Patents by Inventor Alexander Dichtl

Alexander Dichtl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyglycol bis-[3-(7-tert-butyl-2-oxo-3-phenyl-3H-benzofuran-5-yl-)propanoyl] derivatives as stabilizers of organic material
    Patent number: 9328218
    Abstract: The invention relates to a compound of the formula (I-1) wherein n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 or 25, R1, R2, R3, R4, R5, R?1, R?2, R?3, R?4 and R?5 are each independently from each other H or C1-C8-alkyl. Compounds of the formula (I-1) or stabilizer mixtures containing compounds of the formula (I-1) are especially used for stabilization of polymers against degradation by oxidation, heat or light.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: May 3, 2016
    Assignee: BASF SE
    Inventors: Kai-Uwe Schoening, Cinzia Tartarini, Walid Al-Akhdar, Ulrich Berens, Bruno Rotzinger, Alexander Dichtl
  • POLYGLYCOL BIS-[3-(7-TERT-BUTYL-2-OXO-3-PHENYL-3H-BENZOFURAN-5-YL-)PROPANOYL] DERIVATIVES AS STABILIZERS OF ORGANIC MATERIAL
    Publication number: 20150191581
    Abstract: The invention relates to a compound of the formula (I-1) wherein n is 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 or 25, R1, R2, R3, R4, R5, R?1, R?2, R?3, R?4, and R?5 are each independently from each other H or C1-C8-alkyl. Compounds of the formula (I-1) or stabilizer mixtures containing compounds of the formula (I-1) are especially used for stabilization of polymers against degradation by oxidation, heat or light.
    Type: Application
    Filed: July 9, 2013
    Publication date: July 9, 2015
    Applicant: BASF SE
    Inventors: Kai-Uwe Schoening, Cinzia Tartarini, Walid Al-Akhdar, Ulrich Berens, Bruno Rotzinger, Alexander Dichtl
  • Process for the preparation of sterically hindered nitroxyl ethers
    Patent number: 8471031
    Abstract: The present invention relates to a novel process for the preparation of a sterically hindered nitroxyl ether from the corresponding sterically hindered nitroxyl radical by reacting it with a carbonyl compound and a hydroperoxide. The compounds prepared by this process are effective stabilizers for polymers against harmful effects of light, oxygen and/or heat, as flame-retardants for polymers and as polymerization regulators.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: June 25, 2013
    Assignee: BASF SE
    Inventors: Kai-Uwe Schöning, Walter Fischer, Abdel-Ilah Basbas, Alexander Dichtl
  • Process for the preparation of sterically hindered nitroxyl ethers
    Publication number: 20100249401
    Abstract: The present invention relates to a novel process for the preparation of a sterically hindered nitroxyl ether from the corresponding sterically hindered nitroxyl radical by reacting it with a carbonyl compound and a hydroperoxide. The compounds prepared by this process are effective stabilizers for polymers against harmful effects of light, oxygen and/or heat, as flame-retardants for polymers and as polymerization regulators.
    Type: Application
    Filed: June 25, 2007
    Publication date: September 30, 2010
    Inventors: Kai-Uwe Schöning, Walter Fischer, Abdel-Ilah Basbas, Alexander Dichtl