Patents Assigned to Clariant GmbH
  • Use of hydroxyl-containing copolymers for the preparation of fuel oils having improved lubricity
    Patent number: 6391071
    Abstract: The present invention relates to the use of oil-soluble copolymers which comprise A) from 5 to 80 mol-% of structural units derived from olefinically unsaturated compounds containing at least one free hydroxyl group, B) from 5 to 95 mol-% of structural units derived from olefinically unsaturated compounds carrying a hydrocarbon radical having at least 6 carbon atoms, and, if desired, C) from 0 to 40 mol-% of further structural units selected from the group consisting of acrylic acid, acrylates, vinyl esters, vinylethane and alkenes, with the proviso that the structural units mentioned under C) are different from the structural units mentioned under A) and B), and have a mean molecular weight Mw of from 500 to 100,000 g/mol and an OH number of from 10 to 300 mg of KOH/g, for improving the lubricity and cold flow properties of middle distillates having a sulfur content of less than 0.5% by weight.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: May 21, 2002
    Assignee: Clariant GmbH
    Inventors: Matthias Krull, Markus Kupetz
  • Wax blend for aqueous applications
    Patent number: 6391189
    Abstract: The present specification relates to wax blends comprising partial esters of polyols and montan wax acid, hydrocarbon wax, long-chain carboxylic acids and long-chain alcohols and to their use. With such blends it is possible, without water-soluble emulsifier and permanent soaps, to produce aqueous pastes which can be applied in use to leather surfaces to give water-resistant, non-tacky, elastic films without gray break. The drying times are shorter than with the known formulations, and the dried coat applied can easily be polished to highly glossy films.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: May 21, 2002
    Assignee: Clariant GmbH
    Inventor: Franz-Leo Heinrichs
  • Process for preparing 4-(4?-carboxyphenyl)pyridine
    Patent number: 6392051
    Abstract: The invention relates to a process for preparing 4-(4′-carboxyphenyl)pyridine, which comprises oxidizing a 4-phenyl-N-acyldihydropyridine of the formula (II) where R1 is a bulky alkyl, alkylaryl, arylalkyl or alkoxy group and R2 is a straight-chain or branched, substituted or unsubstituted alkyl radical having from 1 to 8 carbon atoms, by means of an oxidizing agent selected from the group consisting of permanganates, nitric acid, Cr(VI) compounds, oxygen and air to give the compound of the formula (I) where M is a cation.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: May 21, 2002
    Assignee: Clariant GmbH
    Inventors: Andreas Meudt, Stefan Scherer, Peter Koch, Gerhard Demmer, Frank Vollmüller
  • Cyan pigments in electrophotographic toners and developers
    Patent number: 6391507
    Abstract: The present invention relates to the use of a CuPc composition consisting essentially of CuPc, e.g., C.I. Pigment Blue 15:3, and a hydroxymethylphthalimido CuPc, as a colorant in electrophotographic toners and developers, powders and powder coating materials, electret materials, inkjet inks, and color filters, wherein the phthalocyanines have a particle morphology with an average length-to-width ratio of more than 2.5:1.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: May 21, 2002
    Assignee: Clariant GmbH
    Inventors: Hans-Tobias Macholdt, Ruediger Baur, Eduard Michel, Josef Geisenberger, Heidemarie Menzel, Andreas Harz
  • Colour-stable solution of dimethylaminoacetonitrile in water and process for preparing it
    Publication number: 20020058830
    Abstract: The present invention relates to a process for preparing a colour-stable, aqueous dimethylaminoacetonitrile solution from a formaldehyde source, dimethylamine and hydrocyanic acid, wherein the reaction mixture contains 2,4-diamino-6-phenyl-1,3,5-triazine (benzoguanamine) in a concentration of from 0.001 to 5% by weight, based on formaldehyde, prior to the reaction and the starting substances are used stoichiometrically or in a ratio of 0.98-1.02 mol of formaldehyde and 0.95-1.10 mol of dimethylamine per mol of hydrocyanic acid. The resulting product remains colour-stable without a further purification step even after prolonged storage.
