Patents Represented by Attorney, Agent or Law Firm N. Denise Brown
  • Patent number: 8338634
    Abstract: The present invention pertains to a catalyst for the synthesis of organic alkyl carbamates, the method for preparing the same and the use thereof. The catalyst comprises a catalytically active component and a catalyst support, and the catalytically active component being carried by the catalyst support, wherein the catalytically active component comprises a transition metal oxide, and the general formula of the transition metal oxide is EOx, wherein E is selected from transition metal element and x is in the range of 0.5-4.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: December 25, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Youquan Deng, Yubo Ma, Liguo Wang, Xiaoguang Guo, Shiguo Zhang, Yude He, Stefan Wershofen, Stephan Klein, Zhiping Zhou
  • Patent number: 8242229
    Abstract: Polyurethane prepolymers are described which are prepared from 2,4?-diiso-cyanate diphenylmethane (2,4?-MDI), a polyol component and an aliphatic diisocyanate. These prepolymers can be cured with aliphatic, cycloaliphatic and/or aromatic amines to form a cured urethane elastomer. In comparison to cured urethane elastomers based on monomeric 2,4?-MDI, these prepolymers provide elastomers with extended pour life, i.e. they exhibit a slower rate of viscosity buildup after curative and prepolymer are mixed which results in a reduced propensity to crack during the curing process and gives the opportunity to cast larger parts. In comparison to polyurea/urethanes prepared from cured TDI-prepolymers and which optionally include H12-MDI, the prepolymers of the invention have better health and safety aspects.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: August 14, 2012
    Assignee: Bayer MaterialScience AG
    Inventors: Jens Krause, James-Michael Barnes, Manfred Schmidt, Wieland Hovestadt
  • Patent number: 8188208
    Abstract: This invention relates to solid elastomers which exhibit reduced dimensional shrinkage, and to a process for the production of these elastomers. These elastomers comprise the reaction product of a polyisocyanate component or prepolymer, with an isocyanate-reactive component comprising a high molecular weight component having an EO cap having less than 17% by wt., a chain extender and optionally, a crosslinker, in the presence of at least one catalysts. These solid elastomers are produced via the reaction injection molding process in a closed mold, preferably at an isocyanate index of about 70 to about 130.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: May 29, 2012
    Assignee: Bayer MaterialScience LLC
    Inventors: Stephen J. Harasin, William D. Keller, Jr.
  • Patent number: 8134022
    Abstract: The present invention relates to a polyether carbonate polyol made by copolymerizing a starter molecule with carbon dioxide, at a pressure ranging from about 10 psia to about 2,000 psia, and an alkylene oxide, at a temperature ranging from about 50° C. to about 190° C. and in the presence of from about 0.001 wt. % to about 0.2 wt. % of a substantially non-crystalline double metal cyanide (DMC) catalyst, wherein the polyol has an incorporated carbon dioxide content of from about 1 wt. % to about 40 wt. %, wherein the ratio of cyclic carbonate by-product to total carbonate is less than about 0.3 and wherein the weight percentages are based on the weight of the polyol. The inventive polyether carbonate polyols may find use in producing polyurethane foams, elastomers, coatings, sealants and adhesives with improved properties.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: March 13, 2012
    Assignee: Bayer MaterialScience LLC
    Inventors: Karl W. Haider, Kenneth G. McDaniel, Sr., John E. Hayes, Jianzhong Shen
  • Patent number: 8124665
    Abstract: This invention relates to fire-resistant, flexible, molded, medium density polyurethane foams. These foams typically have a density of from 10 to 30 pcf. The foams are the reaction product of a) at least one polyester polyol, b) at least one highly branched polyether polyol, c) at least one chain extender, d) a polymethylene poly(phenyl isocyanate), an isocyanate group containing prepolymer based on a polymethylene poly(phenyl isocyanate), or mixtures thereof, e) a solid flame retardant and f) water. This invention also relates to a process for preparing these polyurethane foams in open molds.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: February 28, 2012
    Assignee: Bayer MaterialScience LLC
    Inventors: James W. Rosthauser, Theodore S. Frick, Michael T. Wellman
  • Patent number: 8079752
