Patents by Inventor Christian Kreft

Christian Kreft 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: 20190375909
    Abstract: Process for producing a pressure-sensitive adhesive comprising expanded microballoons, wherein the constituents for forming the adhesive are mixed in a first mixing assembly, the mixed adhesive is transferred into a second mixing assembly into which, at the same time, unexpanded microballoons are fed, the microballoons are expanded in the second mixing assembly or on exit from the second mixing assembly, the adhesive mixture with the expanded microballoons is shaped to a layer in a shaping assembly in which expanded microballoons which have broken through the surface are pressed into the layer surface and the layer of adhesive mixture together with the expanded microballoons are optionally applied to a weblike backing material.
    Type: Application
    Filed: July 31, 2019
    Publication date: December 12, 2019
    Applicant: tesa SE
    Inventors: Franziska CZERWONATIS, Axel BURMEISTER, Sabine BHANDARI, Christian KREFT, Stephan BÜNZ
  • Patent number: 9499726
    Abstract: A pressure-sensitive adhesive consisting of a homogeneous mixture of at least one natural rubber component and at least one polyacrylate component displays significantly improved properties in cohesion and aging and weathering resistance compared to the individual components. Particularly good properties are achieved when the adhesive contains x % by weight of at least one natural rubber component, y % by weight of at least one polyacrylate component, v % by weight of at least one adhesive resin component and w % by weight of additives, where 10?×x?80, 10?y<95, 0?v?50, 0?w?10 and x+y+v+w=100. A single- or double-sided adhesive tape consisting of at least one support and at least one layer of such a pressure-sensitive adhesive therefore likewise has good cohesion and aging resistance properties.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: November 22, 2016
    Assignee: tesa SE
    Inventors: Franziska Zmarsly, Sabine Thormeier, Christian Kreft, Axel Burmeister, Stephan Bünz
  • Publication number: 20160083549
    Abstract: Process for producing a pressure-sensitive adhesive comprising expanded microballoons, wherein the constituients for forming the adhesive are mixed in a first mixing assembly, the mixed adhesive is transferred into a second mixing assembly into which, at the same time, unexpanded microballoons are fed, the microballoons are expanded in the second mixing assembly or on exit from the second mixing assembly, the adhesive mixture with the expanded microballoons is shaped to a layer in a shaping assembly in which expanded microballoons which have broken through the surface are pressed into the layer surface and the layer of adhesive mixture together with the expanded microballoons are optionally applied to a weblike backing material.
    Type: Application
    Filed: November 30, 2015
    Publication date: March 24, 2016
    Applicant: tesa SE
    Inventors: FRANZISKA ZMARSLY, AXEL BURMEISTER, SABINE THORMEIER, CHRISTIAN KREFT, STEPHAN BÜNZ
  • Publication number: 20120220686
    Abstract: Pressure-sensitive adhesive comprising at least one polyisobutylene, at least one (meth)acrylate polymer or copolymer, and optionally additives, the proportion of polyisobutylene being at least 10% by weight of the pressure-sensitive adhesive.
    Type: Application
    Filed: August 5, 2009
    Publication date: August 30, 2012
    Applicant: tesa SE
    Inventors: Sabine Thormeier, Franziska Czerwonatis, Christian Kreft, Axel Burmeister, Stephan Buenz
  • Publication number: 20110256395
    Abstract: A pressure-sensitive adhesive consisting of a homogeneous mixture of at least one natural rubber component and at least one polyacrylate component displays significantly improved properties in cohesion and aging and weathering resistance compared to the individual components. Particularly good properties are achieved when the adhesive contains x% by weight of at least one natural rubber component, y% by weight of at least one polyacrylate component, v% by weight of at least one adhesive resin component and w% by weight of additives, where 10?×x?80, 10?y<95, 0?v?50, 0?w?10 and x+y+v+w=100. A single- or double-sided adhesive tape consisting of at least one support and at least one layer of such a pressure-sensitive adhesive therefore likewise has good cohesion and aging resistance properties.
    Type: Application
    Filed: December 7, 2009
    Publication date: October 20, 2011
    Applicant: TESA SE
    Inventors: Franziska Zmarsly, Sabine Thormeier, Christian Kreft, Axel Burmeister, Stephan Bunz
  • Publication number: 20110100551
    Abstract: Adhesive assembly tape for interior finishing, comprising a carrier and an adhesive coated from the melt to at least one side of said carrier, characterized in that the adhesive comprises an ethylene-propylene rubber having a density of between 0.86 and 0.89 g/cm3 and a tackifier resin.
    Type: Application
    Filed: October 14, 2010
    Publication date: May 5, 2011
    Applicant: TESA SE
    Inventors: Bernhard Müssig, Kerstin Metzler, Stephan Bünz, Christian Kreft
  • Publication number: 20090221744
    Abstract: A process is presented for the preparation of a high-cohesion non-thermoplastic pressure-sensitive adhesive (PSA) on the basis of elastomers, in which neither a solvent nor thermoplastic additives are used and yet thermal breakdown during compounding is kept low. This is achieved through the addition of a vaporizable process agent which is introduced into the adhesive after the constituents have been premixed and which undergoes flash vaporization therein, thereby quenching the adhesive. Furthermore, the use of water to cool the adhesive is proposed, and the high-cohesion PSA thus produced, and also a pressure-sensitive adhesive tape with an adhesive of this kind, are presented.
