Patents by Inventor Stephan Zöllner

Stephan Zöllner 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).

  • Patent number: 10316117
    Abstract: End-group-functionalized oligomers with controlled degrees of functionality based on styrene are produced by reacting the monomer with a regulator by means of free-radical polymerization. At least some of the quantity of regulator is added according to a prescribed program so that at every juncture t the value of the quantitative fraction added up to said juncture does not fall short of the value of the respective conversion U(t) in the polymerization reaction at said juncture t by more than 5 percentage points and does not exceed said value U(t) by more than 5 percentage points.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: June 11, 2019
    Assignee: TESA SE
    Inventors: Stephan Zöllner, Alexander Prenzel, Bernd Lühmann, Benjamin Pütz, Helmut Ritter
  • Patent number: 10232586
    Abstract: Composite made of two substrates for use for optical, electronic and/or precision-engineered equipment, comprising a first substrate and a second substrate and, arranged so as to connect the first substrate to the second substrate, an adhesive layer, wherein the adhesive layer comprises an adhesive which has, relative to the mixture, (a) from 60% by weight to 90% by weight of a first polymer component based on polyacrylate and (b) from 10% by weight to 40% by weight of a second polymer component based on elastomers, where the second polymer component is essentially not miscible with the first polymer component, so that the adhesive is present in at least two separate phases in the adhesive layer.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: March 19, 2019
    Assignee: TESA SE
    Inventors: Thilo Dollase, Anika Petersen, Elisabetta Ardente, Franziska Eberhardt, Stephan Zöllner, Kai Ellringmann, Bernd Lühmann
  • Patent number: 9896605
    Abstract: The invention describes a double-sided, carrierless self-adhesive tape which can be used in particular for achieving very durable adhesive bonding of a variety of articles. This double-sided, carrierless self-adhesive tape is composed of a homogeneously crosslinked pressure-sensitive acrylate hotmelt composition of single-layer construction, which may have been lined with release materials such as siliconized release papers or release films. The double-sided, carrierless pressure-sensitive adhesive tape is characterized in that it is composed of a photoinitiator-free, thermally homogeneously crosslinked acrylate hotmelt which is crosslinked predominantly by way of urethane units. It is notable in particular for the fact that it is homogeneously chemically crosslinked through the layer and, in contrast to acrylate layers crosslinked by radiation (UV/EBC), does not exhibit any profile of crosslinking through the layer.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: February 20, 2018
    Assignee: TESA SE
    Inventors: Stephan Zöllner, Sven Hansen, Kay Brandes, Jorg Speer
  • Patent number: 9834636
    Abstract: Crosslinked pressure-sensitive adhesives (PSAs) based on polymers of branched macromolecules each comprising a main chain and one or more sidechains pendent to the main chain, the constitutional units thereof originating from a) X wt % of one or more acrylic and/or methacrylic esters, with 80<=X<=99.5; b) Y wt % of radically copolymerizable monomers having at least one acid function, with 0.5<=Y<=15; c) Z wt % of vinyl compounds, with 0<=Z<=5, at least one sidechain pendent to the main chain having a number-average molar mass >=1000 g/mol, and the respective amounts of constitutional units originating from a), b) and c) can be the same in each case or differ by not more than 1%, and where a), b) and c) may in each case be the same or different monomers, have detachment properties which can be set independently of one another.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: December 5, 2017
    Assignee: TESA SE
    Inventors: Bernd Lühmann, Alexander Prenzel, Benjamin Pütz, Helmut Ritter, Stephan Zöllner
  • Publication number: 20170283656
    Abstract: A method for increasing the adhesion between the first surface of a first web-type material and a first surface of a second web-type material, the first web-type material and the second web-type material being supplied to a lamination nip continuously and with the same direction of the web. In said nip, the first surface of the first web-type material and of the second web-type material are laminated together and both first surfaces are treated with a plasma over the whole surface. The lamination nip is formed by a pressure roller and a counter-pressure roller and at least one of the surfaces of the rollers or both are equipped with a dielectric. The plasma or the corona is produced by a nozzle. The first web-type material comprises an adhesive compound layer arranged in the first web-type material such as to form the first surface of the first web-type material.
