Patents Represented by Attorney Jennifer R. Seng
  • Patent number: 8314188
    Abstract: Proposed is a process for the continuous hydrogenation of carbon-carbon double bonds in an unsaturated polymer to produce a hydrogenated polymer, said unsaturated polymer being based on a conjugated diolefin and at least one other copolymerizable monomer, in the presence of a homogeneous or heterogeneous catalyst, wherein said unsaturated polymer, hydrogen and said homogeneous or heterogeneous catalyst is passed through a multistage agitated reactor, comprising a cylindrical, elongated shell having closed ends and separated by baffles into a multiplicity of discrete chambers with access from one chamber to another through concentric circular openings, axially centered with said baffles and a continuous rotatable shaft extending concentric with said baffles within said shell with at least one impeller attached thereto positioned in each chamber, said continuous rotatable shaft and said circular openings providing annular openings and said hydrogenated polymer being withdrawn at the opposite end of the multista
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: November 20, 2012
    Assignee: LANXESS Deutschland GmbH
    Inventors: Garry Rempel, Qinmin Pan, Lifeng Zhang
  • Patent number: 8211979
    Abstract: A multicomponent system is provided, composed of a thermoplastic component and of a rubber component, which comprises at least two different peroxidic crosslinking agents with specific decomposition temperatures, as also is a process for production of rubber-thermoplastic composite mouldings using the multicomponent system, and also the resultant rubber-thermoplastic composite mouldings.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: July 3, 2012
    Assignee: LANXESS Deutschland GmbH
    Inventors: Dirk Achten, Stefanie Nickel, Maik Schulte, Michael Münker, Detlev Joachimi
  • Patent number: 8084548
    Abstract: The present invention relates to a process for the hydrogenation of the carbon-carbon double bonds in diene-based polymers in bulk form by treatment of said diene-based polymer with hydrogen in the presence of an iridium containing catalyst and in the absence of any organic solvent.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: December 27, 2011
    Assignee: LANXESS Inc.
    Inventors: Qinmin Pan, Garry Rempel, Jialong Wu
  • Patent number: 8063136
    Abstract: The novel process provides latices of homo- and copolymers of chloroprene and of one or more further copolymerizable monomers at a higher reaction rate and hence in an improved space-time yield. The latices obtained have a high gel content, distinctly lower levels of by-products, in particular of chloroprene dimer, than prior art products, and are useful, if appropriate in concentrated form, for a wide variety of applications.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: November 22, 2011
    Assignee: LANXESS Deutschland GmbH
    Inventors: Lothar Reif, Christian Lente
  • Patent number: 8013070
    Abstract: Novel crosslinkable compositions are provided and are based on thermoplastic polymers and elastomers, these compositions comprising, as crosslinking system, specific organic salts of metal ions. Ionically crosslinked thermoplastic elastomers can be obtained therefrom and have excellent physical properties, high-temperature resistance extending above 150° C., and also oil resistance. They can be used for production of moldings.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: September 6, 2011
    Assignee: LANXESS Deutschland GmbH
    Inventors: Dirk Achten, Claus Wrana, Kay Varnhorn, Stephen Pask, Carsten Fischer
  • Patent number: 7951875
    Abstract: The present invention relates to hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: May 31, 2011
    Assignee: LANXESS Inc.
    Inventors: Frederic Guerin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
  • Patent number: 7919563
    Abstract: The present invention relates to the process for preparing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: April 5, 2011
    Assignee: Lanxess Inc.
    Inventors: Frederic Guerin, Sharon X. Guo, Zsolt Szentivanyi, Stephan Glander
  • Patent number: 7917308
    Abstract: The invention relates to a process for determining a molecular weight distribution in a polymer. When a polymer is prepared, chains of different length are formed. Correspondingly, a distribution of the molecular weights of the chains of a polymer arises. It is an object of the invention to be able to determine the molecular weight distribution in an improved manner compared to the prior art. The object of the invention is achieved by describing starting data G*(?) available in numerical form, i.e. the complex shear modulus measured as a function of frequency or the mastercurve constructed therefrom, are described by an analytical function. In this way, exact knowledge of the relaxation behaviour is available in improved form, in particular also in the case of prolonged relaxation times. This enables a valid determination of the relaxation time spectrum and hence a fundamentally more valid calculation of the molecular weight distribution.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: March 29, 2011
    Assignee: LANXESS Deutschland GmbH
    Inventors: Claus Wrana, Jochen Kroll
  • Patent number: 7897695
    Abstract: The present invention relates to a process for the selective hydrogenation of the carbon-carbon double bonds in diene-based polymers in bulk form by treatment of the polymer with hydrogen in the presence of a platinum group metal containing catalyst and in the absence of any organic solvent.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: March 1, 2011
    Assignee: LANXESS Inc.
