Patents Assigned to BASF
  • Preparation of aromatic aldehydes by the Sommelet reaction
    Patent number: 4321412
    Abstract: In a process for the preparation of aromatic monoaldehydes by reacting monochlorinated methylaromatics with hexamethylenetetramine by a Sommelet reaction, the improvement that in place of pure chloromethylaromatics the chlorination mixtures produced by photochlorination of the methylaromatics are employed and are treated with hexamethylenetetramine without prior working up, after which the Sommelet reaction is allowed to take place.
    Type: Grant
    Filed: October 15, 1980
    Date of Patent: March 23, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Schoch, Michael Kroener, Rudi Widder
  • Pressure device for flexible recording media in cartridges using a universal joint mounting
    Patent number: 4320429
    Abstract: A pressure device for flexible recording media, especially those contained in cartridges, which comprises a rigid member provided with a resilient pad, which member, secured to a pivoted lever, is located in front of the write/read area of the scanning head relative to the direction of rotation of the recording medium, and presses the recording medium against a platen, wherein the rigid member is connected to the pivoted lever via a universal joint.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Knerich, Udo Boehm, Klaus Schulze-Berge, Roland Brotzler
  • Magnetic recording media containing elastomeric polyurethane binders in the magnetic coating
    Patent number: 4320171
    Abstract: Magnetic recording media comprising a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on a finely divided magnetic pigment dispersed in a binder which contains at least 50 percent by weight of a special polyurethane elastomer, namely a thermoplastic polyurethane which is soluble in tetrahydrofuran, is free from isocyanate groups and has been manufactured from (A) 1 mole of a hydroxyl-containing polyester having a molecular weight of from 700 to 2,500, (B) from 0.3 to 3 moles of a linear aliphatic diol of 2 to 10 carbon atoms, (C) from 0.05 to 0.4 mole of a triol of 3 to 10 carbon atoms, and (D) from 1.35 to 4.7 moles of a diisocyanate of 6 to 30 carbon atoms, the amount of NCO groups being approximately equivalent to the amount of OH groups of the sum of components (A) to (C).
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Motz, August Lehner, Heinrich Hartmann, Rudolf Bachmann, Hans-Joerg Hartmann, Harald Frischmann, Roland Falk, Joachim Hack, Milan Velic, Helmut Kopke
  • Process for conjointly preparing methyl tert.-butyl ether and obtaining isobutene
    Patent number: 4320232
    Abstract: A process for conjointly preparing methyl tert.-butyl ether and obtaining isobutene from an isobutene-containing C.sub.4 -hydrocarbon mixture. In the process the C.sub.4 -hydrocarbon mixture is reacted, in one or more etherification stages, with methanol and a primary C.sub.3 - or C.sub.4 -alcohol in the presence of an acid condensing agent, the resulting reaction mixture or mixtures are then separated into a fraction containing the unconverted hydrocarbons, the methyl tert.-butyl ether and a fraction containing the C.sub.3 - or C.sub.4 -alkyl tert.-butyl ether. Thereafter, the C.sub.3 - or C.sub.4 -alkyl tert.-butyl ether is decomposed at an elevated temperature, in the presence of an acid catalyst, into isobutene and primary C.sub.3 - or C.sub.4 -alcohol.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Volkamer, Alfred Lindner, Franz Merger, Ulrich Wagner, Erwin Brunner, Gerhard Sandrock, Max Strohmeyer
  • Preparation of 1-(aralkyl)-2-naphthols
    Patent number: 4320235
    Abstract: 1-(Aralkyl)-2-naphthols are prepared by reacting a 2-naphthol with a styrene in the presence of a carboxylic acid.The 1-(aralkyl)-2-naphthols obtainable by the process according to the invention are valuable starting materials for the preparation of dyes, pest control agents, drugs, ointments, emulsifiers, dispersants, stabilizers, hydraulic fluids, plasticizers, corrosion inhibitors, disinfectants, crop protection agents and scents.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Gerhard Nestler