    Type: Application
    Filed: April 17, 2008
    Publication date: September 3, 2009
    Applicant: TESA AG
    Inventors: Sabine Thormeier, Franziska Zmarsly, Christian Kreft, Axel Burmeister
  • Publication number: 20090181250
    Abstract: Adhesive, more particularly pressure-sensitive adhesive, which comprises expanded microballoons, the bond strength of the adhesive comprising the expanded microballoons being reduced by not more than 30%, preferably not more than 20%, more preferably 10%, in comparison to the bond strength of an adhesive of identical coatweight and formula which has been defoamed by the destruction of the voids produced by the expanded microballoons.
    Type: Application
    Filed: February 14, 2008
    Publication date: July 16, 2009
    Applicant: TESA AG
    Inventors: Franziska Zmarsly, Axel Burmeister, Sabine Thormeier, Christian Kreft, Stephan Bunz
  • Patent number: 7226967
    Abstract: Hot-melt pressure-sensitive adhesive based one or more non-thermoplastic elastomers, at least comprising 100 parts by mass of the non-thermoplastic elastomer(s), from 1 to 200 parts by mass of one or more tackifying resins, from 1 to 100 parts by mass of one or more reactive phenolic resins whose methylol content is from 1 to 20% by weight, based on the reactive phenolic resin, from 1 to 100 parts by mass of accelerator substances.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: June 5, 2007
    Assignee: tesa AG
    Inventors: Axel Burmeister, Sven Hansen, Heiko Leydecker, Christian Kreft, Jochen Stahr
  • Publication number: 20060029760
    Abstract: A laser film composed of a) an at least one-ply backing layer comprising a transparent sheet b) coated on one side with a self-adhesive mass c) comprising an additive that changes color under laser irradiation, and d) lined if desired with a release paper or a release film.
    Type: Application
    Filed: June 16, 2005
    Publication date: February 9, 2006
    Applicant: tesa Aktiengesellschaft
    Inventors: Christian Kreft, Soren Kahlcke
  • Publication number: 20050004287
    Abstract: Hot-melt pressure-sensitive adhesive based one or more non-thermoplastic elastomers, at least comprising 100 parts by mass of the non-thermoplastic elastomer(s), from 1 to 200 parts by mass of one or more tackifying resins, from 1 to 100 parts by mass of one or more reactive phenolic resins whose methylol content is from 1 to 20% by weight, based on the reactive phenolic resin, from 1 to 100 parts by mass of accelerator substances.
    Type: Application
    Filed: July 29, 2004
    Publication date: January 6, 2005
    Applicant: Bayer AG
    Inventors: Axel Burmeister, Sven Hansen, Heiko Leydecker, Christian Kreft, Jochen Stahr
  • Patent number: 6822048
    Abstract: Hot-melt pressure-sensitive adhesive based one or more non-thermoplastic elastomers, at least comprising 100 parts by mass of the non-thermoplastic elastomer(s), from 1 to 200 parts by mass of one or more tackifying resins, and also one or more polyfunctional isocyanates which are free from blocking agent, the hot-melt pressure-sensitive adhesive comprising from 8 mmol to 5 mol of the reactive isocyanate groups of the isocyanate per kilogram of the non-thermoplastic elastomer(s) used.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: November 23, 2004
    Assignee: tesa Aktiengesellschaft
    Inventors: Axel Burmeister, Sven Hansen, Heiko Leydecker, Christian Kreft, Jochen Stähr
  • Patent number: 6822029
    Abstract: Hot-melt pressure-sensitive adhesive based one or more non-thermoplastic elastomers, at least comprising 100 parts by mass of the non-thermoplastic elastomer(s), from 1 to 200 parts by mass of one or more tackifying resins, from 1 to 100 parts by mass of one or more reactive phenolic resins whose methylol content is from 1 to 20% by weight, based on the reactive phenolic resin, from 1 to 100 parts by mass of accelerator substances.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: November 23, 2004
    Assignee: tesa AG
    Inventors: Axel Burmeister, Sven Hansen, Heiko Leydecker, Christian Kreft, Jochen Stähr
  • Patent number: 6444068
    Abstract: Method for the production of a laser-inscribable sheet of glass, wherein a laser-sensitive coating, comprising a) a base polymer and b) a radiation-sensitive additive which exhibits a color change on laser irradiation, is applied to at least part of a sheet of glass and hardened, and the sheet of glass is subsequently inscribed by means of a laser.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: September 3, 2002
    Assignee: tesa AG
    Inventors: Arne Koops, Ronald Pfaff, Christian Kreft
  • Patent number: 5824397
    Abstract: Use of labels for labelling rubber parts, in particular tires, comprisinga) a base layer comprising a laser-inscribable, co-vulcanizable, pale rubber blend whichb) contains an additive which produces a color change on laser irradiation,c) is, if desired, covered by a protective covering which is transparent in the visible region and in the near IR region, andd) is, if desired, coated on one side with a self-adhesive composition whiche) is, if desired, covered by a release paper or a release film.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: October 20, 1998
    Assignee: Beiersdorf AG
    Inventors: Arne Koops, Klaus Kulper, Ulrich Ofer, Christian Kreft