Patents Assigned to Clariant GmbH
  • Process for the preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and similar compounds
    Patent number: 6258984
    Abstract: Process for the preparation of 4-alkylsulfonyl-1-alkyl-2-chlorobenzenes and like compounds. A process for the preparation of 4-alkyl(C1-C4)-sulfonyl-1-alkyl-2-chlorobenzenes, in very good yields and with high selectivity by selectively chlorinating a p-alkyl-benzenesulfonyl chloride with gaseous chlorine in the presence of a chlorine carrier at 50° C. to 100° C. to give a compound of the formula in which R1 is an alkyl (C1-C4) group, subsequently reducing the latter in an aqueous medium at a pH of 8 to 10 with sodium hydrogen sulfite or sodium sulfite at 40 to 90° C. to give a compound of the formula and reacting the latter with alkyl(C1-C4) chloride in the presence of an acid binder at 80 to 150° C., and also compounds of the last mentioned formula which, instead of the —SO2Na group contain the —SO2X group (X=hydrogen atom or alkali metal atom).
    Type: Grant
    Filed: August 12, 1993
    Date of Patent: July 10, 2001
    Assignee: Clariant GmbH
    Inventors: Georg Folz, Theodor Papenfuhs
  • Use of comb polymers as soil release polymers
    Patent number: 6255274
    Abstract: The use of comb polymers obtained by condensation of a) a polycarboxylic acid or a polyalcohol b) one or more optionally sulfo-substituted polyalcohols having 2 to 4 OH groups or polyglycols of the formula HO—(XO)a—H, in which X is C2H4 and/or C3H7 and a is a number from 2 to 35, preferably from 2 to 5, c) one or more optionally sulfonated C2-C10-dicarboxylic acids and d) one or more compounds of the formulae NH2R, NHR2, ROH, R1COOH, HO(XO)b—H and HO(CH2CH2)dSO3K, in which R is C1-C22-alkyl or C6-C10-aryl, R1 is C1-C22-alkyl, C1-C22-sulfoalkyl, C6-C10-aryl or C6-C10-sulfoaryl, X is C2H4 and/or C3H7, b is a number from 3 to 40, preferably 3 to 20, d is a number from 1 to 10, preferably 1 to 4, and K is a cation, as soil release polymers.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: July 3, 2001
    Assignee: Clariant GmbH
    Inventors: Johannes Becherer, Frank-Peter Lang, Bernhard Mees, Roman Morschhäuser
  • Flame-retardant combination
    Patent number: 6255371
    Abstract: The invention relates to a novel flame retardant combination comprising, as component A, a phosphinate of the formula (I) and/or a diphosphinate of the formula (II) and/or polymers of these where R1 and R2 are identical or different and are C1-C6-alkyl, linear or branched, and/or aryl; R3 is C1-C10-alkylene, linear or branched, C6-C10-arylene, -alkylarylene or -arylalkylene; M is calcium ions, magnesium ions, aluminum ions and/or zinc ions, preferably aluminium or zinc; m is 2 or 3; n is 1 or 3; x is 1 or 2; and comprising, as component B, condensation products of melamine and/or reaction products of melamine with phosphoric acid and/or reaction products of condensation products of melamine with phosphoric acid and/or comprising a mixture of these. The invention also relates to the use of the abovementioned flame retardant combination, especially in thermoplastic polymers.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: July 3, 2001
    Assignee: Clariant GmbH
    Inventors: Elke Schlosser, Bernd Nass, Wolfgang Wanzke
  • Flame-retartant coating
    Patent number: 6251961
    Abstract: The invention relates to a flame-retardant coating which forms an insulating layer and is based on substances which carbonize and form a foam layer in the event of a fire, on film-forming binders, on blowing agents and on customary auxiliaries and additives, wherein the blowing agent present comprises melamine polyphosphate. The novel flame-retardant coating which forms an insulating layer is particularly stable under tropical conditions (up to 100% rel. humidity, about 75° C.), i.e. it releases only an extremely small amount of NH3.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: June 26, 2001
    Assignee: Clariant GmbH
    Inventors: Wolf-Dieter Pirig, Volker Thewes