  • Photopolymerizable compositions containing elastomers and photo-curable elements made therefrom
    Patent number: 4320188
    Abstract: Photopolymerizable compositions based on an elastomeric styrene-diene block polymer, one or more photopolymerizable olefinically unsaturated monomers and one or more photopolymerization initiators exhibit improved properties if they contain, as an essential constituent, an elastomeric block copolymer of the general structure A-B-C, where A is a thermoplastic, non-elastomeric polymer block based on styrene compounds and having a second order transition point above +25.degree. C., B is an elastomeric polymer block based on butadiene and/or isoprene and having a second order transition point below -20.degree. C. and C is a polymer block, different from B, having a second order transition point of from -30.degree. C. to +15.degree. C., C being either a homopolymer or copolymer block based on butadiene or isoprene or a random copolymer block based on conjugated dienes and styrene compounds.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Heinz, Peter Richter, Mong-Jon Jun
  • Preparation of olefinically unsaturated carbonyl compounds and alcohol
    Patent number: 4320228
    Abstract: Olefinically unsaturated carbonyl compounds R.sup.1 --CHR.sup.2 --CHR.sup.3 --C(R.sup.4)O (I) and alcohols R.sup.1 --CHR.sup.2 --CHR.sup.3 --CH(R.sup.4)--OH (II) (where R.sup.1 is an olefinically unsaturated organic radical, and R.sup.2, R.sup.3 and R.sup.4 are H or C.sub.1 -C.sub.4 -alkyl) are prepared by hydrogenating the carbonyl compounds R.sup.1 --CR.sup.2 .dbd.CR.sup.3 --C(R.sup.4)O (III) in the liquid phase with hydrogen, using a catalyst system comprising, firstly, Pd and, secondly, Ru, Rh, Os, Ir or Pt, in the presence of from 5 to 40% by weight, based on (III), of a tertiary amine, under a hydrogen pressure of from 1 to 20 bar is predominantly (I) is to be obtained and from 20 to 150 bar if predominantly (II) is to be obtained.The process is of particular importance for the hydrogenation of citral (IIIa) to give citronellal (Ia) or citronellol (IIa), the preferred amine being trimethylamine.
    Type: Grant
    Filed: July 8, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Horner, Matthias Irgang, Axel Nissen
  • Preparation of 5-(2,2,2-trihaloethyl)-dialkyl-tetrahydrofuran-2-ones
    Patent number: 4320062
    Abstract: Preparation of 5-(2,2,2-trihaloethyl)-4,4-dialkyl-tetrahydro-furan-2-ones of the formula I ##STR1## where R.sup.1 and R.sup.2 are each alkyl of 1 to 4 carbon atoms and X is halogen, by reacting a carboxylic acid amide of the formula II ##STR2## where R.sup.3 and R.sup.4 are each alkyl of 1 to 4 carbon atoms, aralkyl of 7 to 9 carbon atoms or aryl of 6 to 10 carbon atoms or together with the nitrogen on which they are present as substituents form a 5-membered or 6-membered saturated ring which may contain a second hetero-atom, with a carbon tetrahalide of the formula IIICX.sub.4 (III)to give an iminium salt of the formula IV ##STR3## and subsequently hydrolyzing this iminium salt; and novel iminium salts of the formula IV.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolf Kropp, Martin Fischer, Klaus Halbritter
  • 6-Fluoropyridyl-(di)(thio)phosphoric acid esters
    Patent number: 4320122
    Abstract: 6-Fluoropyridyl-(di)(thio)phosphoric acid esters, and their use for combating pests, especially from the classes of insects and Nemathelminthes.The 6-fluoropyridyl-(di)(thio)phosphoric acid esters have the formula ##STR1## where X is oxygen or sulfur, R.sup.1 is linear or branched alkyl of a maximum of 3 carbon atoms and R.sup.2 is linear or branched alkylthio of a maximum of 6 carbon atoms.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Theobald, Heinrich Adolphi, Karl Eicken, Heinz-Guenter Oeser
  • Manufacture of aqueous polyvinylpyrrolidone-iodine solutions
    Patent number: 4320114
    Abstract: Aqueous solutions of polyvinylpyrrolidone-iodine, generally referred to as PVP-iodine, which is finding increasing use because of its germicidal, bactericidal, fungicidal and disinfectant properties.