    Type: Application
    Filed: September 1, 2015
    Publication date: October 5, 2017
    Applicant: TESA SE
    Inventors: Arne KOOPS, Marco KUPSKY, Klaus KEITE-TELGENBÜSCHER, Stephan ZÖLLNER, Thomas SCHUBERT
  • Publication number: 20170282445
    Abstract: A method for increasing the adhesion between the first surface of a first web-shaped material and a first surface of a second web-shaped material, the first web-shaped material and the second web-shaped material being fed continuously and with the same web direction to a laminating gap, in which the first web-shaped material and the second web-shaped material are laminated together by means of the first surfaces thereof, the two first surfaces being treated with a single plasma simultaneously and preferably over the entire area, the laminating gap being formed by a pressing element and a counter-pressure device, which builds up a counter pressure, and preferably at least one of the lateral surfaces of the pressing element and of the counter-pressure device or both being equipped with a dielectric, characterized in that none of the two first surfaces/web-shaped materials are guided through the discharge zone of the plasma-generating device.
    Type: Application
    Filed: September 7, 2015
    Publication date: October 5, 2017
    Applicant: TESA SE
    Inventors: Arne KOOPS, Marco KUPSKY, Klaus KEITE-TELGENBÜSCHER, Stephan ZÖLLNER, Thomas SCHUBERT
  • Patent number: 9505959
    Abstract: The invention relates to a process for preparing homogeneously crosslinked polymers, in which at least one crosslinker is added to a polymer in the melt, in which the polymer is further processed from the melt, and in which a thermal crosslinking reaction is brought about by means of the crosslinker, with at least part of the crosslinking reaction taking place after the further processing at a temperature below the melting temperature of the polymer, characterized in that the crosslinker comprises an at least difunctional compound, at least one of the functional groups being an oxazoline group, and the polymer contains functional groups which, at a temperature below the melting temperature of the polymer, are able to react with the oxazolines in a linking reaction in the sense of the thermal crosslinking reaction.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: November 29, 2016
    Assignee: tesa SE
    Inventors: Norbert Grittner, Sven Hansen, Alexander Prenzel, Stephan Zöllner
  • Publication number: 20160311956
    Abstract: Crosslinked pressure-sensitive adhesives (PSAs) based on polymers of branched macromolecules each comprising a main chain and one or more sidechains pendent to the main chain, the constitutional units thereof originating from a) X wt % of one or more acrylic and/or methacrylic esters, with 80<=X<=99.5; b) Y wt % of radically copolymerizable monomers having at least one acid function, with 0.5<=Y<=15; c) Z wt % of vinyl compounds, with 0<=Z<=5, at least one sidechain pendent to the main chain having a number-average molar mass >=1000 g/mol, and the respective amounts of constitutional units originating from a), b) and c) can be the same in each case or differ by not more than 1%, and where a), b) and c) may in each case be the same or different monomers, have detachment properties which can be set independently of one another.
    Type: Application
    Filed: November 19, 2014
    Publication date: October 27, 2016
    Applicant: TESA SE
    Inventors: Bernd LÜHMANN, Alexander PRENZEL, Benjamin PÜTZ, Helmut RITTER, Stephan ZÖLLNER
  • Publication number: 20160311955
    Abstract: Acrylate-based oligomers having double-bond end-group-functionalization are produced by means of free-radical polymerization where, in a first step, a monomer mixture of an acrylate component and an aromatic component is reacted with use of a difunctional regulator, the molar quantity of monomer mixture to that of regulator being from 100:20 to 100:0.5 and the polymerization is continued until monomer conversion reaches at least 96%. In a second step, the resultant macromolecules are reacted, in the reactor in which the polymerization was conducted, with at least one compound Z which has a functional group and has an ethylenic doule bond, and at least that portion of the compound Z that contains the ethylenic double bond becomes linked to the macromolecules via reaction of one of the functional groups of the difunctional regulator with the functional group of the compound Z.
    Type: Application
    Filed: November 19, 2014
    Publication date: October 27, 2016
    Applicant: TESA SE
    Inventors: Bernd LÜHMANN, Alexander PRENZEL, Benjamin PÜTZ, Helmut RITTER, Stephan ZÖLLNER
  • Publication number: 20160311942
    Abstract: End-group-functionalized oligomers with controlled degrees of functionality based on styrene are produced by reacting the monomer with a regulator by means of free-radical polymerization. At least some of the quantity of regulator is added according to a prescribed program so that at every juncture t the value of the quantitative fraction added up to said juncture does not fall short of the value of the respective conversion U(t) in the polymerization reaction at said juncture t by more than 5 percentage points and does not exceed said value U(t) by more than 5 percentage points.
