Patents Assigned to BASF
  • Heat-hardenable binder mixture
    Patent number: 4661410
    Abstract: The heat-hardenable binder mixture based on organic resins comprises an organic resin having primary and/or secondary and, if appropriate, also additional tertiary amino groups and a cross-linking agent based on an organic compound containing at least 2 carbalkoxymethyl groups. The binder mixture can additionally contain pigments, fillers, cross-linking catalysts, corrosion inhibitors and further finish auxiliaries. The binder mixture is used in a process for preparing coatings by applying a coating agent in the form of a film to a substrate and subsequently hardening the film by baking.
    Type: Grant
    Filed: August 12, 1985
    Date of Patent: April 28, 1987
    Assignee: BASF Farben & Fasern AG
    Inventor: Michael Geist
  • Preparation of carbamic acid esters
    Patent number: 4661217
    Abstract: Carbamic acid esters (I)R.sup.1 NHCOOR.sup.2 (I)wherein R.sup.1 is H, alkyl, cycloalkyl or alkylaryl and R.sup.2 is alkyl, are prepared by electro-oxidation of a formamide (II)R.sup.1 NHCHO (II)in the presence of an alcohol R.sup.2 OH and of an ionic halide.
    Type: Grant
    Filed: August 11, 1986
    Date of Patent: April 28, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Dieter Degner, Heinz Hannebaum, Michael Steiniger
  • Preparation of veratryl cyanide
    Patent number: 4661610
    Abstract: Veratryl cyanide is prepared by chloromethylating veratrol in solution in toluene and then reacting the resulting veratryl chloride with from 1 to 5 moles of an alkali metal cyanide, by a process in which the toluene from the chloromethylation is not removed for the reaction with cyanide, and from 3 to 25% by weight, based on veratryl chloride, of water, from 5 to 50% by weight, based on toluene, of a ketone of 3 to 6 carbon atoms and from 0.1 to 10% by weight, based on veratryl chloride, of a phase transfer catalyst are added before the reaction with cyanide.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: April 28, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Josef Muller, Walter-Wielant Wiersdorff, Wolfram Burst, Heinz Dralle, Ernst Schaffner, Rolf Steinkamp
  • Method for the preparation of 1,3-disubstituted 4,5-cis-dicarboxy-2-imidazolidones
    Patent number: 4659837
    Abstract: A process for the preparation of 1,3-disubstituted 4,5-cis-dicarboxy-2-imidazolidones useful as intermediates in the preparation of Vitamin H (biotin), said intermediates have the general formula ##STR1## in which R is an aliphatic hydrocarbon radical having 1 to 8 carbon atoms, an aralkyl radical or an aromatic hydrocarbon radical, preferably an allyl radical or a benzyl radical, comprising reacting a defined diaminosuccinic acid with phosgene in the presence of an alkali metal hydroxide.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: April 21, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Trautmann, Friedrich Vogel
  • Apparatus for making an electro-immersion finish by forced circulation of a liquid bath in a tank
    Patent number: 4659450
    Abstract: An improved and substantially contamination free electro-immersion finish is provided on an electrically conductive substrate such as a motor vehicle body. An immersion tank holds an aqueous liquid containing an electrophoretically precipitable resin. The substrate to be coated is immersed in the liquid and transported through the tank. The bath liquid in the lower region of the tank is circulated parallel to the direction of transport of the substrate. The bath liquid in the upper region is circulated opposite to the direction of transport of the substrate. The bath liquid may be recirculated by removing the liquid from the tank at the end of the tank where the substrate is removed from the tank. The bath liquid may be purified by filter units prior to being returned to the tank. A separator, such as a cyclone separator, may be disposed in the liquid recirculation conduit ahead of the filtration units.