    Type: Grant
    Filed: August 27, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Denzinger, Karl Herrle, Hans-Uwe Schenck
  • Triazolyl derivatives, their manufacture, and agents containing them for influencing plant growth
    Patent number: 4319911
    Abstract: Triazolyl derivatives of the formula ##STR1## where R.sup.1 and R.sup.2 are identical or different and each denotes alkyl of from 1 to 6 carbon atoms, naphthyl, unsubstituted phenyl or phenyl substituted by fluoro, chloro, bromo, alkyl or alkoxy of from 1 to 4 carbon atoms, R.sup.3 denotes alkyl of from 1 to 4 carbon atoms, unsubstituted benzyl, benzyl substituted by fluoro, chloro, bromo or alkyl of from 1 to 4 carbon atoms, R.sup.3 further denotes unsubstituted phenyl, or phenyl substituted by fluoro, chloro, bromo or alkyl of from 1 to 4 carbon atoms, and X denotes C.dbd.O or H--C--OR.sup.4, R.sup.4 denoting hydrogen, alkyl of from 1 to 4 carbon atoms, alkenyl of from 1 to 4 carbon atoms, unsubstituted or chloro- or bromo-substituted benzyl, CO--R.sup.5 or CO--NHR.sup.5, R.sup.
    Type: Grant
    Filed: April 24, 1980
    Date of Patent: March 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Ammermann, Costin Rentzea, Johann Jung
  • Device for positioning magnetic heads in memory processing units
    Patent number: 4319354
    Abstract: A device for positioning magnetic heads over preselected tracks on magnetic disks in memory processing units, the device consisting essentially of a linear electric motor, including a stationary, partially hollow magnetic device, and of a support member and a guide member which is mounted on the latter in an axially movable manner and is provided with at least one head mount for at least one head support, wherein the support member is mounted at one end of the magnetic device and is otherwise unsupported by the chassis of the memory processing unit.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: March 9, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Manzke, Peter Hammerschmitt, Richard Schneider, Karl Uhl
  • Process for recycling noble metal catalysts used for the manufacture of aromatic urethanes
    Patent number: 4319035
    Abstract: A process for the preparation of an aromatic urethane by the reaction in solution of an aromatic nitro compound or aromatic amine in the presence of an oxidation agent, with a hydroxyl compound and carbon monoxide in the presence of a noble metal catalyst, the improvement which comprises (a) treating the reaction solution, containing the noble metal catalyst, after the urethane formation is complete, with hydrogen (b) separating the noble metal in elementary form from the reaction solution, and (c) reusing the noble metal, together with a hydrohalic acid, as a catalyst.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: March 9, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Friedrich Towae
  • Process for removing formaldehyde from aqueous solutions of but-2-yne-1,4-diol
    Patent number: 4319055
    Abstract: A process for removing formaldehyde from aqueous solutions of but-2-yne-1,4-diol by treating the solutions with an alkaline agent at an elevated temperature in the presence of hydrogen peroxide.
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: March 9, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Rebafka, Gerd Heilen, Werner Fliege
  • Polyurethane sealant compositions
    Patent number: 4318838
    Abstract: The subject matter of this invention pertains to polyurethane sealant compositions which are flexible, strong, and resistant to shrinkage. The sealants are prepared by reacting a mixture of polyether polyol and inorganic filler with a polyisocyanate. The polyurethane sealants are useful for making castings, for patching, and as heat barriers.
