Patents Assigned to BASF
  • Ruthenium coated cathodes
    Patent number: 3974058
    Abstract: Composite cathodes comprising a metal substrate having thereon an intermediate coating of cobalt and an overcoating of ruthenium for use in electrolytic cells for the electrolysis of aqueous alkali metal halide solutions reduces the cell voltage requirements in comparison to the conventional ferrous metal cathodes traditionally used in such cells.
    Type: Grant
    Filed: September 16, 1974
    Date of Patent: August 10, 1976
    Assignee: BASF Wyandotte Corporation
    Inventor: Sudarshan D. Gokhale
  • Manufacture of high-density foamed polymer
    Patent number: 3973884
    Abstract: A method and apparatus are disclosed for the manufacture of foamed polystyrene particles of moderately great density, such as 3 to 25 lbs. per cubic foot (50 to 400 milligrams per cubic centimeter). Beads are fed by a constant-displacement auger to an expander vessel having the form of, in its lowest part, a cylinder with a vertical axis, and thereabove, of a frustrum of an inverted cone having a base angle of about 83.degree. to 70.degree.. Steam is supplied to the vessel in an appropriate, controlled manner. The vessel also contains stator bars, to break lumps and retard the rotation of the material in the vessel, and rotating bars, to provide the necessary agitation. Desirably, the equipment includes a discharge chute of adjustable location, to facilitate adjustment of the residence time and consequently of the density of the expanded beads being produced.
    Type: Grant
    Filed: October 23, 1974
    Date of Patent: August 10, 1976
    Assignee: BASF Wyandotte Corporation
    Inventor: Michael A. Terminiello
  • Dyes for thermoplastics
    Patent number: 3974123
    Abstract: Dyes of the formula ##SPC1##WhereD is the radical of the diazo component,R is hydrogen, alkyl or aryl,X is hydrogen, cyano or carbamoylA.sup.1 is A or ##SPC2##AndA is hydrogen or an optionally substituted hydrocarbon radical, are eminently suitable for coloring thermoplastic resinous material. Colorations stable to heat and with excellent fastness properties are obtained, the color strength of the dyes being remarkable.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: August 10, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Johannes Dehnert, Gunther Lamm
  • Manufacture of derivatives of malondialdehyde
    Patent number: 3974159
    Abstract: Compounds of the general formula ##EQU1## which may be used in place of malondialdehyde in synthesis reactions are obtained in a one-step reaction form dimethylformamide, phosgene and an alkyl vinyl ether.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: August 10, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Decker, Willibald Schoenleben, Herbert Toussaint, Hewig Hoffmann
  • Manufacture of hexamethylene diamine
    Patent number: 3972938
    Abstract: A process for the catalytic hydrogenation of adiponitrile in the presence of ammonia, in which a portion of the reaction mixture is recycled and specific molar ratios of adiponitrile and ammonia are maintained.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: August 3, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Voges, Leopold Hupfer, Siegfried Winderl, Karl Wilhelm Leonhard, Herwig Hoffmann
  • Fungicide
    Patent number: 3973018
    Abstract: A fungicidal composition comprising N-tridecyl-2,6-dimethylmorpholine in combination with a compound selected from the group consisting of manganese ethylenebisdithiocarbamate, manganese zinc ethylenediaminebisdithiocarbamate and an ammonia complex of zinc-(N,N alkylenebisdithiocarbamate) and N,N'-polyethylene bis-(thiocarbamoyl)-disulfide which has a strong synergistic fungicidal action, and a process for controlling the spread of fungi, i.e. inhibiting the growth of fungi, with this composition.
    Type: Grant
    Filed: April 3, 1974
    Date of Patent: August 3, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Ernst-Heinrich Pommer, Juergen Kradel, Karl-Heinz Koenig, Walter Sanne
  • Production of resins
    Patent number: 3972849
    Abstract: A process for the production of milled particulate resins which comprises carrying out the reaction of the resin components in a moving reaction vessel containing carrier bodies. The new process is particularly suitable for the production of pigmented resins, for example daylight fluorescent pigments.
