Patents Assigned to Hoechst AG
  • Patent number: 5559277
    Abstract: The invention relates to a process for preparing biphenyls of the formula (I) ##STR1## where R.sup.1a to R.sup.10a are, independently of one another, hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkenyl, C.sub.1 -C.sub.12 -alkynyl, alkoxy-(C.sub.1 -C.sub.12), acyloxy-(C.sub.1 -C.sub.12), O-phenyl, aryl, heteroaryl, fluorine, chlorine, OH, NO.sub.2, CN, COOH, CHO, SO.sub.3 H, SO.sub.2 R, SOR, NH.sub.2, NH-alkyl-(C.sub.1 -C.sub.12), N-alkyl.sub.2 -(C.sub.1 -C.sub.12), C-Hal.sub.3, NHCO-alkyl-(C.sub.1 -C.sub.8), CONH-alkyl-(C.sub.1 -C.sub.4), CON-(alkyl).sub.2 -(C.sub.1 -C.sub.4), COO-alkyl-(C.sub.1 -C.sub.12), CONH.sub.2, CO-alkyl-(C.sub.1 -C.sub.12), NHCOH, NHCOO-alkyl-(C.sub.1 -C.sub.8), CO-phenyl, COO-phenyl, CHCHCO.sub.2 -alkyl-(C.sub.1 -C.sub.12), CHCHCO.sub.2 H, PO-phenyl.sub.2, PO-alkyl.sub.2 -(C.sub.1 -C.sub.8), by reaction of haloaromatics or aryl sulfonates of the formula (II) ##STR2## with arylboron derivatives of the formula III ##STR3## where R.sup.1a to R.sup.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: September 24, 1996
    Assignee: Hoechst AG
    Inventors: Matthias Beller, Wolfgang A. Herrmann, Christoph Brossmer
  • Patent number: 5556435
    Abstract: Mixtures of fiber-reactive dyes in brilliant orange to red shades comprise one or more disazo dyes of the formula ##STR1## and one or more monoazo dyes of the formula ##STR2## in which: D.sup.1 D.sup.2 and D.sup.3, which are identical to or different from one another, are phenyl or 2-naphthol substituted by vinylsulfone, vinylsulfone, M is hydrogen or an alkali metal, m, n and p are zero or 1, X is chlorine, fluorine, hydroxy, cyanoamino or lower alkylamino, with W being a 2-chloro- or 2-fluoro-s-triazin-6-yl radical which is substituted in position 4 by chlorine, hydroxy, phenoxy, morpholino or by a radical corresponding to one of the definitions of D.sup.1 or by a phenyl radical, which may be substituted by sulfo, carboxy, methyl, ethyl, methoxy, ethoxy and/or hydroxy, or D.sup.3 and W are as further described in the specification.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: September 17, 1996
    Assignee: Hoechst AG
    Inventors: Werner H. Russ, Kurt Hussong, Karl Krieger, Uwe Mrotzeck
  • Patent number: 5554722
    Abstract: Aromatic polyamide compositions with improved electrostatic properties, formed structures produced therefrom, and use and production thereof.Described are compositions comprising an aromatic polyamide which is soluble in organic solvents and from 0.01 to 30% by weight, based on the weight of the composition, of an organic or organometallic charge control agent.The compositions can be used for producing formed structures, in particular fibers; these fibers are preferably used for producing webs which can be used for producing dust filters.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: September 10, 1996
    Assignee: Hoechst AG
    Inventors: Dieter Eichenauer, Werner Groh, Hans-Tobias Macholdt, Jorg Dahringer, Holger Jung, Richard Neuert
  • Patent number: 5550286
    Abstract: Process for the of aromatic carboxamides from aromatic carboxylic acids and ureaProcess for the preparation of aromatic carboxamides of the formula (I) ##STR1## in which R.sub.1, R.sub.2, and R.sub.3 are identical or different and are hydrogen, fluorine, chlorine or bromine atoms, or are alkyl(C.sub.1 -C.sub.4), hydroxyl or nitro groups, or R.sub.1 and R.sub.2 form an aromatic ring of 5 or 6 ring members, which ring may be substituted by fluorine, chlorine or bromine atoms or by alkyl(C.sub.1 -C.sub.4), hydroxyl or nitro groups, which involves reacting aromatic carboxylic acids of the formula (II) ##STR2## in which R.sub.1, R.sub.2 and R.sub.3 are as defined above with urea in an inert organic solvent with the addition of a catalytic amount of phosphorous acid.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: August 27, 1996
    Assignee: Hoechst AG.