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: March 9, 1982
    Assignee: BASF Wyandotte Corporation
    Inventors: James A. Gallagher, Bernardas Brizgys
  • 6H-1,2,4,6-Thiatriazine-1,1-dioxides
    Patent number: 4316015
    Abstract: 6H-1,2,4,6-Thiatriazine-1,1-dioxides of the formula I ##STR1## where R.sup.1 is an aliphatic radical, a cycloaliphatic radical, a substituted aliphatic radical, a cycloalkoxy-substituted aliphatic radical, unsubstituted or substituted phenyl, or unsubstituted or substituted benzyl, R.sup.2 is hydrogen, an aliphatic radical, a cycloaliphatic radical or substituted alkyl, X is oxygen, sulfur, sulfinyl or sulfonyl and Hal is halogen, herbicides containing these compounds, processes for their preparation, and methods for using the products as herbicides.
    Type: Grant
    Filed: October 23, 1980
    Date of Patent: February 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Hamprecht, Rolf-Dieter Acker, Bruno Wuerzer
  • Preparation of cathodic electrocoating binders
    Patent number: 4315840
    Abstract: A process for the preparation of self-crosslinking, cathodic electrocoating binders by reacting polyether-polyols, which may or may not contain thio groups, with semi-blocked diisocyanates or partially blocked polyisocyanates, wherein the reaction products (A), containing blocked isocyanate groups, are reacted with a polyamine (B), some of whose amino groups may or may not be in the form of ketimine groups, in such a way that one or more amino groups of the polyamine (B) form a urea group with a blocked isocyanate group of the reaction product (A), and the self-cross-linking reaction product of (A) and (B) is converted into a water-dilutable form in the conventional manner by protonization with an acid.The coating binders prepared according to the invention may be used for cathodic electrocoating of metal articles.
    Type: Grant
    Filed: October 18, 1979
    Date of Patent: February 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Eberhard Schupp, Erich Gulbins
  • 7,7'-Diamino derivatives of 2,2'-spirodibenzopyranes
    Patent number: 4316027
    Abstract: Dye intermediates of the formula ##STR1## where R.sup.1 is hydrogen, alkyl of 1 to 12 carbon atoms, phenyl which is unsubstituted or substituted by alkyl of 1 to 4 carbon atoms, methoxy, ethoxy, chlorine or bromine, or phenylalkyl of 7 to 10 carbon atoms, R.sup.2 is hydrogen or R.sup.1 and R.sup.2 together are dimethylene, trimethylene or tetramethylene, which are unsubstituted or substituted by alkyl of 1 to 12 carbon atoms, R.sup.3 and R.sup.5 are hydrogen, alkyl of 1 to 12 carbon atoms, cyano-, chlorine-, methoxy- or ethoxy-substituted alkyl of 2 to 4 carbon atoms, cycloalkyl of 5 to 7 carbon atoms, phenylalkyl of 7 to 10 carbon atoms or trimethylene which is unsubstituted or substituted by 1 to 3 methyl and is bonded to the carbon atom in the 6-position or 6'-position of the benzene ring, R.sup.4 and R.sup.
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: February 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Baumann, Andreas Oberlinner
  • Monoazo disperse dyes containing a nitrophenyl group and a homophthalimide group
    Patent number: 4315855
    Abstract: Dyes of the formula ##STR1## where X and Y, for example, can be hydrogen or halogen and R can be alkyl among other substituents. The dyes are derived from an O-nitroaniline diazo component and an N-substituted homophthalimide as coupling component. The dyes are greenish yellow to orange and give clear dyeings of good color strength and having good general fastness properties on polyesters, cellulose esters and in some cases also on polyamides. The fastness to light and the fastness to heat setting are excellent and may easily be influenced by the choice of substituents.
    Type: Grant
    Filed: July 22, 1976
    Date of Patent: February 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventor: Ernst Schefczik
  • Isoindoline colorants
    Patent number: 4316023
    Abstract: Isoindoline colorants of the general formula ##STR1## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl,R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl andX is oxygen, sulfur, imino or N-cyanoimino, and the ring C may or may not be substituted by groups which do not confer solubility.In surface coatings, printing inks and plastics, the colorants give very deep and brilliant yellow colorations which have good to very good lightfastness and fastness to overcoating.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: February 16, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Georg Henning, Wolfgang Lotsch