Patents by Inventor Rudolf Pfaendner

Rudolf Pfaendner 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).

  • Publication number: 20240254316
    Abstract: The invention relates to the use of at least one sulfur-containing amino acid for stabilizing recycled thermoplastics, in particular against oxidative, thermal, and/or actinic degradation, to a recycled thermoplastic composition containing or consisting of at least one recycled thermoplastic and at least one sulfur-containing amino acid, to a molded part which can be produced from the recycled thermoplastic composition according to the invention, to a stabilizer composition, to a masterbatch, and to a stabilizing method, in particular an oxidative, thermal, and/or actinic stabilizing method for stabilizing recycled thermoplastics by adding or incorporating at least one sulfur-containing amino acid, a stabilizer composition according to the invention, or a masterbatch according to the invention to a recycled thermoplastic.
    Type: Application
    Filed: May 18, 2022
    Publication date: August 1, 2024
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Rudolf PFAENDNER, Jannik MAYER, Elke METZSCH-ZILLIGEN
  • Publication number: 20240182674
    Abstract: The invention relates to a new type of stabilizer composition for stabilizing halogen-free recycled thermoplastics. In addition, the present invention relates to a stabilizer composition, a master batch or concentrate, a stabilized plastic composition, a process for stabilizing halogen-free recycled thermoplastics and to possible uses of the composition.
    Type: Application
    Filed: February 25, 2022
    Publication date: June 6, 2024
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Rudolf PFAENDNER, Matthias POLIDAR, Elke METSCH-ZILLIGEN
  • Publication number: 20240182683
    Abstract: The present invention relates to a new stabilizer composition on the basis of an aziridine and at least a hydrotalcite, zeolite, dawsonite or mixtures thereof. The stabilizer composition is suitable for stabilizing condensation polymers, in particular aliphatic polyesters against hydrolytic degradation. The invention also relates to the use of the stabilizer composition according to the invention and to a method for stabilizing condensation polymers against hydrolytic degradation. The present invention further relates to molded parts and moldings that can be produced from the composition according to the invention.
    Type: Application
    Filed: March 17, 2022
    Publication date: June 6, 2024
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Jannik HALLSTEIN, Elke METZSCH-ZILLIGEN, Rudolf PFAENDNER
  • Publication number: 20240174840
    Abstract: The present invention relates to the combined use of sulfite and/or at least one thiosulfate and a polymeric or oligomeric hindered amine for stabilizing organic materials, in particular against oxidative thermal and/or actinic degradation. The present invention further relates to correspondingly produced compositions, to moldings producible from these compositions, to a method for stabilizing organic materials and to possible uses of the stabilized organic materials.
    Type: Application
    Filed: March 1, 2022
    Publication date: May 30, 2024
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Rudolf PFAENDNER, Matthias POLIDAR, Elke METSCH-ZILLIGEN
  • Publication number: 20240043745
    Abstract: The present invention relates to the use of specific eugenol derivatives as stabilizers of organic materials against oxidative, thermal and/or actinic degradation. The present invention also relates to stabilized organic material and to specific eugenol derivatives which are suitable as stabilizers.
    Type: Application
    Filed: November 2, 2021
    Publication date: February 8, 2024
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Jannik MAYER, Elke METZSCH-ZILLIGEN, Rudolf PFAENDNER
  • Publication number: 20240026124
    Abstract: Disclosed is a method of stabilizing organic materials and plastics, wherein the method involves incorporating into the organic material or plastic a stabilizing compound selected from the group consisting of dieugenol, eugenol oligomers, eugenol cooligomers, eugenol polymers, and eugenol copolymers. A secondary antioxidant can be included further. Also disclosed are stabilized organic materials and plastics.
    Type: Application
    Filed: September 15, 2021
    Publication date: January 25, 2024
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventor: Rudolf PFAENDNER
  • Patent number: 11760865
    Abstract: The present invention relates to the use of halogen-free sulphonic acid esters and/or sulphinic acid esters as flame retardant and/or flame retardant synergists in plastics. The invention furthermore relates to the use of said compounds as radical generators in plastics, particularly in order to increase the molecular weight of the plastics, to branch and/or cross-link the plastics, to reduce the molecular weight of the plastics, to influence the molecular weight distribution of the plastics and to graft unsaturated monomers to the plastics. The present invention furthermore relates to the use of flame-retardant plastic compositions in the electrical or electronics industry, construction industry, transport industry, preferably automobiles, aircraft, trains and ships, for medical applications, for household appliances, vehicle parts, consumer products, packaging, furniture and textiles.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: September 19, 2023
    Assignee: Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V.