    Type: Application
    Filed: March 5, 2001
    Publication date: May 16, 2002
    Applicant: Clariant GmbH
    Inventors: Rainer Fell, Gotz Wilbert, Thomas Stahrfeldt
  • Process for preparing phosphinic acids
    Patent number: 6388125
    Abstract: The present invention relates to a process for the preparation of phosphinic acids from alkali metal phosphinates, which comprises reacting alkali metal phosphinates in a polar solvent with an inorganic mineral acid and then separating off the phosphinic acid formed.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 14, 2002
    Assignee: Clariant GmbH
    Inventors: Hans-Peter Schmitz, Martin Sicken
  • Granular surfactant composition of improved flowability compromising sodium silicate and linear alkylbenzenesulfonates
    Patent number: 6387869
    Abstract: A granular surfactant composition comprising sodium silicate and linear alkylbenzenesulfonates, wherein the granular surfactant composition has a mean particle diameter of ≧50 &mgr;m and an ffc value of ≧7; a process for the preparation of this granular surfactant composition, its use, and detergents and cleaners which comprise such granular surfactant composition and a process for the making of the same; and, where appropriate, the granular surfactant composition comprises other active ingredients and auxiliaries.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: May 14, 2002
    Assignee: Clariant GmbH
    Inventors: Harald Bauer, Josef Holz, Gunther Schimmel
  • Process for preparing azo colorants
    Publication number: 20020055619
    Abstract: The invention provides a process for preparing azo colorants which comprises spraying one or more coupling components individually or in a mixture and one or more compatible diazonium salts individually or in a mixture, in their solution or suspension form through nozzles to a point of conjoint collision in a reactor chamber enclosed by a housing in a microjet reactor, a gas or an evaporating liquid being passed into the reactor chamber through an opening in the housing for the purpose of maintaining a gas atmosphere in the reactor chamber, and the resulting product solution or suspension and the gas or the evaporated liquid being removed from the reactor through a further opening in the housing by means of overpressure on the gas entry side or underpressure on the product and gas exit side.
    Type: Application
    Filed: October 5, 2001
    Publication date: May 9, 2002
    Applicant: Clariant GmbH
    Inventors: Erwin Dietz, Joachim Weber, Dieter Schnaitmann, Christian Wille, Leonhard Unverdorben, Klaus Saitmacher, Jorg Jung, Kristina Schiffer
  • Polymer oxidates and their use
    Patent number: 6384148
    Abstract: The present invention relates to polymer oxidates prepared by reacting polyethylene which has been obtained using metallocene catalysts and which has a weight-average molar mass above 40,000 g/mol with oxygen or oxygen-containing gas mixtures. These polymer oxidates have high suitability for preparing aqueous dispersions, as a material added when dispersing pigments in masterbatches, or for surface-modification or for polar modification of polyolefins. Another advantageous application sector is use as an additive, e.g. as a lubricant for plastics processing.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 7, 2002
    Assignee: Clariant GmbH
    Inventors: Hans-Friedrich Herrmann, Gerd Hohner
  • Molding composition for producing powder metallurgical or ceramic products
    Patent number: 6383281
    Abstract: The present invention relates to a molding composition based on sinterable materials, comprising a) from 80 to 99.5% by weight of sinterable powder having a maximum particle size of 2000 &mgr;m, b) from 0.5 to 20% by weight of metallocene polyolefin wax, c) if desired, up to 19.5% by weight of a further dry lubricant, and to its use for producing shaped ceramic and powder metallurgical parts by pressing.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: May 7, 2002
    Assignee: Clariant GmbH
    Inventor: Michael Bayer
  • Hydroxyl-containing ethylene copolymers and fuel oils having an improved lubricating action
    Patent number: 6384170
    Abstract: The invention relates to copolymers of ethylene and at least one further olefinically unsaturated comonomer containing one or more hydroxyl groups. The invention furthermore relates to fuel oils comprising middle distillates containing a maximum of 0.5% by weight of sulfur and at least one copolymer of ethylene and at least one further olefinically unsaturated comonomer containing one or more hydroxyl groups.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: May 7, 2002
    Assignee: Clariant GmbH
    Inventors: Matthias Krull, Markus Kupetz, Raimund Wildfang
  • Process for preparing optically active cyanohydrins and secondary products
    Publication number: 20020052523
    Abstract: The present invention relates to a process for preparing optically active cyanohydrins of the formula (II), 1
    Type: Application
    Filed: November 1, 2001
    Publication date: May 2, 2002
    Applicant: Clariant GmbH
    Inventors: Bettina Kirschbaum, Gotz Wilbert, Franz Effenberger
  • Process for preparing an enzyme extract
    Publication number: 20020052039
    Abstract: The present invention relates to a process for preparing an (R)-hydroxynitrile lyase extract by extracting an (R)-hydroxynitrile lyase-containing natural product with water in the absence or presence of a buffer at a pH of 3.3 to 5.5.