    Inventors: Qinmin Pan, Garry Rempel, Jialong Wu
  • Patent number: 7875683
    Abstract: The metathetic degradation of nitrile rubber can be improved by use of a combination of metal-carbene complex catalysts with specific transition metal additives.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: January 25, 2011
    Assignee: LANXESS Deutschland GmbH
    Inventors: Werner Obrecht, Julia Maria Müller, Oskar Nuyken
  • Patent number: 7846996
    Abstract: New polymer concentrates on the basis of polymer additives, like e.g. fillers and flame-retardants, are provided which have in particular an increased bulk density compared to the polymer additives as such. This increased bulk density leads to a substantial improvement in the processability of such concentrates, their dispersibility during compounding and the properties of the resulting polymer compound. Processing improvements include less dust, faster processing and more homogeneous additive dispersion. The invention also provides a process for preparing such new polymer concentrates, a process for preparing polymer compounds containing the new polymer concentrates, the respective polymer compounds and a process for preparing formed parts thereof. Such formed parts have more uniform properties such as density, wall thickness, and in case of the flame-retardants more homogeneous and consistent flame retardancy.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: December 7, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Stephen Pask, Andre Damman, Stephan Schroeder
  • Patent number: 7846995
    Abstract: Novel optionally hydrogenated nitrile rubbers distinguised by a very low ruthenium content are provided as well as a process for the removal of ruthenium-containing catalyst residues from a solution of optionally hydrogenated nitrile rubber by using specific functionalized ion-exchange resins.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: December 7, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Christopher Ong, Franz-Josef Mersmann
  • Patent number: 7825193
    Abstract: The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: November 2, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Dirk Achten, Michael Klimpel, Emilie Barriau, Lothar Reif, Renke Mottweiler, Heinrich Berg, Zsolt Szentivanyi, Ste{acute over (f)}an Glander
  • Patent number: 7803883
    Abstract: The present invention relates to a process for the selective hydrogenation of the carbon-carbon double bonds in a diene-based polymer latex using a water-soluble catalyst and simultaneously a water-insoluble co-catalyst.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: September 28, 2010
    Assignee: LANXESS Inc.
    Inventors: Qinmin Pan, Garry Rempel, Zhenli Wei
  • Patent number: 7803882
    Abstract: The present invention relates to sulphur-crosslinked hydrogenated vinylpolybutadienes which serve for production of technical rubber items and of tyre components and have very good recovery performance over a wide temperature range.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: September 28, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Andreas Bischoff, Werner Obrecht
  • Patent number: 7799872
    Abstract: The present invention relates to a process for the hydrogenation of the carbon-carbon double bonds in a diene-based polymer latex in the absence of any organic solvent by a catalytically active system prepared in-situ based on a first main catalyst component and a secondary water-insoluble catalyst component.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: September 21, 2010
    Assignee: LANXESS Inc.
    Inventors: Qinmin Pan, Garry Rempel, Zhenli Wei
  • Patent number: 7772328
    Abstract: The present invention relates to hydrogenated nitrite rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention is also related to shaped articles containing hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: August 10, 2010
    Assignee: LANXESS Inc.
    Inventors: Frédéric Guérin, Sharon X. Guo, Zsolt Szentivanyl, Stephan Glander
  • Patent number: 7763703
    Abstract: A novel process is used to prepare synthetic rubbers (B) which feature very narrow molecular weight distribution and a correspondingly low value for the polydispersity index. The preparation process encompasses the treatment of a synthetic rubber with ultrasound, where the resultant synthetic rubber (B) has a lower weight-average molecular weight (Mw) than the synthetic rubber (A) used. The resultant synthetic rubbers (B) have excellent suitability for processing via extruder processes or injection-moulding processes.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: July 27, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Lothar Reif, Stephen Pask
  • Patent number: 7745539
    Abstract: The present invention relates to nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art. The present invention also relates to a process for the manufacture of said nitrile rubber and the use of said nitrile rubber for the manufacture of shaped articles.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: June 29, 2010
    Assignee: LANXESS Inc.
    Inventors: Frédéric Guérin, Sharon X. Guo
  • Patent number: 7741392
    Abstract: The present invention relates to an elastomer rubber composition containing a carboxylated rubber polymer and a fluorinated additive. The present invention is also directed to an elastomer composition containing a hydrogenated carboxylated nitrile rubber and a fluorinated additive.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: June 22, 2010
    Assignee: LANXESS Inc.
    Inventors: Victor Nasreddine, Lorenzo Ferrari, Sharon Guo