    Type: Application
    Filed: November 19, 2014
    Publication date: October 27, 2016
    Applicant: TESA SE
    Inventors: Stephan ZÖLLNER, Alexander PRENZEL, Bernd LÜHMANN, Benjamin PÜTZ, Helmut RITTER
  • Publication number: 20160167339
    Abstract: Composite made of two substrates for use for optical, electronic and/or precision-engineered equipment, comprising a first substrate and a second substrate and, arranged so as to connect the first substrate to the second substrate, an adhesive layer, wherein the adhesive layer comprises an adhesive which has, relative to the mixture, (a) from 60% by weight to 90% by weight of a first polymer component based on polyacrylate and (b) from 10% by weight to 40% by weight of a second polymer component based on elastomers, where the second polymer component is essentially not miscible with the first polymer component, so that the adhesive is present in at least two separate phases in the adhesive layer.
    Type: Application
    Filed: July 8, 2014
    Publication date: June 16, 2016
    Applicant: TESA SE
    Inventors: Thilo DOLLASE, Anika PETERSEN, Elisabetta ARDENTE, Franziska EBERHARDT, Stephan ZÖLLNER, Kai ELLRINGMANN, Bernd LÜHMANN
  • Patent number: 9206279
    Abstract: Laser-inscribable film, comprising a contrast layer based on a cured acrylate coating composition and, arranged above the contrast layer, an engraving layer, where the cured acrylate coating composition is based on a composition comprising from 30 to 80% by weight of a trifunctional oligomer A, from 0 to 20% by weight of a trifunctional monomer B, from 1 to 30% by weight of a difunctional monomer C, and from 2 to 40% by weight of a colorant pigment.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: December 8, 2015
    Assignee: tesa SE
    Inventors: Michael Siebert, Philipp Preuβ, Jan Ellinger, Klaus Keite-Telgenbüscher, Stephan Zöllner
  • Patent number: 9163168
    Abstract: The invention provides meltable and UV-crosslinkable pressure-sensitive adhesives, such as acrylate hotmelts or hotmelt formulations, which can be processed by commonplace hotmelt processes and also on customary hotmelt coating lines, without any immediate alteration in the product properties in the event of (unwanted) deviation in the operational parameters. The compositions of the invention are UV-crosslinkable and meltable pressure-sensitive adhesives comprising (i) mixtures of UV-crosslinkable polyacrylate polymers selected from a) mixtures of UV-crosslinkable polymers with at least one photoinitiator bonded covalently to the backbone of the polymers, and b) mixtures of UV-crosslinkable polyacrylate polymers, monomers and at least one photoinitiator, and also (ii) at least one UV stabilizer, and also methods for producing them and the use thereof as bonding agents.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: October 20, 2015
    Assignee: TESA SE
    Inventors: Alexander Prenzel, Stephan Zöllner, Michael Siebert
  • Publication number: 20150024132
    Abstract: The invention describes a double-sided, carrierless self-adhesive tape which can be used in particular for achieving very durable adhesive bonding of a variety of articles. This double-sided, carrierless self-adhesive tape is composed of a homogeneously crosslinked pressure-sensitive acrylate hotmelt composition of single-layer construction, which may have been lined with release materials such as siliconized release papers or release films. The double-sided, carrierless pressure-sensitive adhesive tape is characterized in that it is composed of a photoinitiator-free, thermally homogeneously crosslinked acrylate hotmelt which is crosslinked predominantly by way of urethane units. It is notable in particular for the fact that it is homogeneously chemically crosslinked through the layer and, in contrast to acrylate layers crosslinked by radiation (UV/EBC), does not exhibit any profile of crosslinking through the layer.
    Type: Application
    Filed: September 23, 2014
    Publication date: January 22, 2015
    Inventors: Stephan ZÖLLNER, Sven HANSEN, Kay BRANDES, Jorg SPEER
  • Publication number: 20140378019
    Abstract: The aim is to reduce the flagging tendency of an adhesive bond using a UV-crosslinkable adhesive. This aim is accomplished by provision of a composition which comprises at least one UV-crosslinkable polyacrylate and at least one terpene-phenolic resin, the total concentration of the terpene-phenolic resins being 1 to 5 wt %, based on the total weight of the composition. The invention additionally relates to a pressure-sensitive adhesive produced on the basis of this composition, an adhesive tape based on said adhesive and the use of said tape for wrapping elongate material such as cable harnesses, for example.
