Patents by Inventor Markus Parusel

Markus Parusel 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: 20210032502
    Abstract: Brittle acrylic films are made from impact-modified polyalkyl (meth)acrylate and are useful in forgery prevention labels containing the same. The films can be advantageously prepared by extrusion and, depending on the desired purpose, can be designed to be translucent or entirely non-transparent e.g. white. Ideally, the brittle acrylic films and the forgery prevention labels have no intended break points such as slits, perforation etc.
    Type: Application
    Filed: August 22, 2018
    Publication date: February 4, 2021
    Applicant: Röhm GmbH
    Inventors: Ghirmay SEYOUM, Markus Parusel, Detlef Birth, Jürgen Pachmann, Günther Dickhaut, Girolamo Musci, Claude Guénanten, Haroldo Rodrigues
  • Publication number: 20170197391
    Abstract: The present invention relates to novel films for application on materials as protective film in respect of weathering effects. In particular, the present invention relates to a novel film composite which has at least three layers and which features particularly good adhesion on the substrate and particularly good optical properties. The outermost layer here is a layer comprising a fluoropolymer, the middle layer is a PMMA layer comprising at least one UV absorber and/or UV stabilizer, and the innermost layer is a PMMA layer comprising at least one adhesion promoter which improves adhesion on the substrate.
    Type: Application
    Filed: May 19, 2015
    Publication date: July 13, 2017
    Applicant: EVONIK ROEHM GmbH
    Inventors: Markus PARUSEL, Michael ENDERS, Claude GUENANTEN, Michael GOLDER
  • Patent number: 9442237
    Abstract: The present invention relates to a method for producing light guide bodies and to their use in lighting units, for example for liquid crystal displays or for monitors. In particular, the present invention relates to a method for producing light guide bodies which have a thickness of at most 1 mm and contain at least 80 wt % of polymethyl methacrylate and no light-scattering constituents.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: September 13, 2016
    Assignee: Evonik Roehm GmbH
    Inventors: Markus Parusel, Guenther Dickhaut, Thomas Pfaff, Helmut Haering, Michael Enders
  • Publication number: 20130343088
    Abstract: The present invention relates to a method for producing light guide bodies and to their use in lighting units, for example for liquid crystal displays or for monitors. In particular, the present invention relates to a method for producing light guide bodies which have a thickness of at most 1 mm and contain at least 80 wt % of polymethyl methacrylate and no light-scattering constituents.
    Type: Application
    Filed: November 11, 2011
    Publication date: December 26, 2013
    Applicant: Evonik Roehm GmbH
    Inventors: Markus Parusel, Guenther Dickhaut, Thomas Pfaff, Helmut Haering, Michael Enders
  • Publication number: 20130216827
    Abstract: The present invention relates to a laminate comprising at least one thermoplastic substrate and at least one colour layer, wherein the thermoplastic substrate comprises polyamide, to which at least one colour layer comprising polyurethane crosslinking has been applied.
    Type: Application
    Filed: March 13, 2013
    Publication date: August 22, 2013
    Inventors: Markus Parusel, Jonas Scherble, Achim Neuhaeuser, Ralf Richter, Guenther Dickhaut, Herbert Bosch, Hans-Peter Erfurt, Heike Witte
  • Patent number: 7629041
    Abstract: The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 ?m, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 ?m and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: December 8, 2009
    Assignee: Evonik Roehm GmbH
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues
  • Patent number: 7602550
    Abstract: The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: October 13, 2009
    Assignee: Roehm GmbH & Co. KG
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues
  • Publication number: 20080158670
    Abstract: The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.
    Type: Application
    Filed: March 12, 2004
    Publication date: July 3, 2008
    Applicant: ROEHM GBMH & CO., KG
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues
  • Patent number: 7339732
    Abstract: The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 ?m, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 ?m, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: March 4, 2008
    Assignee: Roehm GmbH & Co. KG
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues, Christoph Krohmer, Guenther Dickhaut-Bayer
  • Publication number: 20060240200
    Abstract: The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 ?m, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 ?m and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.
    Type: Application
    Filed: May 12, 2004
    Publication date: October 26, 2006
    Applicant: ROEHM GBMH & CO. KG
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues
  • Publication number: 20060209403
    Abstract: The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 ?m, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 ?m, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.
    Type: Application
    Filed: March 12, 2004
    Publication date: September 21, 2006
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues, Christoph Krohmer, Gunther Dickhaut-Bayer
  • Patent number: 7064894
    Abstract: A rear-projection screen that has at least one light-scattering polymethyl methacrylate layer in which is embedded spherical plastic particles; the previously described rear-project screen that has an additional plastic sheet that does not have embedded scattering beads; and a method of making a rear-projection screen.
    Type: Grant
    Filed: September 27, 2003
    Date of Patent: June 20, 2006
    Assignee: Roehm GmbH & Co. KG
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues, Wolfgang Scharnke, Hans Lorenz, Helmut Haering, Guenther Dickhaut-Bayer
  • Publication number: 20060018015
    Abstract: Abstract of the Disclosure The present invention relates to rear-projection screens encompassing at least one light-scattering polymethyl methacrylate layer of thickness in the range from 0.05 to 4 mm comprising spherical particles whose size is in the range from 5 to 35 µm, at a concentration in the range from 2 to 60% by weight, based on the total weight of the light-scattering polymethyl methacrylate layer, the refractive index of the spherical plastics particles differing from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, wherein the concentration of the spherical plastics particles cP, the thickness of the light-scattering polymethyl methacrylate layer dS, and the size of the spherical plastics particles DP is selected in such a way that the ratio cP*dS/DP3 is in the range from 0.0015 to 0.015% by weight*mm/µm3 and the ratio of average surface roughness of the polymethyl methacrylate layer Ra to the size of the spherical plastics particles Dp is in the range from 0.
