Patents Assigned to BASF
  • Aqueous liquids containing metal cavitation-erosion corrosion inhibitors
    Patent number: 4440721
    Abstract: Compositions for inhibiting mineral scale and the corrosion of metals particularly the cavitation corrosion of aluminum in the presence of aqueous liquids are disclosed. The combination of a water-soluble phosphate with at least one of a water-soluble molybdate, tungstate, or selenate is disclosed as providing a synergistic protective effect against the cavitation corrosion of aluminum in aqueous liquids.
    Type: Grant
    Filed: February 11, 1983
    Date of Patent: April 3, 1984
    Assignee: BASF Wyandotte Corporation
    Inventors: Joe C. Wilson, Stanley T. Hirozawa, John J. Conville
  • Container for at least one carrier member bearing a reeled tape-like recording medium, especially a magnetic tape cassette, and an assembly of two or more such containers
    Patent number: 4440299
    Abstract: A container for at least one carrier member bearing a tape-like recording medium comprises a hollow body and a ramp declining toward an insertion/withdrawal opening, the carrier member with the recording medium being held in the hollow body by holding means and being transferred, after its release, via the ramp to the withdrawal position in which it protrudes at least partially from the opening. The holding means is advantageously a spring-loaded element mounted movably relative to the hollow body and preferably located on a slide.A plurality of containers can easily be connected to one another by tongue-shaped members which can be inserted into recesses in two abutting side walls, and can easily be detached from one another again.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Ludwig Peinecke
  • Process for the preparation of cellular and non-cellular polyurethane elastomers
    Patent number: 4440705
    Abstract: A process for the preparation of optionally cellular and non-cellular polyurethane elastomers, preferably by reaction injection molding, organic polyisocyanates, polyether polyols based on polyoxyalkylene polyether polyols with terminal hydroxyethylene groups and an ethoxylation degree of 1 to 13, having a content of primary hydroxyl groups at the corresponding degree of ethoxylation as the value of curve A to 100 percent with curve A describing the dependency of the primary hydroxyl group content upon the degree of ethoxylation are reacted with chain extenders and/or cross-linking agents in the presence of catalysts as well as optionally blowing agents, auxiliaries and additives.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Dietmar Nissen, Wolfgang Straehle, Matthias Marx
  • Preparation of electrically conductive products
    Patent number: 4440693
    Abstract: A process for the preparation of electrically conductive products which are stable to air and have conductivities greater than 1 .times.10.sup.-3 S/cm, by reacting a cation of a metal of group VII or VIII or of sub-group I of the periodic table with an organic chelating compound to give a metal chelate and oxidizing the latter to form a oxidized product, wherein the organic chelating compound is a 1,9-substituted phenalene of the formula I ##STR1## where X is O, NH, S, Se or Te and Y is OH, NH.sub.2 or SH. The electrically conductive products are useful for the production of solar cells, the conversion and fixing of radiation, the production of electrical and magnetic switches and the antistatic treatment of plastics.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Naarmann, Klaus Penzien, Volker Muench, Klaus-Dieter Franz
  • Carriage for a scanning head in recording and/or playback apparatus for disk records
    Patent number: 4441130
    Abstract: A carriage for a scanning head in recording and/or playback apparatus for disk records, a first rod-shaped guide member being provided for the support and longitudinal guidance of the carriage, and a second rod-shaped guide member being provided for the transverse support of the carriage, wherein the carriage possesses at least one prism-shaped aperture for said first rod-shaped guide member, and at least one leaf spring presses the carriage against the rod-shaped guide members.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Udo Boehm, Klaus Schulze-Berge, Roland Brotzler
  • Thermoplastic molding material
    Patent number: 4440906
    Abstract: The use of tricyclodecenyl alcohol in place of other crosslinking agents for crosslinking the soft component of impact-resistant polystyrene based on a polystyrene-grafted poly(alkyl acrylate) improves the flow of mixtures of the said polystyrene with polyphenylene ethers.