    Type: Grant
    Filed: November 20, 1985
    Date of Patent: April 21, 1987
    Assignee: BASF Farben & Fasern AG
    Inventor: Arno Lauke
  • Cyclohexenone derivatives and their use for controlling undesirable plant growth
    Patent number: 4659367
    Abstract: Cyclohexenone derivatives of the formula ##STR1## where R.sup.1 is hydrogen or alkoxycarbonyl, R.sup.2 is alkyl, R.sup.3 is alkyl, alkenyl, alkynyl or haloalkenyl, R.sup.4 is a non-aromatic 5-membered ring which may or may not contain a double bond and contains a sulfur atom or a sulfinyl or sulfonyl group as a ring member, and n in 0, 1 or 2, are used for controlling undesirable plant growth.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: April 21, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Keil, Dieter Jahn, Rainer Becker, Norbert Goetz, Bruno Wuerzer, Norbert Meyer
  • Continuous preparation of furmamide
    Patent number: 4659866
    Abstract: Formamide is prepared continuously from methyl formate and ammonia, pure methanol being recovered, by a process wherein(a) the reaction of methyl formate and ammonia is carried out predominantly in the liquid phase in the upper region of a reaction column R having a total of from 15 to 30 theoretical plates,(b) the methanol formed in this reaction is removed, together with small amounts of formamide, from the column or the evaporator in vaporus form at the level of plates 1-5 (counted from the bottom),(c) the formamide is removed from this methanol/formamide mixture, together with small amounts of methanol, in a distillation column D1 and recycled to R, and(d) the small amounts of methanol contained in the bottom product from R, which substantially consists of formamide and in this column should be at from 110.degree. to 130.degree. C., are separated off in a distillation column D2.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: April 21, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Kaspar Bott, Gerd Kaibel, Herwig Hoffmann, Rudolf Irnich, Otto Kratzer
  • Disk drive unit comprising a head positioning device and electromagnetic releasing/arresting means therefor
    Patent number: 4660120
    Abstract: A disk drive unit is provided with an electromagnetic releasing/arresting device for the head support, in order to prevent the head and the disk record from being damaged when the drive unit is shipped, handled or switched off. The novel electromagnet has a low power consumption and small dimensions, is economical to manufacture and exhibits high operational reliability.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: April 21, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Manzke, Hans-Joachim Weis, Gerhard Soehring
  • Vinylbenzyl phosphates, and their use for treating dermalogical disorders
    Patent number: 4659701
    Abstract: A vinylbenzyl phosphate of the formula I ##STR1## where A, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8 and R.sup.9 have the meanings stated in the description, and their preparation are described. The substances are useful for the treatment of disorders.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: April 21, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Heiner Wuest, Fritz-Frieder Frickel, Axel Nuerrenbach
  • Fungicidal alpha-azolylglycols
    Patent number: 4659705
    Abstract: Fungicides contain an alpha-azolylglycol of the formula I ##STR1## where R.sup.1 is alkyl, R.sup.2 is alkyl or unsubstituted or substituted phenyl or biphenyl, R.sup.3 is hydrogen, alkyl, alkenyl, alkynyl or unsubstituted or substituted benzyl and X is CH or N, or its plant-tolerated salts or metal complexes.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: April 21, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Zeeh, Eberhard Ammermann, Ernst Buschmann, Ernst-Heinrich Pommer
  • Regeneration of inactive and poisoned platinum catalysts
    Patent number: 4659683
    Abstract: Noble metal catalyst, in particular platinum catalysts, which are applied on carriers and have become poisoned by metals as a result of being used for many years in the preparation of hydroxyl-ammonium salts by catalytic reduction of nitric oxide with hydrogen in an aqueous mineral acid are regenerated by a process in which the metallic impurities are dissolved using nitric acid or aqua regia, the solution is neutralized, the troublesome metals are precipitated from the neutralized solution by means of a selective precipitating reagent, and the purified platinum solution is reused for the preparation of the catalyst. Organic complexing agents which form insoluble or sparingly soluble complexes with the metallic impurities are preferably used as precipitating reagents.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: April 21, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Biffar, Otto Hofstadt, Klaus Kartte, Erwin Thomas, Franz-Josef Weiss
  • Phthalic anhydride process and product
    Patent number: 4659842
    Abstract: A phthalic anhydride product having a particle configuration made up of a mixture of spheroids, needle-like crystals, and amorphous particles is produced by feeding molten phthalic anhydride at a temperature between 131.degree. and 155.degree. into a spray nozzle in a closed cycle congealing chamber. The molten phthalic anhydride is discharged from the spray nozzle into a co-current or counter-current flow of inert gas at a temperature between -10.degree. and 70.degree. C., in order to congeal the product, which is then removed and transferred to a hopper or other storage means. For nozzle orifices having a diameter from 1 to 4 mm, discharge pressures of between 10 and 300 pounds per square inch are employed.
    Type: Grant
    Filed: June 19, 1985
    Date of Patent: April 21, 1987
    Assignee: BASF Corporation
    Inventors: Hans H. Vahlenkamp, Frank A. Calabrese
  • Preparation of insoluble polymer powders which are only slightly swellable
    Patent number: 4658002
    Abstract: Insoluble polymer powders which are only slightly swellable are prepared by polymerization of N-vinylpyrrolidone or a mixture of (a) an N-vinylcarboxamide, acrylamide, methacrylamide, acrylic acid, methacrylic acid, acrylates, methacrylates and/or a vinyl ester and (b) from 0.1 to 10% by weight, based on the total amount of monomers, of, as a crosslinking agent, a compound possessing two or more ethylenically unsaturated double bonds, in a powder bed in the presence of a heat-transfer medium and in the absence of oxygen and polymerization initiators, at from 90.degree. to 220.degree. C., the powder state being maintained, the reaction mass being circulated and the heat-transfer medium evaporated from the polymerization zone.The resulting polymers are used as adsorbents, as formulation assistants for crop protection agents or as ion exchangers.