    Inventors: Rudolf Pfaendner, Thomas Driever, Anina Leipold, Elke Metzsch-Zilligen
  • Publication number: 20230203274
    Abstract: The invention relates to an additive composition comprising at least one hydroxycarboxylic acid salt and at least one organic phosphorus compound, said composition being capable of accelerating the hydrolytic decomposition of a thermoplastic condensation polymer upon working said additive composition into the condensation polymer. The invention additionally relates to a condensation polymer composition which is additivized with an additive composition according to the invention. The invention additionally relates to a method for the hydrolytic decomposition of a thermoplastic condensation polymer and to uses of the additive composition according to the invention and the thermoplastic condensation polymer composition.
    Type: Application
    Filed: April 16, 2021
    Publication date: June 29, 2023
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Matthias POLIDAR, Elke METZSCH-ZILLIGEN, Rudolf PFAENDNER
  • Publication number: 20230174746
    Abstract: The invention relates to an additive composition with inorganic sulfites, organic derivatives of sulfurous acid and/or thiosulfates, and organic phosphorus compounds, said composition being capable of accelerating the hydrolytic decomposition of a thermoplastic condensation polymer upon working said additive composition into the condensation polymer. The invention additionally relates to a condensation polymer composition which is additivized with an additive composition according to the invention. The invention additionally relates to a method for the hydrolytic decomposition of a thermoplastic condensation polymer and to uses of the additive composition according to the invention and the thermoplastic condensation polymer composition.
    Type: Application
    Filed: March 24, 2021
    Publication date: June 8, 2023
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Matthias POLIDAR, Elke METZSCH-ZILLIGEN, Rudolf PFAENDNER
  • Patent number: 11634560
    Abstract: The present invention relates to the use of efficient phosphorous substances, in particular based on diphenylamine and heterocyclic diphenylamine derivatives as stabilizers for organic materials, in particular for plastic materials, against oxidative, thermal and/or actinic degradation. The present invention additionally relates to an organic material that has been correspondingly stabilized as described above. The invention further relates to a method of stabilizing organic materials and to specific stabilizers.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: April 25, 2023
    Assignee: Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V.
    Inventors: Michael Ciesielski, Max Briesenick, Rudolf Pfaendner
  • Publication number: 20230119120
    Abstract: The invention relates to the use of specific hydroycinnamic acid salts for stabilizing organic materials. The invention also relates to a corresponding organic material stabilized by incorporating a specific hydroxycinnamic acid salt, and to a method for stabilizing organic materials. In addition, a specific aluminum salt of a hydroxycinnamic acid suitable as an organic stabilizer is described. The invention further relates to a stabilizer composition comprising a corresponding hydroxycinnamic acid salt.
    Type: Application
    Filed: March 25, 2021
    Publication date: April 20, 2023
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Rudolf PFAENDNER, Jannik MAYER, Elke METZSCH-ZILLIGEN
  • Publication number: 20230117792
    Abstract: The present invention relates to the use of specific cinnamic acid esters as stabilizers of organic materials, in particular against oxidative, thermal and/or actinic degradation. The invention also relates to a corresponding stabilized organic material. The invention further relates to a method for stabilizing organic materials, in which specific cinnamic acid esters are incorporated into the organic material. According to the invention, specific new cinnamic acid esters are also disclosed.
    Type: Application
    Filed: March 19, 2021
    Publication date: April 20, 2023
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Rudolf PFAENDNER, Jannik MAYER, Elke METZSCH-ZILLIGEN
  • Patent number: 11591450
    Abstract: The invention relates to a method for stabilizing halogen-free thermoplastic recyclates or pre-damaged plastics against oxidative, thermal, and/or actinic degradation. In the method according to the invention, at least one alditol or cyclitol is introduced into a halogen-free thermoplastic recyclate as a component, and optionally in addition thereto, at least one primary antioxidant and/or at least one secondary antioxidant is introduced into a halogen-free thermoplastic recyclate. By virtue of the method according to the invention, plastic recyclates can be stabilized against oxidative, thermal, and/or actinic degradation with a high degree of effectiveness and in a very environmentally friendly and inexpensive manner.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: February 28, 2023
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Rudolf Pfaendner, Elke Metzsch-Zilligen
  • Publication number: 20220340717
    Abstract: The present invention relates to an oligomer or polymer, or to a composition comprising said oligomer or polymer, which are particularly useful as a stabiliser for organic materials. The present invention also relates to an intermediate for the synthesis of the above-mentioned oligomers or polymers.
