Patents Assigned to Clariant GmbH
  • Process for preparing aromatic amines in the presence of palladaphosphacyclobutane catalysts
    Patent number: 6353136
    Abstract: Aromatic amines of the formula (I) Ar—[NR6R7]n  (I) are prepared by reacting a haloaromatic of the formula (II) Ar—Hal  (II) with an amine of the formula (III) R6R7NH  (III) in the presence of a palladaphosphacyclobutane and a base and in the presence or absence of an ionic halide in a solvent at temperatures of from 20 to 200° C.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: March 5, 2002
    Assignee: Clariant GmbH
    Inventors: Holger Geissler, Steffen Haber, Stefan Scherer, Andreas Meudt, Frank Vollmueller
  • Dispersion powders comprising partially acetalized, water-soluble polyvinyl alcohols, the use of these, and process for their preparation
    Patent number: 6350808
    Abstract: The present invention relates to dispersion powders comprising a) at least one base polymer from the group consisting of the vinyl ester, vinyl ester comonomer, vinyl ester/ethylene, (meth)acrylate and styrene/acrylate polymers, b) from 1 to 25% by weight, based on the base polymer, of at least one protective colloid, c) from 1 to 25% by weight, based on the base polymer, of at least one partially acetalized, water-soluble polyvinyl alcohol, d) from 0 to 20% by weight, based on the total polymer weight, of anticaking agent and e) if required, further additives, the use of these, and process for their preparation.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: February 26, 2002
    Assignee: Clariant GmbH
    Inventors: Ludwig Schmitz, Michael Schottler, Robert Fuss
  • Process for the preparation of isochroman-3-ones
    Patent number: 6348603
    Abstract: The present invention relates to a process for the preparation of an isochroman-3-one of the formula (I) by reaction of a 1,2-bishalomethylbenzene of the formula (II) in which X is chlorine, bromine or iodine, with carbon monoxide and a compound of the formula (III) R5R6R7C—OH  (III) at a CO pressure of 0.1 to 50 MPa and a temperature of 20 to 200° C.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: February 19, 2002
    Assignee: Clariant GmbH
    Inventors: Holger Geissler, Ralf Pfirmann
  • Process for separating hydrogen chloride from a mixture comprising an N-alkyl-2-pyrrolidone and hydrogen chloride
    Publication number: 20020014399
    Abstract: The present invention relates to a process for separating hydrogen chloride from a mixture comprising an N-(C1-C18)-alkyl-2-pyrrolidone and hydrogen chloride by distilling the mixture comprising an N-(C1-C18)-alkyl-2-pyrrolidone and hydrogen chloride at from 100 to 220° C. and from 50 to 850 hPa in the presence of water by means of a distillation column, condensing the water as water-hydrogen chloride azeotrope at the top by cooling, returning the water-hydrogen chloride azeotrope to the distillation column, separating off gaseous hydrogen chloride at the top and taking off the N-(C1-C18)-alkyl-2-pyrrolidone from the bottom.
    Type: Application
    Filed: June 27, 2001
    Publication date: February 7, 2002
    Applicant: Clariant GmbH
    Inventor: Holger Geissler
  • Bleaching-active dendrimer ligands and metal complexes thereof
    Publication number: 20020016277
    Abstract: Compounds of the formula
    Type: Application
    Filed: April 20, 2001
    Publication date: February 7, 2002
    Applicant: Clariant GmbH
    Inventors: Claudia Fischer, Jorg Issberner, Fritz Vogtle
  • Flame retardant combinations for thermoplastic polymers II
    Patent number: 6344158
    Abstract: The invention relates to a flame retardant combination for thermoplastic polymers comprising, as component A, a salt of 1-hydroxydihydrophosphole oxides of formula (Ia) or formula (Ib) and/or 1-hydroxyphospholane oxides of formula (II), and, as component B, a synthetic inorganic compound and/or a mineral product.