    Type: Application
    Filed: November 1, 2001
    Publication date: May 2, 2002
    Applicant: Clariant GmbH
    Inventors: Bettina Kirschbaum, Gotz Wilbert, Franz Effenberger
  • Process for producing flame-retardant flexible polyurethane foams
    Patent number: 6380273
    Abstract: The invention relates to a process for the production of flame-resistant flexible polyurethane foams having a low susceptibility to core discoloration, which comprises using hydroxyalkyl phosphonates as halogen-free flame retardants and as core discoloration inhibitors. The invention furthermore relates to the use of hydroxyalkyl phosphonates as halogen-free flame retardants for the production of flame-resistant flexible polyurethane foams having a low susceptibility to core discoloration. Finally the invention also relates to a flame resistant flexible polyurethane foam having a low susceptibility to core discoloration which comprises hydroxyalkyl phosphonates as halogen-free flame retardants and as core discoloration inhibitor.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: April 30, 2002
    Assignee: Clariant GmbH
    Inventors: Christian Eilbracht, Martin Sicken
  • Copolymers and their use as drilling aids
    Patent number: 6380137
    Abstract: The invention provides water-soluble copolymers without crosslinking, consisting of the following components: A 5-95% by weight of bivalent structural units derived from acrylamidopropenylmethylenesulfonic acid or its salts, B 1-45% by weight of bivalent structural units derived from open-chain N-vinylamides, C 1-45% by weight of bivalent structural units derived from cyclic N-vinyl-substituted amides, and if desired D 0-50% by weight of a further comonomer selected from the group consisting of acrylamide, acrylic acid and acrylonitrile, the components A to C and, if present, D adding up to 100% by weight.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: April 30, 2002
    Assignee: Clariant GmbH
    Inventors: Karl Heinz Heier, Roman Morschhäuser, Aranka Tardi, Susanne Weber, Gernold Botthof
  • Antimicrobial siloxane quat formulations and their preparation and use
    Patent number: 6376696
    Abstract: Disclosed is a process for preparing an antimicrobial formulation by reacting a compound of the formula 1 (R1O)3Si—(CH2)3—X  (1) with a compound of the formula 2 (H3C)NR2R3  (2) where R1 is C1-C4-alkyl R2 is C8-C20-alkyl R3 is methyl or C8-C20-alkyl X is Cl or Br, excluding iodides, in a molar ratio of (1):(2)=1:0.9 to 1:1.4, which comprises conducting said reaction in a solvent conforming to the formula 3 where R4 is C1-C4-alkyl R5 is H or methyl R6 is H or methyl m is 2, 3, 4 or 5, subject to the proviso that when m is 2 R4 and R6 are not both methyl, and not removing this solvent after said reaction, or adding this solvent after said reaction. Further disclosed is an antimicrobial formulation obtainable by the process described above.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: April 23, 2002
    Assignee: Clariant GmbH
    Inventors: Klaus Raab, Walter Bender
  • Use of a powder composition for hydrophobicizing construction compositions
    Publication number: 20020045692
    Abstract: The invention relates to the use of a powder composition which comprises at least one carboxylic ester, for hydrophobicizing construction compositions.
    Type: Application
    Filed: October 2, 2001
    Publication date: April 18, 2002
    Applicant: Clariant GmbH
    Inventors: Wolfgang Fiedler, Ulrich Geissler, Ludwig Schmitz
  • Finely divided crystalline sodium disilicate
    Patent number: 6372709
    Abstract: The invention relates to a finely divided crystalline layered sodium disilicate of the formula NaMSixO2x+1.yH2O, where M is sodium or hydrogen, x is a number from 1.9 to 4, and y is a number from 0 to 20, which comprises from 0 to 40% by weight of alpha-disodium disilicate from 0 to 40% by weight of beta-disodium disilicate from 40 to 100% by weight of delta-disodium disilicate from 0 to 40% by weight of amorphous components, to a process for its preparation and to its use.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: April 16, 2002
    Assignee: Clariant GmbH
    Inventors: Harald Bauer, Josef Holz, Günther Schimmel
  • Compound for inhibiting corrosion
    Patent number: 6372918
    Abstract: The invention relates to compounds of the formula 1 R1—O—(A—O)x—(CH2)y—R2  (1) in which R1 is branched or straight-chain C4-C30-alkyl, C4-C30-alkenyl or C4-C30-alkylaryl, A is C2-C4-alkylene, x is an integer from 1 to 100, y is 1, 2, 3 or 4 and R2 is a radical selected from structures of the formulae 2 and 3 —CO—NR3R4  (2) in which one of the radicals R3 and R4 is a hydrocarbon chain which has at least one free NH or NH2 group and the other radical is hydrogen or a hydrocarbon chain which has at least one free NH or NH2 group and R5 is hydrogen or a hydrocarbon chain which has at least one free NH or NH2 group.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: April 16, 2002
    Assignee: Clariant GmbH
    Inventors: Michael Feustel, Peter Klug
  • Process for fine division of organic pigments
    Publication number: 20020040663
    Abstract: The invention provides a process for the fine division of pigments which comprises spraying a coarsely crystalline crude pigment and/or a poorly dispersible prepigment in suspension form through nozzles to a point of conjoint collision in a reactor chamber enclosed by a housing in a microjet reactor, a gas or an evaporating liquid being passed into the reactor chamber through an opening in the housing for the purpose of maintaining a gas atmosphere in the reactor chamber, and the resulting pigment suspension and the gas or the evaporated liquid being removed from the reactor through a further opening in the housing by means of overpressure on the gas entry side or underpressure on the product and gas exit side.
    Type: Application
    Filed: October 5, 2001
    Publication date: April 11, 2002
    Applicant: Clariant GmbH
    Inventors: Erwin Dietz, Joachim Weber, Dieter Schnaitmann, Christian Wille, Leonhard Unverdorben