    Type: Grant
    Filed: April 3, 1974
    Date of Patent: August 3, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Hilmar Bruenemann, Guenter Stoeckelmann, Volker Radtke
  • Spirodipyrans and chromogenic materials for copying processes
    Patent number: 3971808
    Abstract: Spirodipyrans based on condensed pyrylium salts and 4-dialkylamino-2-hydroxybenzaldehydes, their manufacture and their use as chromogenic materials in pressure-sensitive recording materials, particularly copying papers.
    Type: Grant
    Filed: May 7, 1974
    Date of Patent: July 27, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Baumann, Andreas Oberlinner
  • Production of aminobenzaldehydes
    Patent number: 3971821
    Abstract: Aminobenzaldehyde compounds and a process for their production by the reaction of an aniline with a formamide in the presence of an acid halide with or without a following reaction with a nitrogen compound. The products are starting materials for the production of optical brighteners, dyes, plant protection agents and medicaments.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: July 27, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Baumann, Klaus Grychtol, Andreas Oberlinner
  • Method of rejuvenating alkali-cell diaphragms
    Patent number: 3971706
    Abstract: By adding to the anolyte of an alkali-brine electrolysis cell of the kind that has a diaphragm of relatively hydrophobic material such as polytetrafluoroethylene, a small quantity of C.sub.8 to C.sub.14 alkyl glycoside, the wetting performance of said anolyte is much improved, and in some instances, good flow of anolyte through the diaphragm is readily re-established, without need for dismantling the cell to re-wet the diaphragm.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: July 27, 1976
    Assignee: BASF Wyandotte Corporation
    Inventors: Stanley T. Hirozawa, William K. Langdon
  • Stable, liquid solutions of isocyanurate-polyisocyanates containing amide and/or acylurea groups
    Patent number: 3970600
    Abstract: Stable, liquid, homogeneous solutions of isocyanurate-polyisocyanates containing amide and/or acylurea groups in monomeric diisocyanates and/or polyisocyanates which are free from amide, acylurea and/or isocyanurate groups, are obtained by reacting polybasic carboxylic acids with diisocyanates and/or polyisocyanates to give diisocyanates and/or polyisocyanates containing amide groups and/or acylurea groups, converting the diisocyanates and/or polyisocyanates containing amide and/or acylurea groups by trimerization and, optionally, polymerization, into isocyanurate-polyisocyanates containing amide and/or acylurea groups, and mixing the products with monomeric diisocyanates and/or polyisocyanates.
    Type: Grant
    Filed: January 16, 1975
    Date of Patent: July 20, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Georg Falkenstein, Richard Palm, Dietrich Wolff
  • Multiple filter press diaphragm former
    Patent number: 3970516
    Abstract: Apparatus for producing a plurality of filter press diaphragms at any one time is disclosed herein. In one form of the invention the apparatus includes a sealed housing containing a plurality of sealed modules fed from a common header, to produce the diaphragms batch-wise. In another form of the invention, an indexing table is employed to produce the diaphragms continuously.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: July 20, 1976
    Assignee: BASF Wyandotte Corporation
    Inventors: Barry M. Barkel, Stephen M. Collins, William M. Herring
  • Polyhexamethylene adipamide molding compositions not subject to discoloration when conditioned with water
    Patent number: 3970634
    Abstract: Molding compositions based on polyhexamethylene adipamide and containing phenolic additives and, to obviate discoloration on conditioning, from 0.001 to 0.5% by weight, based on polyhexamethylene adipamide, of a compound having a chain transfer constant for styrene at 100.degree.C of more than 1.5. The preferred chain transfer agent used is n-dodecylmercaptan.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: July 20, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Horn, Claus Cordes, Richard Pflueger
  • End connector for filter press cell
    Patent number: 3970539
    Abstract: An end connector for a filter press cell disassociates the mechanical sealing function from the primary electrical connection. The connector includes a boss extension having an aperture formed therein for tightening the connector between the boss and boss extension. The present invention is adaptable for use as an end connector for either the anode or the cathode.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: July 20, 1976
    Assignee: BASF Wyandotte Corporation
    Inventors: Stephen M. Collins, Albert J. Schweickart