    Inventors: Yani Christidis, Michael Meier
  • Patent number: 5542972
    Abstract: Aqueous ink formulations consisting essentially of one or more reactive dyes whose reactive group contains a cyanamido group and an alkaline agent are notable for improved storage stability and are especially suitable for inkier printing.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: August 6, 1996
    Assignee: Hoechst AG
    Inventors: Andreas von der Eltz, Werner H. Russ
  • Patent number: 5543373
    Abstract: The present invention relates to a metallocene compound of the formula I ##STR1## which can advantageously be used as catalyst component for olefin polymerization.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: August 6, 1996
    Assignee: Hoechst AG
    Inventors: Andreas Winter, Frank K uber, Michael Aulbach, Bernd Bachmann, Robert Klein, Klaus K uhlein, Walter Spaleck, Christian Kohlpaintner
  • Patent number: 5539114
    Abstract: A process for the preparation of quinazoline-2,4-diones of the formula (I) ##STR1## in which R.sup.1 is aryl and R.sub.2, R.sup.3, R.sup.4, and R.sup.5 independently of one another are halogen, alkyl, alkoxy or hydrogen, by reacting anthranilic acid esters of the formula (II) ##STR2## in an aprotic reaction medium with aryl isocyanates R.sup.1 --N.dbd.C.dbd.O to give N-arylcarbamoyl-anthranilic acid esters of the formula (III) ##STR3## and cyclizing these in the presence of a base selected from the group of alkali metal or alkaline earth metal alkoxides, amides, hydrides or tetraalkylammonium hydroxides.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: July 23, 1996
    Assignee: Hoechst AG
    Inventors: Robert Cosmo, Wolfgang Tronich
  • Patent number: 5534634
    Abstract: Process for preparing trifluoroethyl sulfur compounds from thiolates and 1-chloro-2,2,2-trifluoroethane. The invention relates to the preparation of trifluoroethyl sulfur compounds of the formula RSCH.sub.2 CF.sub.3 by reacting 1-chloro-2,2,2-trifluoroethane CH.sub.2 Cl--CF.sub.3 in a polar aprotic solvent with salts of thiols of the formula RSH, where R can be an alkyl or aryl radical or a heterocyclic radical.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: July 9, 1996
    Assignee: Hoechst AG
    Inventors: Wolfgang Appel, Frank Ebmeyer, Tobias Metzenthin, Gunter Siegemund
  • Patent number: 5529585
    Abstract: Modified cellulose fiber is produced by adding a modifier to a cellulose solution and spinning fibers from the solution, or by adding a modifier to a viscose solution and spinning fibers by the viscose spinning process, said modifier being a polymeric amine compound having pendant primary, secondary or tertiary amino groups and having a molecular mass of more than 1000.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 25, 1996
    Assignee: Hoechst AG
    Inventors: Andreas Schrell, Bernd Huber
  • Patent number: 5523486
    Abstract: A process for preparing acetoacetarylamides of the formula I ##STR1## where R.sup.1 and R.sup.2 are identical or different alkyl radicals,l and m are each 0, 1 or 2, andis 0 or 1,by addition of diketene to the appropriate arylamine by continuously reacting the arylamine with diketene in the presence of a mixture of water and of a (C.sub.1 -C.sub.4)-alkanol at temperatures from 60.degree. C. to 100.degree. C. in the course of from 0.1 to 10 min.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: June 4, 1996
    Assignee: Hoechst AG
