Patents by Inventor Ralf KRETZMER

Ralf KRETZMER 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: 20240360346
    Abstract: A pressure-sensitive adhesive for bonding printing plates, comprising one or more copolymers in a combined mass fraction of 30% or more, based on the mass of the pressure-sensitive adhesive, where the one or more copolymers are preparable by polymerizing a monomer composition and optionally subsequently crosslinking the polymers, where the monomer composition, based on the mass of the monomer composition, comprises: i) one or more specific first monomers in a combined mass fraction in the range from 5% to 15%, ii) one or more specific second monomers in a combined mass fraction of 70% or more, and iii) one or more specific third monomers in a combined mass fraction in the range from 5% to 15%.
    Type: Application
    Filed: April 25, 2024
    Publication date: October 31, 2024
    Applicant: tesa SE
    Inventors: Waldemar Schmidt, Eugen Fomenko, Ralf Kretzmer, Kai Ellringmann, Bianca Mayer
  • Publication number: 20240318054
    Abstract: An optically transparent adhesive compound, a process for producing it and an adhesive transfer tape comprising the adhesive compound. The present invention also relates to the use of the adhesive compound. The optically transparent adhesive compound is for bonding displays, holographic optical elements, lenses and glasses, including: 80 to 100% by weight of at least one (meth)acrylate-containing copolymer A, the copolymer A composed of 15 to 95% by weight of linear alkyl (meth)acrylate monomers, wherein the number of carbon atoms of the alkyl radicals of the linear alkyl (meth)acrylate monomers is 6 to 10, and 5 to 30% by weight of hydroxy group-containing (meth)acrylate monomers. Further, the adhesive compound has a haze value of less than 5% and a transmission at 400 nm to 800 nm of more than 90%, each measured according to ASTM D1003-13.
    Type: Application
    Filed: March 22, 2024
    Publication date: September 26, 2024
    Applicant: tesa SE
    Inventors: Julia Rompf, Ralf Kretzmer, Alexander Fischer, Kai Ellringmann, Bastian Wedel
  • Patent number: 12054655
    Abstract: A repulpable pressure-sensitive adhesive useful on polar and apolar papers and storage-stable comprises a polymer whose parent monomer composition comprises: a) 10 to 30 wt % of at least one compound of the formula (I) CH2?CH—C(O)NR1R2??(I), wherein R1 is an unsubstituted alkyl group, a hydroxyalkyl group or an acetonyl radical and R2 is a hydrogen atom, an unsubstituted alkyl group, a hydroxyalkyl group, an acetonyl radical or an aminoalkyl group; b) 60 to 80 wt % of at least one compound of the formula (II) CH2?CH—C(O)O—(CH2)2—O—R3??(II), wherein R3 is an unsubstituted alkyl group, an alkoxyalkyl group or a (polyalkoxy)alkyl group; and c) 0.5 to 10 wt % of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid and (C2-C4 hydroxyalkyl) acrylates. Also disclosed is an adhesive tape comprising the pressure-sensitive adhesive, and use of the pressure-sensitive adhesive and/or the adhesive tape for producing water-soluble bonds.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: August 6, 2024
    Assignee: tesa SE
    Inventors: Benjamin Pütz, Ralf Kretzmer
  • Publication number: 20230183398
    Abstract: A pressure-sensitive adhesive for bonding printing plates comprises one or more poly(meth)acrylates in a combined mass fraction of 50% or more and preparable by polymerization of a monomer composition comprising, based on the mass of the monomer composition: i) one or more first monomers selected from acrylic acid, methacrylic acid, dimethylacrylamide, hydroxybutyl acrylate, hydroxypropyl acrylate and hydroxyethyl acrylate in a combined mass fraction in the range from 10%-20%, and ii) one or more second monomers selected from (meth)acrylic esters of the formula (I), CH2?CR1—C(O)O—CHR2R3 (I), where R1 is hydrogen or methyl, where either i) R2 is hydrogen and R3 is a branched alkyl group having 16-20 carbon atoms, or ii) R2 is a linear or branched alkyl group having 3-10 carbon atoms and R3 a linear or branched alkyl group having 6-10 carbon atoms, in a combined mass fraction in the range from 20%-90%.
    Type: Application
    Filed: December 21, 2022
    Publication date: June 15, 2023
    Applicant: tesa SE
    Inventors: Bianca MAYER, Benjamin PUETZ, Ralf KRETZMER, Alexander ENGEL
  • Publication number: 20210189191
    Abstract: A repulpable pressure-sensitive adhesive useful on polar and apolar papers and storage-stable comprises a polymer whose parent monomer composition comprises: a) 10 to 30 wt % of at least one compound of the formula (I) CH2?CH—C(O)NR1R2??(I), wherein R1 is an unsubstituted alkyl group, a hydroxyalkyl group or an acetonyl radical and R2 is a hydrogen atom, an unsubstituted alkyl group, a hydroxyalkyl group, an acetonyl radical or an aminoalkyl group; b) 60 to 80 wt % of at least one compound of the formula (II) CH2?CH—C(O)O—(CH2)2—O—R3??(II), wherein R3 is an unsubstituted alkyl group, an alkoxyalkyl group or a (polyalkoxy)alkyl group; and c) 0.5 to 10 wt % of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid and (C2-C4 hydroxyalkyl) acrylates. Also disclosed is an adhesive tape comprising the pressure-sensitive adhesive, and use of the pressure-sensitive adhesive and/or the adhesive tape for producing water-soluble bonds.
    Type: Application
    Filed: December 18, 2020
    Publication date: June 24, 2021
    Applicant: tesa SE
    Inventors: Benjamin PÜTZ, Ralf KRETZMER
  • Publication number: 20180230342
    Abstract: The invention relates to pressure-sensitive adhesive material which contains as a base polymer at least one or more solid acrylonitrile butadiene rubbers and adhesive resins, wherein the proportion of adhesive resins is in the range from 30 to 130 phr, characterized in that the acrylonitrile content in the solid acrylonitrile butadiene rubber(s) is between 10 and 30 percent by weight.
    Type: Application
    Filed: August 8, 2016
    Publication date: August 16, 2018
    Inventors: Benjamin PÜTZ, Julia SCHWARZBACH, Maike STREBL, Tobias VON WEDWL-PARLOW, Ralf KRETZMER