  • Acidic surfactant composition, stock surfactant solution prepared therefrom, and method of washing soiled substrates employing the same
    Patent number: 3969282
    Abstract: An acidic, stable, homogeneous, mobile liquid, biodegradable surfactant composition is provided which consists essentially of1. at least one liquid hydrophilic nonionic surfactant,2. at least one substantially salt free liquid biodegradable alkyl benzene sulfonic acid surfactant corresponding to the structural formula: ##SPC1##Wherein n is an integer having a numerical value of from 3 to 14,3. about 0.0001-1% by weight of hydrogen peroxide, and4. about 0-95% by weight of water. The surfactant composition contains a weight ratio of surfactant (1) to surfactant (2) from 1:5 to 5:1, and surfactant (1) has hydrophilic properties whereby the surfactant composition is stable and remains homogeneous in the absence of an added hydrotrope. The hydrogen peroxide is present in an amount to control obnoxious odors and the use of an expensive perfume to mask odors is not necessary.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: July 13, 1976
    Assignee: BASF Wyandotte Corporation
    Inventors: Frank R. Kappler, John D. Ciko, John J. Cramer
  • Manufacture of aliphatic isocyanates
    Patent number: 3969389
    Abstract: Aliphatic isocyanates are manufactured by thermal decomposition of aliphatic carbamic acid halides at a temperature not less than 25.degree.C above their boiling points in the presence of higher-boiling organic solvents and subsequent isolation of the resulting aliphatic isocyanate from the decomposition mixture. The isocyanates which may be manufactured by the process of the invention are valuable starting materials for the manufacture of plant protection agents, pesticides, dyes, synthetic resins and plastics, hydrophobic agents for textiles, detergents, bleaches and adhesives.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: July 13, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Urbach, Albrecht Mueller
  • Production of hydrogen chloride by thermal dissociation of organic substances containing chlorine
    Patent number: 3969490
    Abstract: A process for the thermal dissociation of an organic substance containing chlorine in which substantially anhydrous hydrogen chloride is obtained. The substance containing chlorine is introduced in a first stage into a salt melt in the absence of oxygen, hydrogen chloride is discharged from the reaction mixture and then oxygen is supplied to the salt melt in a second stage.
    Type: Grant
    Filed: December 12, 1973
    Date of Patent: July 13, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerard DE Beuckelaer, Gerd Krome, Jan Langens, Ferdinand Lockefeer, Paul Schaerlaekens
  • Manufacture of alkylisocyanates
    Patent number: 3969388
    Abstract: Alkylisocyanates are manufactured by thermal decomposition of N-alkylcarbamic acid halides in the vapor state, at not less than 20.degree.C above their boiling points, in a plurality of reaction chambers, the bulk of the hydrogen halide formed in each reaction chamber being separated off. The products are starting materials for the manufacture of plant protection agents, pesticides, dyes, resins and plastics, textile waterproofing agents, detergents, bleaches and adhesives.
    Type: Grant
    Filed: April 18, 1975
    Date of Patent: July 13, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Urbach, Albrecht Mueller
  • Manufacture of propiolic acid
    Patent number: 3969200
    Abstract: Production of propiolic acid by anodic oxidation of propargyl alcohol in aqueous sulfuric acid solution, using lead dioxide/titanium composite electrodes as anodes and extracting the propiolic acid from the electrolyte with an ether which contains more than one ether oxygen atom and boils above propiolic acid.
    Type: Grant
    Filed: February 14, 1975
    Date of Patent: July 13, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinz Nohe, Peter Jaeger, BASF Aktiengesellschaft
  • Manufacture of copolymers of 4-methylpentene-1
    Patent number: 3969333
    Abstract: Copolymers of 4-methylpentene-1 are prepared by copolymerization of 4-methylpentene-1 with one or more other C.sub.2-18 .alpha.-alkenes at a temperature above room temperature and in the presence of hydrogen using a Ziegler/Natta catalyst system. The polymerization is carried out at a relatively very high temperature and in the presence of an inert gas with the proviso that the partial pressures of the inert gas and of the hydrogen and the sum of the partial pressures of the inert gas, hydrogen and 4-methylpentene-1 have specific values. In this way, copolymers having large crystalline fractions are obtained in a high yield per unit of catalyst system per unit time.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: July 13, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Johann Nickl, Hans Schick, Heinz Mueller-Tamm