  • Use of mixed-crystal pigments of the quinacridone series in electrophotographic toners and developers, powder coatings and inkjet inks
    Patent number: 6251553
    Abstract: The use of mixed-crystal pigments of the quinacridone series consisting of a) from 85 to 99% by weight of unsubstituted &bgr;-phase quinacridone of the formula (I) in which R1 and R2 are hydrogen atoms, and b) from 1 to 15% by weight of one or more substituted quinacridones of the formula (I) in which the substituents R1 and R2 are identical or different and are chlorine, bromine or fluorine atoms or C1-C4-alkyl, C1-C4-alkoxy or carboxamido groups, which can be substituted by C1-C6-alkyl groups, and R1 can additionally be hydrogen, as colorants in electrophotographic toners and developers, powder coating materials, inkjet inks, electret fibers, and color filters.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: June 26, 2001
    Assignee: Clariant GmbH
    Inventors: Ruediger Baur, Manfred Urban, Hans-Tobias Macholdt, Dieter Schnaitmann, Martin Boehmer
  • Molding composition for producing powder metallurgical or ceramic products
    Publication number: 20010004138
    Abstract: The present invention relates to a molding composition based on sinterable materials, comprising
    Type: Application
    Filed: December 15, 2000
    Publication date: June 21, 2001
    Applicant: Clariant GmbH
    Inventor: DI. Michael Bayer
  • Process for preparing arylpyridines
    Patent number: 6248892
    Abstract: 2-, 3- or 4-arylpyridines are prepared by reacting a halopyridine with an aryl Grignard compound, where the halogen is chlorine or bromine, in the presence of a palladium catalyst of the formula (IV)
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: June 19, 2001
    Assignee: Clariant GmbH
    Inventors: Antje Noerenberg, Steffen Haber, Andreas Meudt
  • Process for preparing salts of dialkylphosphinic acids
    Patent number: 6248921
    Abstract: The invention relates to a process for preparing salts of dialkylphosphinic acids, which comprises a) reacting alkylphosphonous and/or hypophosphorous acid and/or alkali metal salts thereof with olefins in the presence of a free-radical initiator to give dialkylphosphinic acids and/or alkali metal salts thereof and b) reacting the dialkylphosphinic acids and/or alkali metal salts thereof obtained according to a) with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na and/or K to give the metal dialkylphosphinate salts. The invention likewise relates to the use of the metal dialkylphosphinate salts prepared by the process according to the invention for preparing flame retardants.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: June 19, 2001
    Assignee: Clariant GmbH
    Inventors: Norbert Weferling, Hans-Peter Schmitz, Günter Kolbe
  • Method of producing 2,4-dichloro-5-hydroxyacetanilide
    Patent number: 6242646
    Abstract: The present invention relates to a process for preparing 2,4-dichloro-5-hydroxyacetanilide by reacting 3-hydroxyacetanilide with sulfuryl chloride in the presence of from 3 to 30 parts by weight of an aliphatic carboxylic acid having from 1 to 6 carbon atoms per part by weight of 3-hydroxyacetanilide with vigorous mixing at from 20 to 100° , removing gaseous components from the reaction mixture, setting a ratio of from 1.0 to 6 parts by weight of aliphatic carboxylic acid per part by weight of 3-hydroxyacetanilide employed and removing 2,4-dichloro-5-hydroxyacetanilide as a solid.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: June 5, 2001
    Assignee: Clariant GmbH
    Inventors: Frank Sistig, Hans-Jürgen Leitung, Stefan Krause
  • Process for preparing quinacridone pigments
    Patent number: 6241814
    Abstract: Linear unsubstituted and substituted quinacridone pigments and quinacridone mixed-crystal pigments are obtained by cyclizing dianilinoterephthalic acid with polyphosphoric acid and then hydrolyzing the ring closure mixture, said mixture being metered into an amount of water or orthophosphoric acid which is such that the final orthophosphoric acid concentration is greater than or equal to 50% by weight in the hedrolysis mixture.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: June 5, 2001