    Type: Application
    Filed: May 21, 2004
    Publication date: January 26, 2006
    Applicant: Roehm GmbH @$amp; Co. KG
    Inventors: Markus PARUSEL, Jann SCHMIDT, Herbert GROOTHUES, Wolfgang SCHARNKE, Hans LORENZ, Helmut HAERING, Guenther DICKHAUT-BAYER
  • Publication number: 20050084993
    Abstract: The present invention relates to a [lacuna] having at least one light-entry surface and at least one light-exit surface, the ratio of the light-exit surface area to the light-entry surface area being at least 4, comprising at least one light-guiding layer, characterized in that the light-guiding layer comprises at least 60% by weight, expressed in terms of the weight of the light-guiding layer, of polymethyl methacrylate and from 0.0001 to 0.2% by weight, expressed in terms of the weight of the light-guiding layer, of spherical particles with an average diameter in the range of from 0.3 to 40 ?m, and the light-exit surface of the light-guiding layer is provided with structurings.
    Type: Application
    Filed: May 6, 2003
    Publication date: April 21, 2005
    Applicant: Roehm Gbmh & Co. KG
    Inventors: Jann Schmidt, Markus Parusel, Herbert Groothues, Guenther Ittmann
  • Publication number: 20040257650
    Abstract: The present invention relates to rear-projection screens encompassing at least one light-scattering polymethyl methacrylate layer of thickness in the range from 0.05 to 4 mm comprising spherical particles whose size is in the range from 5 to 35 &mgr;m, at a concentration in the range from 2 to 60% by weight, based on the total weight of the light-scattering polymethyl methacrylate layer, the refractive index of the spherical plastics particles differing from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, wherein the concentration of the spherical plastics particles cp, the thickness of the light-scattering polymethyl methacrylate layer ds, and the size of the spherical plastics particles Dp is selected in such a way that the ratio cp*ds/Dp3 is in the range from 0.0015 to 0.015% by weight*mm/&mgr;m3 and the ratio of average surface roughness of the polymethyl methacrylate layer Ra to the size of the spherical plastics particles Dp is in the range from 0.05 to 0.4.
    Type: Application
    Filed: May 21, 2004
    Publication date: December 23, 2004
    Inventors: Markus Parusel, Jann Schmidt, Herbert Groothues, Wolfgang Scharnke, Hans Lorenz, Helmut Haering, Guenther Dickhaut-Bayer
  • Patent number: 6809163
    Abstract: The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 &mgr;m, which includes: contacting: at least one polymerizable mix which includes at least 50% by weight of at least one (meth)acrylate monomer, at least one aluminum compound, and an aqueous phase, to prepare a mixture; dispersing the mixture at a shear rate≧103 s−1 to form a dispersion, wherein the dispersion is stabilized by the aluminum compound; and polymerizing to produce bead polymers having an average particle size of 1 to 40 &mgr;m.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 26, 2004
    Assignee: Roehm GmbH & Co KG
    Inventors: Klaus Schultes, Thomas Suefke, Markus Parusel, Guenter Schmitt, Winfried Belzner
  • Patent number: 6803416
    Abstract: The present invention provides a moulding composition, which includes: a plurality of bead polymers dispersed in at least one matrix polymer; wherein the bead polymers: have an average particle size of 5 to 40 &mgr;m, and have a refractive index nD at 20° C. which is different from a refractive index nD at 20° C. of said matrix polymer; and wherein the bead polymers are prepared by a process, which includes: contacting: at least one polymerizable mix which includes at least 50% by weight of at least one (meth)acrylate monomer, at least one aluminum compound, and an aqueous phase, to prepare a mixture; dispersing the mixture at a shear rate ≧103 s−1 to form a dispersion, wherein the dispersion is stabilized by the aluminum compound; and polymerizing to produce the bead polymers having an average particle size of 5 to 40 &mgr;m.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: October 12, 2004
    Assignee: Roehm GmbH & Co. KG
    Inventors: Klaus Schultes, Thomas Suefke, Markus Parusel, Werner Hoess
  • Publication number: 20020123565
    Abstract: The present invention provides a moulding composition, which includes:
    Type: Application
    Filed: December 28, 2001
    Publication date: September 5, 2002
    Applicant: ROEHM GMBH & CO. KG
    Inventors: Klaus Schultes, Thomas Suefke, Markus Parusel, Werner Hoess
  • Publication number: 20020123563
    Abstract: The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 &mgr;m, which includes:
    Type: Application
    Filed: December 28, 2001
    Publication date: September 5, 2002
    Applicant: ROEHM GMBH & CO. KG
    Inventors: Klaus Schultes, Thomas Suefke, Markus Parusel, Guenter Schmitt, Winfried Belzner
  • Patent number: 5792514
    Abstract: The invention concerns a method for the production of surface coatings from monodisperse poly(meth)acrylate particles, produced by precipitation polymerization in a halogen-free solvent L in the presence of a block copolymer BCP, wherein the poly(meth)acrylate particles are synthesized from at least 60 wt % monomer units M of formula I: ##STR1## wherein R is hydrogen or methyl, and R.sub.1 is an alkyl radical of 1 to 8 carbon atoms, a substituted aryl radical, or an aralkyl radical, wherein the resulting poly(meth)acrylate has a Vicat softening temperature VET according to ISO 306 between 30.degree. and 110.degree. C., and wherein the specific viscosity of the poly(meth)acrylate in chloroform at 25.degree. C., according to DIN 51562, lies between 10 and 150 cm.sup.3 /g.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: August 11, 1998
    Assignee: Roehm GmbH Chemische Fabrik
    Inventors: Heinz Dieter, Markus Parusel, Werner Siol