Patents by Inventor Claude LERF

Claude LERF 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: 20260062596
    Abstract: A composition useful as a wood joint material includes at least 20 wt. % of a silane-terminated polymer, the polymer backbone of which is selected from a polycarbonate, a polyester, a copolymer containing a polyester and/or a polycarbonate, and a polymer containing at least one ester group and/or carbonate group. This polymer backbone contains a plurality of diol monomer, at least 60% of which have the formula HO—Z—OH, where Z is a saturated or unsaturated hydrocarbon chain optionally containing one or more heteroatoms selected from oxygen, sulphur and a tertiary nitrogen, wherein Z includes at least one side chain and/or at least one cyclic ring system and/or at least one double bond, and the composition is free from hardening catalysts or residues thereof selected from base catalysts having a pKa value greater than 15, and from by-products formed when a leaving group is split off during silane termination of the polymer.
    Type: Application
    Filed: July 19, 2023
    Publication date: March 5, 2026
    Applicant: MERZ + Benteli AG
    Inventors: Stefan HUBER, Thomas ZUBER, Claude LERF, Fritz BURKHARDT
  • Publication number: 20260028450
    Abstract: A surface sealant or jointing material composition contains at least 20 wt. % of a silane-terminated polymer, the polymer backbone of which is selected from a polycarbonate, a polyester, a copolymer containing a polyester and/or a polycarbonate and a polymer containing at least one ester group and/or carbonate group. This backbone contains a plurality of diol monomer at least 60% of which contain a diol of formula HO—Z—OH, wherein Z is a saturated or unsaturated hydrocarbon chain optionally containing one or more heteroatoms selected from oxygen, sulfur and a tertiary nitrogen, Z includes at least one side chain and/or at least one cyclic ring system and/or at least one double bond and the composition is free from hardening catalysts or residues thereof selected from base catalysts having a pKa value greater than 15 and from by-products that may arise by cleaving of a leaving group with silane termination of the polymer.
    Type: Application
    Filed: July 19, 2023
    Publication date: January 29, 2026
    Applicant: MERZ + BENTELI AG
    Inventors: Stefan HUBER, Thomas ZUBER, Claude LERF, Fritz BURKHARDT
  • Publication number: 20260008882
    Abstract: A process for producing a silane-terminated polymer in the presence of a catalyst mixture, wherein the catalyst mixture contains a bismuth and a cobalt catalyst, and the content of the cobalt catalyst is at least 2 ppm relative to the hydroxy-terminated organic polymer of the formula.
    Type: Application
    Filed: July 10, 2023
    Publication date: January 8, 2026
    Applicant: MERZ + BENTELI AG
    Inventors: Stefan HUBER, Fritz BURKHARDT, Claude LERF, Thomas ZUBER
  • Patent number: 12018122
    Abstract: A method for producing an alkoxysilane polymer via a carbamate, thiocarbonate or carbonate-terminated prepolymer (IIIa) or (IIIb) includes reaction of a polymer backbone of formula (I) terminated with at least two amino, mercapto or hydroxyl groups and with a chloroformate of formula (IIa) or a pyrocarbonate of formula (Ilb) (I) (IIa) (IIb) (IIIa) (IIIb), wherein R1 and R3 represent a linear or branched, saturated or unsaturated alkyl or alkenyl group with 1 to 10 carbon atoms or a mono- or polycyclic aliphatic or aromatic ring system with 5 to 18 carbon atoms in the ring system, which is optionally substituted by one or more groups R2, X is oxygen or sulphur, n is 0 for a linear or branched, saturated or unsaturated alkyl or alkenyl group and is 0.1 or 2 for a mono- or polycyclic aliphatic or aromatic ring system, and A represents a polymer backbone.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: June 25, 2024
    Assignee: MERZ+BENTELI AG
    Inventors: Stefan Huber, Thomas Zuber, Fritz Burkhardt, Claude Lerf
  • Publication number: 20240183031
    Abstract: A method for producing coated particles by atomic layer deposition, including the steps of: a) dispersing particles having reactive groups on their surface in an organic solvent, b) adding a first reactant in excess to the reactive groups on the surface, c) mixing the dispersion to react the first reactant with reactive groups on the surface of the particles, d) removing the excess of the first reactant by vacuum or by distillation or by azeotropic distillation, e) adding a second reactant in excess to the reactive groups on the surface obtained in step d), f) mixing the dispersion to react the second reactant with the first reactant on the surface of the particles, g) removing the excess of the second reactant by vacuum or by distillation or by azeotropic distillation.