    Type: Grant
    Filed: January 6, 1982
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Brandstetter, Juergen Hambrecht, Adolf Echte
  • Continuous preparation of 3-alkyl-buten-1-als
    Patent number: 4440960
    Abstract: A process for the continuous preparation of 3-alkyl-buten-1-als by oxidative dehydrogenation of 3-alkyl-buten-1-ols at from 320.degree. to 650.degree. C. with oxygen over a catalyst containing copper and/or silver, wherein, within one second after contact with the catalyst, the vaporous reaction mixture, which is at from 320.degree. to 650.degree. C., is brought into contact with a liquid comprising water and/or the condensed reaction mixture at from -20.degree. to 50.degree. C., and the 3-alkyl-buten-1-als are separated off from the resulting condensate.
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: April 3, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Sauer, Werner Aquila, Wolfgang Hoffmann, Karl Brenner, Klaus Halbritter
  • Preparation of aqueous thermosetting electrical insulating varnishes
    Patent number: 4439579
    Abstract: Aqueous thermosetting electrical insulating varnishes are prepared by a process wherein hydroxyl-containing polyester-imides which have kinematic viscosities of from 16 to 30 mm.sup.2 .multidot. s.sup.-1 and acid numbers of <10, and which have been obtained by condensing aromatic tricarboxylic acid monoanhydrides, aromatic dicarboxylic acids or their esterifiable or transesterifiable derivatives, diamines, diols, and triols containing an isocyanurate ring, are treated, at from 80.degree. to 130.degree. C., in the presence or absence of up to 5% by weight, based on polyester-imide, of an organic solvent, with from 5 to 15% by weight, based on polyester-imide, of ammonia in the form of an aqueous solution, thereby producing aminolysis and hydrolysis so that a neutral or slightly acidic solution results, which is diluted to a viscosity of from 100 to 10,000 mPa.s by adding demineralized water, from 0.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: March 27, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Udo Reiter, Hans-Uwe Schenck, Helmut Lehmann, Ferdinand Hansch
  • Halogenated, tertiary diisocyanates and their preparation
    Patent number: 4439369
    Abstract: Halogenated, tertiary diisocyanates and a process for their preparation by reacting tertiary diisocyanates with halogen, sulfuryl chloride and/or sulfuryl bromide.The halogenated, tertiary diisocyanates which can be prepared by the process according to the invention are valuable starting materials for the preparation of pest control agents, fatliquors, drugs, flameproofing agents, lubricating oils, synthetic resins and lubricants.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: March 27, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl-Heinz Koenig, Volker Schwendemann
  • Preparation of acicular ferromagnetic metal particles consisting essentially of iron
    Patent number: 4439231
    Abstract: Acicular ferromagnetic metal particles consisting essentially of iron are prepared by a process wherein acicular iron(III) oxide hydroxide provided with a shape-stabilizing surface coating, or iron(III) oxide obtained therefrom by dehydration, is reduced by means of a decomposable organic compound and hydrogen.
    Type: Grant
    Filed: July 28, 1983
    Date of Patent: March 27, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Steck, Peter Rudolf, Wilhelm Sarnecki, Werner Loeser, Jenoe Kovacs, Helmut Jakusch
  • Tape cassette, especially a magnetic tape cassette
    Patent number: 4438892
    Abstract: In a magnetic tape cassette, especially a compact cassette, at least one hole in the conventional liners is provided, according to the invention, with at least one raised edge portion which is located between the aperture in the housing wall for admitting the drive spindle and the inner wall of the hub, and serves as a resilient support for the hub.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: March 27, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Horst Fitterer, Hubert Koob, Bert Nestler
  • Process for preparing aqueous varnishes
    Patent number: 4439575
    Abstract: Aqueous varnishes containing mineral fillers and/or pigments are prepared by allowing a hot wax emulsion in water at between 80.degree. C. and 100.degree. C. to flow with vigorous stirring into the aqueous varnish containing mineral fillers and/or pigments and to cover at least some of the filler and/or pigment particles with a wax coating. These varnishes show virtually no sedimentation of the solid constituents.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: March 27, 1984
    Assignee: BASF Farben + Fasern AG
    Inventor: Gunther Schwarz
  • Trimerization catalysts and organo-mercury compounds as co-catalysts for the preparation of noncellular polyurethane elastomers