    Type: Grant
    Filed: January 29, 2000
    Date of Patent: February 5, 2002
    Assignee: Clariant GmbH
    Inventors: Elke Schlosser, Bernd Nass, Wolfgang Wanzke
  • Colorant mixture
    Publication number: 20020011179
    Abstract: A colorant mixture of C.I. Acid Red 289 and C.I. Reactive Red 23 and optionally a shading colorant is used for magenta recording fluids.
    Type: Application
    Filed: July 3, 2001
    Publication date: January 31, 2002
    Applicant: Clariant GmbH
    Inventors: Heidemarie Menzel, Josef Geisenberger, Andreas Wuzik
  • Hair-treatment compositions
    Publication number: 20020012650
    Abstract: The invention provides hair-treatment compositions which comprise at least one quaternary ammonium compound and a pearly luster concentrate comprising a lusterizing component and nonionic, amphoteric and/or zwitterionic surfactants and water. In a preferred embodiment, the pearly luster concentrates comprise titanium dioxide.
    Type: Application
    Filed: March 12, 2001
    Publication date: January 31, 2002
    Applicant: Clariant GmbH
    Inventor: Sonja Klein
  • Aqueous or aqueous-alcoholic body cleansing compositions comprising sorbitol esters
    Publication number: 20020010112
    Abstract: Aqueous or aqueous-alcoholic body cleansing compositions comprising sorbitol esters obtained by transesterification of optionally oxalkylated sorbitol with fatty acid methyl esters or fatty acid triglycerides and optional oxalkylation of the reaction products obtained by transesterification with fatty acid methyl esters. The sorbitol esters serve as solubilizing agents of active ingredients, as stabilizer, and as care and refatting components.
    Type: Application
    Filed: March 5, 2001
    Publication date: January 24, 2002
    Applicant: Clariant GmbH
    Inventors: Torsten Henning, Vera Mulitze-Kleinheyer
  • Preparation of diketopyrrolopyrrole pigments
    Publication number: 20020010331
    Abstract: A process for preparing diketopyrrolopyrrole pigments comprises conducting the elementary steps of pigment synthesis (reaction and hydrolysis) in a miniaturized continuous reactor.
    Type: Application
    Filed: June 5, 2001
    Publication date: January 24, 2002
    Applicant: Clariant GmbH
    Inventors: Uwe Nickel, Leonhard Unverdorben, Joachim Weber, Erwin Dietz, Juergen Patzlaff
  • Process for preparing highly pure formylphenyboronic acids
    Publication number: 20020010332
    Abstract: A process for purifying formylphenylboronic acids of the formula (I) 1
    Type: Application
    Filed: July 2, 2001
    Publication date: January 24, 2002
    Applicant: Clariant GmbH
    Inventors: Frank Vollmuller, Andreas Meudt, Stefan Scherer
  • Aqueous or aqueous-alcoholic body-cleansing compositions comprising oligoesters
    Publication number: 20020006882
    Abstract: Body-cleansing compositions are claimed which comprise oligoesters obtained by condensation of one or more dicarboxylic acids or esters thereof and one or more polyhydric alcohols.