    Type: Application
    Filed: July 17, 2020
    Publication date: October 27, 2022
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Markus OLSCHEWSKI, Elke METZSCH-ZILLIGEN, Rudolf PFAENDNER
  • Publication number: 20220267568
    Abstract: The present invention relates to the use of at least one phenolically substituted sugar derivative as a stabiliser of organic materials, in particular plastics, against oxidative, thermal and/or actinic degradation. The present invention also relates to a corresponding plastic composition, to a method for stabilising plastics, to a moulding compound or a moulded part as well as a phenolically substituted sugar derivative.
    Type: Application
    Filed: July 7, 2020
    Publication date: August 25, 2022
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E. V.
    Inventor: Rudolf PFAENDNER
  • Patent number: 11407720
    Abstract: The invention relates to compounds of a new type which have a stabilizing effect and in particular provide stabilization with respect to oxidative thermal and/or actinic decomposition of or damage to organic materials. The compounds are represented by general formula I specified below. The invention further relates to a method for producing such compounds, to compositions containing said compound, to a method for stabilizing organic compounds by means of the stabilizing compounds, and to the use of the stabilizing compounds to stabilize organic materials.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: August 9, 2022
    Assignee: Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V.
    Inventors: Johannes Fischer, Elke Metzsch-Zillingen, Rudolf Pfaendner
  • Patent number: 11358941
    Abstract: The invention relates to compounds of a new type which have a stabilizing effect and in particular provide stabilization with respect to oxidative thermal and/or actinic decomposition of or damage to organic materials. The compounds are represented by general formula I specified below. The invention further relates to a method for producing such compounds, to compositions containing said compound, to a method for stabilizing organic compounds by means of the stabilizing compounds, and to the use of the stabilizing compounds to stabilize organic materials.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: June 14, 2022
    Assignee: Fraunhofer-Gesellschaftzurförderung der angewandten Forschung e.V.
    Inventors: Johannes Fischer, Elke Metzsch-Zillingen, Rudolf Pfaendner
  • Publication number: 20220162422
    Abstract: The invention relates to a method for stabilizing thermoplastic recyclates or previously damaged plastic materials against oxidative, thermal and/or actinic degradation. According to the claimed method, at least one substituted sugar, selected from the group consisting of at least one ester and/or ether of an alditol or cyclitol, at least one ester of a saccharic acid, at least one amide and/or substituted amine of an amine sugar, and mixtures and combinations thereof, as the stabilizing component is introduced in a thermoplastic recyclate and optionally additionally at least one primary antioxidant and/or at least one secondary antioxidant is introduced in a thermoplastic recyclate.
    Type: Application
    Filed: March 24, 2020
    Publication date: May 26, 2022
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E. V.
    Inventor: Rudolf PFAENDNER
  • Publication number: 20220119624
    Abstract: The invention relates to a method of stabilizing halogen-free thermoplastic recyclates against oxidative, thermal and/or actinic degradation. The invention also relates to a correspondingly stabilized plastics composition, a stabilizer composition for stabilizing halogen-free thermoplastic recyclates and uses thereof.
    Type: Application
    Filed: January 24, 2020
    Publication date: April 21, 2022
    Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E. V.
    Inventors: Rudolf PFAENDNER, Elke METZSCH-ZILLINGEN
  • Patent number: 11292859
    Abstract: The invention relates to a method for producing a polymer by means of nitroxyl-controlled polymerisation. According to the invention, a mixture is initiated which contains at least one radically polymerisable monomer and additionally contains at least one initiator, at least one reactive agent that converts at least one portion of the alkoxyamine end groups produced during the radical polymerisation into a non-polymerisable group, and at least one additive that accelerates the hydroxyl-controlled polymerisation and/or the conversion of the alkoxyamine end groups into a non-polymerisable group.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: April 5, 2022
    Assignee: Fraunhofer-Gesellschaft zurförderung der angewandten Forschung e.V.
    Inventors: Roland Klein, Markus Mazurowski, Konrad Burlon, Matthias Wittemann, Rudolf Pfaendner