    Type: Application
    Filed: March 17, 2022
    Publication date: June 6, 2024
    Applicant: MERZ + BENTELI AG
    Inventors: Stefan HUBER, Fritz BURKHARDT, Claude LERF
  • Publication number: 20240110006
    Abstract: A process for preparing a storage-stable silane-terminated polymer of formula (I) or (II) where D is linear or branched hydrocarbon group, A is polymer backbone selected from group, R1, R1?, R2 and R2? are each linear, branched or cyclic hydrocarbon radical having 1 to 10 carbon atoms, n is 1, 2 or 3, x and y are natural numbers between 1 and 10, G is linear or branched hydrocarbon group having 1 to 20 hydrocarbon atoms, F is linear, branched or cyclic organic radical containing no isocyanate-reactive groups, m is natural number greater than 1, E is reactive group reacting with isocyanate group and selected from group consisting of NH2, NHR4 and SH, and R4 is linear, branched or cyclic hydrocarbon radical having 1 to 10 carbon atoms.
    Type: Application
    Filed: January 28, 2022
    Publication date: April 4, 2024
    Applicant: MERZ+BENTELI AG
    Inventors: Stefan HUBER, Thomas ZUBER, Fritz BURKHARDT, Claude LERF
  • Patent number: 11401379
    Abstract: The use of an organocarbonate-modified prepolymer having at least an average of 1.5 carbonate, thiocarbonate, carbamate or thiocarbamate groups bonded directly to the polymer backbone each via an oxygen atom, where each of these oxygen atoms has its origin in the reaction of a primary, secondary or tertiary hydroxyl group of the polymer backbone and a reactive compound selected from the group consisting of a diorganocarbonate, a diorganothiocarbonate, a cyclic carbonate, a cyclic thiocarbonate, an N,N-diheterocyclourea derivative and an N,N-diheterocyclothiourea derivative. Also, the preparation of the alkoxysilane polymers.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: August 2, 2022
    Assignee: MERZ+BENTELI AG
    Inventors: Stefan Huber, Fritz Burkhardt, Claude Lerf
  • Publication number: 20210395450
    Abstract: A method for producing an alkoxysilane polymer via a carbamate, thiocarbonate or carbonate-terminated prepolymer (IIIa) or (IIIb) includes reaction of a polymer backbone of formula (I) terminated with at least two amino, mercapto or hydroxyl groups and with a chloroformate of formula (IIa) or a pyrocarbonate of formula (Ilb) (I) (IIa) (IIb) (IIIa) (IIIb), wherein R1 and R3 represent a linear or branched, saturated or unsaturated alkyl or alkenyl group with 1 to 10 carbon atoms or a mono- or polycyclic aliphatic or aromatic ring system with 5 to 18 carbon atoms in the ring system, which is optionally substituted by one or more groups R2, X is oxygen or sulphur, n is 0 for a linear or branched, saturated or unsaturated alkyl or alkenyl group and is 0.1 or 2 for a mono- or polycyclic aliphatic or aromatic ring system, and A represents a polymer backbone.
    Type: Application
    Filed: November 6, 2019
    Publication date: December 23, 2021
    Applicant: MERZ+BENTELI AG
    Inventors: Stefan HUBER, Thomas ZUBER, Fritz BURKHARDT, Claude LERF
  • Publication number: 20190352461
    Abstract: The use of an organocarbonate-modified prepolymer having at least an average of 1.5 carbonate, thiocarbonate, carbamate or thiocarbamate groups bonded directly to the polymer backbone each via an oxygen atom, where each of these oxygen atoms has its origin in the reaction of a primary, secondary or tertiary hydroxyl group of the polymer backbone and a reactive compound selected from the group consisting of a diorganocarbonate, a diorganothiocarbonate, a cyclic carbonate, a cyclic thiocarbonate, an N,N-diheterocyclourea derivative and an N,N-diheterocyclothiourea derivative. Also, the preparation of the alkoxysilane polymers.
    Type: Application
    Filed: September 4, 2017
    Publication date: November 21, 2019
    Applicant: MERZ+BENTELI AG
    Inventors: Stefan HUBER, Fritz BURKHARDT, Claude LERF