    Inventors: Karl E. Mack, Michael Bohusch
  • Patent number: 5523381
    Abstract: Described is a process for producing linear polyesters of improved whiteness and reduced yellowness by esterification of aromatic dicarboxylic acids or transesterification of their bis(lower alkyl) esters with or without aliphatic dicarboxylic acids with diols to form bisdiol esters and their oligomers and further condensation of these preproducts to spinnable polyesters, which comprises adding to the esterification, transesterification or polycondensation hatch from 0.5 to 15% by weight of phosphorus-containing modifiers and conducting the polycondensation initially in the melt to an IV from 0.4 to 0.55 dl/g and thereafter in solid phase to an IV from 0.62 to 0.72, the indicated IV values being measured at 25.degree. C. in dichloroacetic acid. The phosphorus-containing modifiers used preferably have the formula V or VI ##STR1## where R.sup.6 is alkylene or polymethylene of 2 to 6 carbon atoms or phenyl and R.sup.5 is alkyl of 1 to 6 carbon atoms, aryl or aralkyl, in the cocondensed state.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: June 4, 1996
    Assignee: Hoechst AG
    Inventors: Ralf Ueberdiek, Eckhard Husing
  • Patent number: 5520860
    Abstract: To prepare a compacted, granular sodium silicate having an SiO.sub.2 /Na.sub.2 O molar ratio of 1.7:1 to 4.1:1, sodium silicate having a median particle diameter of <500 .mu.m is first mixed with a material increasing its hardness before being converted into pressed granules having particle sizes of 0.1 to 5 mm by compacting, comminution and screening.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: May 28, 1996
    Assignee: Hoechst AG
    Inventors: Alexander Tapper, Gunther Schimmel, Hans-Peter Rieck, Gerhard Noltner
  • Patent number: 5516948
    Abstract: Mixtures of isomeric decyl alcohols obtained by oligomerization of propylene in the presence of deactivated zeolites as catalysts, followed by separation of the nine carbon olefins from the oligomer mixture, then hydroformylation of the 9 carbon olefins to 10 carbon aldehydes, and hydrogenation of the aldehydes to the corresponding alcohols. The mixtures, when esterified with phthalic acid, or anhydride, provide a mixture of isomeric di-decyl phthalates that can be used as plasticizers.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 14, 1996
    Assignee: Hoechst AG
    Inventors: Helmut Bahrmann, Wolfgang Greb, Peter Heymanns, Peter Lappe, Thomas Muller, Jurgen Szameitat, Ernst Wiebus
  • Patent number: 5512064
    Abstract: Fiber materials are modified with a polyalkyleneimine polymer at crosslinking agent, preferably glyoxal, and optionally dyed with water-soluble, anionic dyes, preferably reactive dyes. The dyeing process with fiber materials modified according to the invention can be carried out low-salt or completely without salt and also alkali-free or using only minimal amounts of alkali.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: April 30, 1996
    Assignee: Hoechst AG
    Inventors: Andreas von der Eltz, Joachim Clauss, Andreas Schrell
  • Patent number: 5510377
    Abstract: A sterilant gas mixture is presented for cold-gas sterilization, which comprises alkene oxide and 1,1,1,2,3,3,3-heptafluoropropane.The sterilant gas mixture comprises from 12 to 22 mol % of ethylene oxide or propylene oxide and from 78 to 88 mol % of 1,1,1,2,3,3,3-heptafluoropropane.