    Type: Application
    Filed: January 26, 2001
    Publication date: January 17, 2002
    Applicant: Clariant GmbH
    Inventors: Matthias Loffler, Vera Mulitze-Kleinheyer
  • Preparation of trans-thiazineindigo plgments
    Publication number: 20020004596
    Abstract: A process for preparing symmetrical or asymmetrical trans-thiazineindigo pigments of the formula (1) 1
    Type: Application
    Filed: June 21, 2001
    Publication date: January 10, 2002
    Applicant: Clariant GmbH
    Inventors: Petra Maria Rothe, Leonhard Unverdorben, Bruno Piastra
  • Multifunctional additive for fuel oils
    Publication number: 20020002793
    Abstract: The invention relates to additives for improving cold-flow and lubricating properties of fuel oils, comprising
    Type: Application
    Filed: January 11, 2001
    Publication date: January 10, 2002
    Applicant: Clariant GmbH
    Inventors: Matthias Krull, Werner Reimann
  • Polypropylene wax
    Patent number: 6331590
    Abstract: The present invention relates to homopolymer and copolymer waxes which have been prepared by polymerization using metallocene compounds in the presence of hydrogen and have a melt viscosity of less then 100 mPas, measured at 170° C. As a result of their high thermal stabillty, these waxes display neither discoloration nor crosslinking reactions and are vary well suited for use in toners, for plastics processing, for masterbatches, for printing inks, surface coatings and melt adhesives.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: December 18, 2001
    Assignee: Clariant GmbH
    Inventors: Hans-Friedrich Herrmann, Gerd Hohner
  • Polyvinyl ester dispersions and methods for their preparation
    Patent number: 6331587
    Abstract: Polyvinyl ester dispersions which can be employed as binders in building materials, preferably in the form of redispersible plastics powders, are obtained by polymerization of at least one vinyl ester and optionally other monomers which can be copolymerized with vinyl ester, by use of water-soluble cationic azo initiator.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: December 18, 2001
    Assignee: Clariant GmbH
    Inventor: Ulrich Geissler
  • Ortho substituted benzaldehydes, preparation thereof and use thereof
    Publication number: 20010050352
    Abstract: Compounds of the formula (I) 1
    Type: Application
    Filed: May 10, 2001
    Publication date: December 13, 2001
    Applicant: Clariant GmbH
    Inventors: Rainer Wingen, Wolfgang Schmidt
  • Process for preparing dialkylphosphinic acids
    Patent number: 6329544
    Abstract: The invention relates to a process for preparing dialkylphosphinic acids and/or alkali metal salts thereof by reacting olefins with alkylphosphonous and/or hypophosphorous acid and/or alkali metal salts thereof, which comprises carrying out the reaction in the presence of a azo 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: March 10, 2000
    Date of Patent: December 11, 2001
    Assignee: Clariant GmbH
    Inventors: Norbert Weferling, Hans-Peter Schmitz, Günter Kolbe
  • Process for the preparation of ether carboxylic acids with low residual alcohol content
    Patent number: 6326514
    Abstract: The invention provides a process for the preparation of ether carboxylic acids or alkali metal or ammonium salts thereof with low residual alcohol content, which comprises firstly converting a mono- or polyhydric alcohol into the corresponding alkoxide using a substoichiometric amount between 5 and 95 mol % of a basic compound, and then reacting the alkoxide with alkylene oxides, and, if necessary after distilling off the residual alcohol which remains, alkylating the highly alkaline reaction mixture, which comprises more than 5 mol % of alkoxylated alkoxides, directly with a chloroacetic acid derivative, and, if necessary, converting the alkylated product into the free ether carboxylic acid by acidification with mineral acid.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: December 4, 2001
    Assignee: Clariant GmbH
    Inventors: Peter Klug, Rainer Kupfer, Ignaz Wimmer, Rüdiger Winter
  • Wax preparation comprising partial esters of polyols and montan wax acid and Ca soaps of montan wax acid
    Patent number: 6316650
    Abstract: The present invention relates to a wax mixture comprising a) 10-80% by weight of partial esters of polyols with carboxylic acids or carboxylic acid mixtures having a chain length of C16-C36; b) 0-30% by weight of partial esters of polyols with polybasic carboxylic acids having a chain length of C4-C36; and c) 20-90% by weight of alkaline earth metal soaps of the abovementioned carboxylic acids or carboxylic acid mixtures, with the proviso that 1,2-ethanediol and 1,3-butanediol are excluded. The wax mixtures are highly suitable for the preparation of solvent pastes as a single component or in combination with synthetic, natural or semi-synthetic wax-like products, as lubricants or release agents in plastic or metal processing, and for the preparation of microfine wax powders.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: November 13, 2001
    Assignee: Clariant GmbH
    Inventors: Franz-Leo Heinrichs, Monika Drechsler, Werner Kapfer, Andree Henze