    Type: Application
    Filed: June 18, 2014
    Publication date: December 25, 2014
    Applicant: tesa SE
    Inventors: INGA AUKTUN, MICHAEL SIEBERT, ALEXANDER PRENZEL, STEPHAN ZÖLLNER
  • Patent number: 8802777
    Abstract: Crosslinker/accelerator system for thermally crosslinking polyacrylates with functional groups that are adapted to react with epoxy groups in a crosslinking reaction, comprising at least one epoxy group-containing substance and at least one substance that accelerates the crosslinking reaction at a temperature below the melting temperature of the polyacrylate.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: August 12, 2014
    Assignee: tesa SE
    Inventors: Stephan Zöllner, Kay Brandes, Sven Hansen, Esther Von Possel
  • Publication number: 20140179820
    Abstract: The invention provides meltable and UV-crosslinkable pressure-sensitive adhesives, such as acrylate hotmelts or hotmelt formulations, which can be processed by commonplace hotmelt processes and also on customary hotmelt coating lines, without any immediate alteration in the product properties in the event of (unwanted) deviation in the operational parameters. The compositions of the invention are UV-crosslinkable and meltable pressure-sensitive adhesives comprising (i) mixtures of UV-crosslinkable polyacrylate polymers selected from a) mixtures of UV-crosslinkable polymers with at least one photoinitiator bonded covalently to the backbone of the polymers, and b) mixtures of UV-crosslinkable polyacrylate polymers, monomers and at least one photoinitiator, and also (ii) at least one UV stabilizer, and also methods for producing them and the use thereof as bonding agents.
    Type: Application
    Filed: December 11, 2013
    Publication date: June 26, 2014
    Applicant: tesa SE
    Inventors: Alexander Prenzel, Stephan Zöllner, Michael Siebert
  • Publication number: 20140170326
    Abstract: Crosslinker-accelerator system for the thermal crosslinking of polyacrylates with functional groups suitable for entering into linking reactions with cyclic ethers, more particularly epoxide groups or oxetane groups, comprising at least one substance containing epoxide or oxetane groups (crosslinker) and at least one substance with an accelerating action for the linking reaction at a temperature below the melting temperature of the polyacrylate (accelerator).
    Type: Application
    Filed: December 23, 2013
    Publication date: June 19, 2014
    Applicant: tesa SE
    Inventors: Norbert Grittner, Sven Hansen, Alexander Prenzel, Stephan Zöllner
  • Publication number: 20130040136
    Abstract: Laser-inscribable film, comprising a contrast layer based on a cured acrylate coating composition and, arranged above the contrast layer, an engraving layer, where the cured acrylate coating composition is based on a composition comprising from 30 to 80% by weight of a trifunctional oligomer A, from 0 to 20% by weight of a trifunctional monomer B, from 1 to 30% by weight of a difunctional monomer C, and from 2 to 40% by weight of a colorant pigment.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 14, 2013
    Applicant: TESA SE
    Inventors: Michael Siebert, Philipp Preuß, Jan Ellinger, Klaus Keite-Telgenbüscher, Stephan Zöllner
  • Patent number: 8268442
    Abstract: Adhesive tape suitable for flying splice of flat web material having non-polar surfaces which has been wound to form rolls, the adhesive tape comprising an upper self-adhesive composition (1, 11), a splittable carrier (2, 12) and a lower self-adhesive composition (3, 13) on the bottom face of the splittable carrier (2, 12), wherein as upper self-adhesive composition (1, 11) a silicone-free self-adhesive composition is used which has a bond strength to a polyethylene substrate of 1.5 N/cm or more (measurement method tesa test A) and an initial tack corresponding to a rolling distance of 200 mm or less (measurement method tesa test D), and as lower self-adhesive composition (3, 13) a self-adhesive composition is used which has a bond strength to a polyethylene substrate of 1.5 N/cm or more (measurement method tesa test A) and a complex viscosity of 10,000 Pa·s or more at 1 rad/s and 40° C. (measurement method tesa test F).
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: September 18, 2012
    Assignee: TESA SE
    Inventors: Kai Ellringmann, Stephan Zöllner, Thorsten Krawinkel, Stefan Wulf