    Assignee: Clariant GmbH
    Inventors: Manfred Urban, Martin Boehmer, Dieter Schnaitmann, Joachim Weber
  • Process for preparing arylalphosphinic acids
    Patent number: 6242642
    Abstract: The invention relates to a process for preparing arylalkyiphosphinic acids and/or alkali metal salts thereof by reacting olefins with arylphosphonous acids and/or alkali metal salts thereof, which comprises carrying out the reaction in the presence of a free-radical initiator. The invention also relates to the use of the products prepared by the abovementioned process for preparing flame retardants.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: June 5, 2001
    Assignee: Clariant GmbH
    Inventors: Norbert Weferling, Hans-Peter Schmitz
  • Alkali-metal-carboxylate-containing drilling fluid having improved corrosion properties
    Patent number: 6239081
    Abstract: The present invention relates to water-based drilling fluids having decreased corrosion properties which comprise, in addition to alkali metal carboxylates, boron compounds and, if appropriate, clays, polymers and coinhibitors.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: May 29, 2001
    Assignee: Clariant GmbH
    Inventors: Joachim Korzilius, Peter Minks
  • Process for preparing metal salts of arylalkylphosphinic acids
    Patent number: 6232493
    Abstract: The invention relates to a process for preparing metal salts of arylalkylphosphinic acids, which comprises: a) reacting olefins with arylphosphonous acids or alkali metal salts thereof in the presence of a cationic free-radical initiator, and b) reacting the arylalkylphosphinic acids or alkali metal salts thereof obtained by a) with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na and/or K to give the metal arylalkylphosphinate salts. The invention also relates to the use of the products prepared by the abovementioned process for preparing flame retardants.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: May 15, 2001
    Assignee: Clariant GmbH
    Inventors: Norbert Weferling, Hans-Peter Schmitz
  • Fluorinated azoles, and their use in liquid-crystalline mixtures
    Patent number: 6231786
    Abstract: In the fluorinated azoles of the formula (I) R1(—A1)a—T—(A2—)b(M—A3—)cR2   (I) the symbols and indices have -the following meanings: T is undirected and is 4-fluorothiazole-2,5-diyl, 5-fluorothiazole-2,4-diyl, 4-fluorooxazole-2,5-diyl, 5-fluorooxazole-2,4-diyl or 4-fluoroisoxazole-2,5-diyl; R1 and R2 are identical or different and are hydrogen or a straight-chain or branched C1-20-alkyl or C2-20-alkenyl radical (with or without asymmetrical carbon atoms); A1, A2 and A3 are identical or different and are, for example, phenylene-1,4-diyl or cyclohexane-1,4-diyl; M is undirected and is —OC(═O)—, —OCH2—, —CH2CH2—, —OC(═O)CH2CH2—, —OCH2CH2CH2—, —C≡C—, —CH2CH2CH2CH2— or a single bond; a, b and c, independently of one another, are 0 or 1, with the proviso that the sum a+b+c is 1 or 2.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: May 15, 2001
    Assignee: Clariant GmbH
    Inventors: Rainer Wingen, Barbara Hornung, Ayako Ogawa, Wolfgang Schmidt
  • Process for preparing new crystal modifications of C.I. pigment red 53:2
    Patent number: 6228162
    Abstract: C.I. Pigment Red 53:2 is obtained in new crystal modifications (epsilon, zeta, eta, theta, iota, kappa, lambda, nu, xi, omicron, pi and rho phases) by heating any other phase of this pigment in certain organic solvents and reprecipitating the pigment. The new crystal phases differ from one another in rheology and coloristics.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: May 8, 2001
    Assignee: Clariant GmbH
    Inventor: Martin U. Schmidt
  • Oligomeric stabilizer mixture
    Patent number: 6225385
