monoolefins, wherein a specific titanium-containing compound and a specific phosphorus-containing compound are dry-milled at a specific grinding acceleration in a vibratory ball mill. The characteristic feature of the process of the invention is that a mill is used which has a specific useful volume and the mill is initially charged with a specific amount of the titanium-containing compound, which is milled at a low temperature while the phosphorus-containing compound is gradually added, whereupon milling is continued while the temperature of the process material is gradually raised to a specific value and maintained at said value for a specific period of time, whereupon, if desired, milling is again continued at a lower temperature for a specific period of time.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: August 31, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Schick, Heinz Mueller-Tamm, Peter Hennenberger
  • Magnetic tape cartridge
    Patent number: 3977626
    Abstract: A magnetic tape cartridge having at least one tape pack contains liners which form guide channels for the outer turns of the pack and/or for magnetic tape being wound or unwound and also include resilient sections for locating the tape pack and/or the winding hub in the central plane of the cartridge. The magnetic tape cartridge of the invention can be used with particular advantage as a compact cassette beacause of its outstanding reliability in operation.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: August 31, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Gaiser, Gustav Loewenberg, Horst Fitterer, Uwe Woweries
  • Method of reducing the amount of cadmium capable of being extracted from calcined cadmium pigment powder by human gastric juices
    Patent number: 3977895
    Abstract: Acid-extractable cadmium in yellow, orange, or red cadmium pigments is reduced sharply without loss of tinctorial strength and other desirable pigment properties by suspending the pigment powder in water and adding approximately stoichiometric amounts of tin ions, preferably quadrivalent tin ions and sulfide ions, and recovering the solids from the mixture.
    Type: Grant
    Filed: November 26, 1975
    Date of Patent: August 31, 1976
    Assignee: BASF Farben & Fasern Aktiengesellschaft
    Inventors: Rolf Berger, Wolfgang Kuch, Hartmut Endriss
  • Manufacture of organic isocyanates
    Patent number: 3978105
    Abstract: Organic monoisocyanates and/or polyisocyanates are manufactured by reaction of primary organic amines with phosgene in the absence of organic solvents.
    Type: Grant
    Filed: January 23, 1975
    Date of Patent: August 31, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Fuchs, Rolf Platz, Volker Vogt
  • Production of 1-chloroanthraquinone
    Patent number: 3978096
    Abstract: 1-Chloroanthraquinone is produced by decarboxylation of 4-chloroanthraquinone-1-carboxylic acid in the presence of a carboxamide. The product is a starting material for the production of dyes, pest control agents and pigments.
    Type: Grant
    Filed: June 5, 1974
    Date of Patent: August 31, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Eilingsfeld, Manfred Patsch
  • Anodes for electrolysis
    Patent number: 3977959
    Abstract: An electrode for electrolysis which contains tantalum, tantalum boride, tantalum carbide or an alloy of tantalum with a metal of the iron group in addition to an alloy of tungsten with a metal of the iron group.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: August 31, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Habermann, Wolfgang Bruck, Werner Simmler
  • Manufacture of o-benzyltoluenes
    Patent number: 3978144
    Abstract: The manufacture of o-benzyltoluenes by reaction of o-xylyl halides with benzenes in the presence of boron trifluoride or its derivatives, and new o-benzyltoluenes. The new and known o-benzyltoluenes I manufactured by the process of the invention are starting materials for the manufacture of anthracene and anthraquinone and their derivatives.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: August 31, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Eilingsfeld, Manfred Patsch
  • Production of easily dispersible, high tinctorial strength perylene-3,4,9,10-tetracarboxylic acid diimides
    Patent number: 3976649
    Abstract: High tinctorial strength, easily dispersible perylene-3,4,9,10-tetracarboximides and N,N'-dialkylperylene-3,4,9,10-tetracarboximides are produced by introducing a finely ground crude pigment whose primary particle size is not more than 0.05 micron into a primary aliphatic or aromatic amine, into a heterocyclic base, into an aliphatic carboxamide, into a mixture thereof, or into from 75 to 84% by weight sulfuric acid and converting it into pigmentary form at a temperature of from ambient temperature to 160.degree.C. The products are easily dispersible pigments of high tinctorial strength.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: August 24, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Fabian, Klaus Schrempp
  • Herbicide mixture of lower alkyl esters of N-benzoyl-N-chlorophenyl-2-amino-lower alkanoic acids and 3-lower alkyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxides or salts thereof
    Patent number: 3976468
    Abstract: New and valuable herbicides containing mixtures, inter alia, of lower alkyl esters of N-benzoyl-N-chlorophenyl-2-amino-lower alkanoic acids and 3-lower alkyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxides or salts thereof.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: August 24, 1976
    Assignee: BASF Aktiengesellschaft
    Inventor: Adolf Fischer
  • Thermoplastic molding compositions of high impact resistance
    Patent number: 3975459
    Abstract: Thermoplastic molding compositions based on polyoxymethylene and containing, to improve the impact resistance, a block copolymer of a diene polymer block B and at least one poly(alkylmethacrylate) block A.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: August 17, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Schmidt, Gerhard Fahrbach, Wolfgang Schenk, Erhard Seiler
  • Manufacture of polymers of net-shaped structure
    Patent number: 3975339
    Abstract: A process for the manufacture of polymers of net-shaped crosslinked structure and with uniform length of the crosslinks. In this process, polyfunctional organoalkali metal compounds which have been manufactured by reaction of divinylbenzene with low molecular weight organoalkali metal compounds, are reacted direct, or after prior reaction with anionically polymerizable monomers, with bifunctional or polyfunctional coupling agents. The polymers of net-shaped crosslinked structure have macroporous properties and can be employed, for example, as gels in gel permeation chromatography or as carriers in the synthesis of peptides.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: August 17, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Walther Burchard, Helmut Eschwey
  • Particulate, expandable self-extinguishing styrene polymers showing good processability
    Patent number: 3975327
    Abstract: Particulate, expandable styrene polymers containing a flame-proofing organic halo compound as expanding agent and also a mixture of from 2.5 to 30% by weight of a hydrocarbon of from 3 to 6 carbon atoms and from 97.5 to 70% by weight of monofluorotrichloromethane, based on the total weight of said mixture serving as expanding agent, show good processability and exhibit self-extinguishing properties even during processing.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: August 17, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Nintz, Rupert Schick, Heinrich Horacek, Erhard Stahnecker
  • Herbicide mixtures of 3-lower alkyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxides and thiazoles
    Patent number: 3975179
    Abstract: Herbicide compositions of mixtures in the weight ratio of 5:1 to 1:5 of (a) 3-lower alkyl-2,1,3-benzothiadiazinone-(4)-2,2-dioxide or a salt thereof and (b) a compound of the formula ##EQU1## where R denotes a 5-chloro-4-methylthiazol-2-yl radical and X denotes lower alkyl.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: August 17, 1976
    Assignee: BASF Aktiengesellschaft
    Inventor: Adolf Fischer, deceased