    Type: Grant
    Filed: September 18, 1985
    Date of Patent: April 14, 1987
    Assignee: Basf Aktiengesellschaft
    Inventors: Chung-Ji Tschang, Karlheinz Messmer, Walter Denzinger
  • Preparation of olefinically unsaturated compounds in particular alkenols
    Patent number: 4658071
    Abstract: An olefinically unsaturated compound, in particular a very pure cis-isomer of an alkenylhydroxy compound of the formulaCH.sub.3 (CH.sub.2).sub.m --CH.dbd.CH--(CH.sub.2).sub.n --OR (I),where R is hydrogen or a protective group which can virtually be eliminated, m is from 1 to 12 and n is from 1 to 10, is obtained by catalytic partial hydrogenation of the corresponding acetylene derivative over a supported catalyst which contains from 0.05 to 5% by weight of palladium and from 0.05 to 15% by weight of zinc and/or cadmium.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: April 14, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Seufert, Norbert Goetz, Rainer Becker, Volker Schwendemann
  • Aqueous coal dispersions
    Patent number: 4657560
    Abstract: Aqueous, pumpable, free-flowing coal dispersions which may contain methanol and contain a special, oxyethylated, straight-chain, saturated fatty alcohol mixture as a nonionic dispersant, and the use of this dispersant in coal/water dispersions.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: April 14, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Knut Oppenlaender, Karl Stork, Friedrich Hovemann, Erich Schwartz
  • Spindle top
    Patent number: 4656823
    Abstract: An improved spindle top having between 3 and 8 fingers together in association with yarn-catching, yarn-directing grooves provides advantages in the manufacture of spun yarns. The improved top reduces ends down by reducing tension upstream of the spindle top, and the improved top is also believed to reduce the amplitude of tension surges which occur as the yarn rolls from one catch point on the spindle top to another.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: April 14, 1987
    Assignee: BASF Corporation
    Inventor: Glenn H. Mauney
  • Preparation of 2-alkyl-4,5-dihydroxymethylimidazoles
    Patent number: 4658035
    Abstract: 2-Alkyl-4,5-dihydroxymethyl-imidazoles of the formula ##STR1## where R is alkyl, are prepared by a process in which an imidazole of the formula ##STR2## is reacted with not less than 2 moles of formaldehyde in the presence of a base.
    Type: Grant
    Filed: July 12, 1985
    Date of Patent: April 14, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Uwe Kempe, Toni Dockner
  • Conductive nylon molding materials
    Patent number: 4655964
    Abstract: Conductive molding materials contain(A) from 29 to 76% by weight of one or more linear thermoplastic nylons,(B) from 20 to 50% by weight of finely divided calcined kaolin and/or finely divided calcium metasilicate, which are coated with organosilanes as coupling agents,(C) from 4 to 6% by weight of conductive carbon black having a BET specific surface area >900 m.sup.2 /g and a DBP absorption >300 ml/100 g and, if required,(D) from 0 to 15% by weight of conventional additives in effective amounts,the percentages of A to D summing to 100.
    Type: Grant
    Filed: July 11, 1985
    Date of Patent: April 7, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Steinberger, Johannes Schlag, Karl Schlichting, Erhard Seiler, Sibylle Von Tomkewitsch, Hans-Friedrich Schmidt
  • Magnetic recording media
    Patent number: 4656093
    Abstract: Magnetic recording media consisting of a non-magnetic base and, applied thereto, one or more firmly adhering magnetizable layers based on magnetic material finely dispersed in a polymeric binder, at least one lubricant and other conventional additives, wherein the lubricant used is a mixture of zinc stearate which has been rendered hydrophilic and stearylamide.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: April 7, 1987
    Assignee: Basf Aktiengesellschaft
    Inventors: August Lehner, Albert Kohl, Hermann Roller, Werner Balz, Eerhard Koester, Friedrich Sommermann
  • Improvements in plate springs for tape cassettes in particular video tape cassettes
    Patent number: 4656549
    Abstract: A tape cassette is provided with a pressure plate spring which has a tape-length indication comprising indicator elements which have been cut in or cut out mechanically. Advantageously, both long arms possess such indicators, which may even be of different types. In a particularly advantageous spring shape, one long spring arm has an edge possessing incisions and the other long spring arm has an edge possessing projections, as a result of which the springs can be arranged for punching in such a way that waste is avoided.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: April 7, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Heinz Berger, Herbert Dietze, Joachim Seitz