    Abstract: The present invention relates to a stabilizer mixture prepared by partially condensing PCl3 with 2,2′-dimethyl-4,4′-dihydroxy-5,5′-di-tert-butyldiphenyl sulfide, where the phosphorus content is from 2 to 4% by weight and the content of 2,2′-dimethyl-4,4′-dihydroxy-5,5′-di-tert-butyldiphenyl sulfide is from 0.5 to 50% by weight. The stabilizer mixture has very good solubility in organic solvents and in the polymer and has very good stabilizing action.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: May 1, 2001
    Assignee: Clariant GmbH
    Inventors: Thomas Stährfeldt, Alexander Lichtblau, Gerhard Pfahler, Karl Gaa
  • Perylene compounds and pigment preparations
    Patent number: 6221150
    Abstract: The present invention relates to pigment dispersants of the formula (I) in which Z1 is a radical of the formula (Ia) —[X—Y]q—[X1—Y1]r—[X2—NH]sH  (Ia) in which X, X1 and X2 are identical or different and are a branched or unbranched C2-C6-alkylene radical or a C5-C7-cycloalkylene radical which can be substituted by from 1 to 4 C1-C4-alkyl radicals, hydroxyl radicals, and/or by from 1 to 2 further C5-C7-cycloalkyl radicals; Y and Y1 are identical or different and are an NH—, —O— or N(C1-C6-alkyl) group, q is a number from 1 to 6, r and s independently of one another are a number from 0 to 6, but are not simultaneously zero; and Z is defined as Z1, Z2 or Z3, where Z2 is a radical of the formula (Ib) —[X—O]q1—[X1—O]qH  (Ib) in which q1 is a number from 0 to 6, and Z3 is hydrogen, hydroxyl, amino or C1-C6-alkyl where the alkyl group can
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: April 24, 2001
    Assignee: Clariant GmbH
    Inventors: Joachim Weber, Manfred Urban, Erwin Dietz
  • Process for the preparation of 3-isochromanoes by cyclization of o-chloromethylphenylacetic acids
    Patent number: 6215006
    Abstract: The present invention relates to a process for the preparation of a 3-isochromanone of the formula (I) by reaction of an o-chloromethylphenylacetic acid of the formula (II) at a temperature of 100 to 250° C. in the presence or absence of an ionic halide, in the presence or absence of an organic solvent with and removal of hydrogen chloride, where in the formulae (I) and (II) the radicals R1, R2, R3 and R4 independently of one another are: a hydrogen or fluorine atom; an NC or F3C group; an alkyl alkoxy or acyloxy radical, each having 1 to 18 carbon atoms; or a C6-C18-aryloxy, aryl or heteroaryl radical, 1 to 3 atoms from the group consisting of O, N and/or S being present as heteroatoms; or in which at least two of the radicals R1, R2, R3 and R4 are linked to one another and form at least one aliphatic or aromatic ring having 5 to 18 carbon atoms.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: April 10, 2001
    Assignee: Clariant GmbH
    Inventor: Holger Geissler
  • Bleach activator granules
    Patent number: 6214785
    Abstract: What is claimed are bleach activator granules which are obtained by mixing a bleach activator with a binder and x% by weight of the total amount of a water-soluble polymer, spraying of water which comprises 100-x% by weight of the total amount of the water-soluble polymer, where x is a number from 0 to 100, and subsequent granulation and drying.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: April 10, 2001
    Assignee: Clariant GmbH
    Inventors: Johannes Himmrich, Jürgen Cramer
  • Process for the oxidation of polyethylene waxes
    Patent number: 6211303
    Abstract: The present invention relates to a process for the oxidation, in the melt by means of oxygen or oxygen-containing gas mixtures, of ethylene homopolymer and copolymer waxes prepared using metallocene catalysts, wherein the oxidation of the polyethylene wax is carried out with addition of monobasic or polybasic inorganic acids or monobasic or polybasic carboxylic acids having from 1 to 6 or from 2 to 6 carbon atoms. The process gives waxes having a low melt viscosity and a light color.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: April 3, 2001
    Assignee: Clariant GmbH
    Inventor: Gerd Hohner