    Patent number: 4438248
    Abstract: The subject matter of this invention relates to the preparation of polyurethanes. It is particularly concerned with the use of organo-mercury compounds and trimerization catalysts as co-catalysts in the preparation of noncellular polyurethane elastomers.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Wyandotte Corporation
    Inventors: Donald L. Christman, Bernard A. Merkl
  • .OMEGA.-Cyano-1, .OMEGA.-diphenyl-azaalkane derivatives, their preparation and drugs containing them
    Patent number: 4438131
    Abstract: .omega.-Cyano-1,.omega.-diphenyl-azaalkane derivatives of the formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, m and n have the meanings given in the description, and salts thereof with physiologically tolerated acids, are useful in treating cardiovascular disorders.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Oskar Ehrmann, Manfred Raschack, Josef Gries, Rolf Kretzschmar, Hans D. Lehmann, Ludwig Friedrich, Dirk Wuppermann, Frank Zimmermann, Werner Seitz, Hans J. Treiber, Ferdinand Dengel, Wolfram Frank, Hans-Georg Kurbjuweit, Claus D. Mueller
  • Thermoplastic molding masses of styrene-acrylonitrile and polyamide
    Patent number: 4438237
    Abstract: Thermoplastic molding masses comprise a styrene and/or .alpha.-methylstyrene-acrylonitrile copolymer and a polyamide based on piperazine.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Brandstetter, Juergen Hambrecht, Rudolf H. Jung, Gerhard Lindenschmidt
  • Manufacture of hydroxylammonium salts
    Patent number: 4438084
    Abstract: Hydroxylammonium salts are manufactured by a process comprising the catalytic reduction of nitric oxide with hydrogen in a dilute aqueous mineral acid in the presence of a suspended platinum catalyst at an elevated temperature, wherein the reaction is carried out in vessels of which the walls consist essentially of conventional copper-free molybdenum-containing austenitic chromium-nickel steels which contain from 16 to 28% by weight of chromium, from 10 to 50% by weight of nickel, from 1 to 4% by weight of molybdenum and at most 0.05% by weight of carbon, together with at least 0.05% by weight of nitrogen up to 0.5% by weight.
    Type: Grant
    Filed: December 17, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Guenther Rapp, Erwin Thomas, Rolf Muenster
  • Lubricant, containing esterified ethylene/acrylic acid or ethylene/maleic acid copolymers as the active ingredient, for moulding chlorine-containing thermoplastics
    Patent number: 4438008
    Abstract: A lubricant for molding chlorine-containing thermoplastics, which contains ethylene/acrylic acid or ethylene/maleic acid copolymers esterified, in a molar ratio of carboxyl groups to alcoholic hydroxyl groups of from 1:0.2 to 1:1, with C.sub.1 -C.sub.20 -aliphatic alcohols which may or may not contain ether groups, the copolymers, prior to esterification, having a mean molecular weight of from 500 to 10,000 and containing from 2 to 15% by weight of acrylic acid or from 1 to 8% by weight of maleic acid as copolymerized units, the percentages being based on copolymer.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Oeder, Walter Ziegler, Manfred Daeuble, Wolfram Dietsche, Albert Hettche, Stefan Weiss
  • Preparation of sulfides
    Patent number: 4438282
    Abstract: Sulfides prepared by reacting a sulfoxide with a hydrazine or hydroxylamine derivative or a quaternary salt thereof are useful starting materials for the preparation of drugs, pesticides and dyes.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Hartmut Lardon, Guenther Seybold
  • Tertiary alkanolamines to increase viscosity of filled liquid polymers
    Patent number: 4438235
    Abstract: Filled liquid, polyhydroxyl-containing polymers such as polyether and polyester polyols can be increased in viscosity by incorporating therein a tertiary alkanol monoamine.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: March 20, 1984
    Assignee: BASF Wyandotte Corporation
    Inventor: Bernardas Brizgys
  • Document identification employing exchange-anisotropic magnetic material
    Patent number: 4438462
    Abstract: A process for authenticating recording media which are to be safeguarded against falsification and which possess a layer of exchange-anisotropic magnetic material, by determining the residual recording which is left over, because of the exchange anisotropy of the magnetic material, from a recording of a sequence of signals after exposure of the material to a specific temperature cycle and, subsequently, to a magnetic AC field which decreases to zero, and an apparatus for carrying out the said process.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: March 20, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Koester, Joachim Hack, Manfred Steuerwald