    Type: Grant
    Filed: January 11, 1995
    Date of Patent: April 23, 1996
    Assignee: Hoechst AG
    Inventors: Hans-Matthias Deger, Rainer Henrici, Ewald Preisegger
  • Patent number: 5510494
    Abstract: Process for the preparation of substituted and unsubstituted 2-(cyanomethyl)benzimidazoleA process for the preparation of substituted or unsubstituted 2-(cyanomethyl)benzimidazole, of the formula (I) ##STR1## which comprises reacting an o-phenylenediamine of the formula (II) ##STR2## in which R.sup.1 is C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, preferably methyl or methoxy, and n is an integer from 0 to 2, preferably 0 or 1, in particular 0, with a cyanoacetic ester of the formula (III)NC--CH.sub.2 --COOR.sup.2 (III)in which R.sup.2 is unsubstituted or substituted, linear, branched or cyclic C.sub.2 -C.sub.12 -alkyl and 1 to 3 CH.sub.2 groups of the alkyl radical can in each case be replaced by oxygen, at a temperature of 150.degree.-175.degree. C. in a halogen-free inert solvent whose boiling point is 150.degree. C. or more, or in a mixture of two or more of such solvents, without adding an aromatic sulfonic acid as catalyst.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: April 23, 1996
    Assignee: Hoechst AG
    Inventors: Erwin Dietz, Gustav Kapaun
  • Patent number: 5507972
    Abstract: To prepare a mixture of sodium silicates having lamellar structure and sodium carbonate peroxohydrate, sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 is reacted at least partially with carbon dioxide and atomized water with continuous circulation with the formation of a kanemite/sodium hydrogen carbonate mixture. The kanemite/sodium hydrogen carbonate mixture and further sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 is brought into contact with atomized water with continuous circulation. Finally, 0.015 to 1.5 mol of hydrogen peroxide per mole of sodium silicate composed essentially of .delta.-Na.sub.2 Si.sub.2 O.sub.5 employed is added to the resulting kanemite/sodium carbonate mixture.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: April 16, 1996
    Assignee: Hoechst AG
    Inventors: Harald Bauer, Gunther Schimmel
  • Patent number: 5501709
    Abstract: The present invention relates to a process for economy and plumping chrome tanning by admixing the pelts in the pickle bath with an aldehyde- and/or keto-carboxylic acid and then tanning, which comprises, prior to the addition of the aldehyde- and/or keto-carboxylic acid with or without other organic and/or inorganic acids, pretreating the delimed and bated pelts with an anionic, colloidal silicate solution.
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: March 26, 1996
    Assignee: Hoechst AG
    Inventor: Karlheinz Fuchs
  • Patent number: 5500323
    Abstract: Cyclic polysulfonyldiallylammonium salts which are obtainable bya) copolymerization of salts, preferably halides, of monomeric diallylammonium components of the formula (I) ##STR1## with sulfur dioxide or a compound which liberates sulfur dioxide, and b) anion exchange, the anions, preferably the halide ions, of the diallylammonium components being completely or partially replaced by the anions A, the diallylammonium components being in each case cyclized to give a five- or six-membered ring and being connected to one another by one or more divalent radicals --SO.sub.2 -- to form polymers, the polysulfonyldiallylammonium salts having a molecular weight of between 500 and 5,000,000,and the ratio of the number of diallylammonium components to the number of divalent SO.sub.2 radicals being from 1:0.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: March 19, 1996
    Assignee: Hoechst AG
    Inventors: Rudiger Baur, Hans-Tobias Macholdt, Wilfried Theiss
  • Patent number: 5500124
    Abstract: The invention relates to a process for the purifying working-up of liquid reaction media and/or wash media obtained during preparation of cellulose ethers, which are insoluble in hot water, from cellulose, an alkali metal hydroxide and at least one etherifying agent in a medium containing water and if appropriate at least one organic solvent, by ultrafiltration of the media into a permeate and concentrate, which comprises carrying out the ultrafiltration of the reaction media and/or wash media at a temperature at or above the flocculation temperature of the cellulose ethers.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: March 19, 1996
    Assignee: Hoechst AG
    Inventors: Heinz Wallisch, Reinhard Donges, Ulrich Meyer-Blumenroth