    Abstract: The invention relates to a mixer reactor of the rotor-stator type. This mixer reactor comprises a substantially rotationally symmetric housing which has a distributing chamber, a mixing chamber, a front plate that modifies the cross-section of the housing between these two chambers, and there are separate inlets into the mixing chamber for at least two substances and an outlet for removing the mixed material or product. The inlet for the first substance is provided in the axis of rotation of the mixing chamber. Two or more channels are aligned radially outward from this inlet, and the first substance is transported through these channels and into the mixing chamber. The inlet for the at least second substance is constructed in the form of a plurality of openings in the front plate, these inlet openings being are arranged rotationally symmetrically to the axis of rotation. Each of these inlet openings for the at least second substance has a corresponding pin which can be displaced in the axial direction.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: December 20, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Andreas Rausch, Christian Steffens, Dietmar Wastian, Manfred Keller-Killewald, Matthias Böhm, Joachim Ritter, Marcus Grünewald
  • Patent number: 8063241
    Abstract: The present invention relates to a process for the preparation of toluene-diisocyanate. In this process, toluenediamine is reacted with phosgene to give crude toluene-diisocyanate, the crude toluene-diisocyanate is purified by distillation, the distillation residue formed during the distillation is hydrolysed at temperatures of less than 230° C. under absolute pressures of less than 30 bar, and the toluenediamine formed by this process is subsequently recycled into the reaction of toluenediamine and phosgene.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: November 22, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Wolfgang Lorenz, Lars Padeken, Bernd Pennemann, Friedhelm Steffens, Lothar Weismantel
  • Patent number: 8030522
    Abstract: The invention relates to a process for the production of toluene diisocyanate, in which the crude toluenediamine obtained from the hydrogenation is purified and then phosgenated. The purification step reduces the total amount of cyclic ketones to less than 0.1% by weight, based on 100% by weight of the toluenediamine.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: October 4, 2011
    Assignees: Bayer MaterialScience LLC, Bayer MaterialScience AG
    Inventors: Joachim Zechlin, Bernd Pennemann, Friedhelm Steffens, Wenbin Ji
  • Patent number: 8022200
    Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures which are characterized by a low color number and which contain carbodiimide (CD) and/or uretonimine (UI) groups. This invention also relates to the isocyanate mixtures obtained by this process, to their use for the preparation of blends with further isocyanates, and to the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams from these isocyanate mixtures.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: September 20, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Stefan Wershofen, Manfred Schmidt, Hans-Georg Pirkl, Nobuhiro Kamiyama, Shinichi Murakami, Tetsuo Harada
  • Patent number: 8003205
    Abstract: This invention relates to sprayable polyurethaneurea compositions, composite articles comprising at least one layer of these polyurethaneurea compositions and at least one layer of a polyurethaneurea foam forming composition, and to a process for the production of these composites.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: August 23, 2011
    Assignee: Bayer MaterialScience LLC
    Inventor: James W. Rosthauser
  • Patent number: 7977501
    Abstract: The present invention relates to a polyether carbonate polyol made by copolymerizing a starter molecule with carbon dioxide, at a pressure ranging from about 10 psia to about 2,000 psia, and an alkylene oxide, at a temperature ranging from about 50° C. to about 190° C. and in the presence of from about 0.001 wt. % to about 0.2 wt. % of a substantially non-crystalline double metal cyanide (DMC) catalyst, wherein the polyol has an incorporated carbon dioxide content of from about 1 wt. % to about 40 wt. %, wherein the ratio of cyclic carbonate by-product to total carbonate is less than about 0.3 and wherein the weight percentages are based on the weight of the polyol. The inventive polyether carbonate polyols may find use in producing polyurethane foams, elastomers, coatings, sealants and adhesives with improved properties.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: July 12, 2011
    Assignee: Bayer MaterialScience LLC
    Inventors: Karl W. Haider, Kenneth G. McDaniel, John E. Hayes, Jianzhong Shen
  • Patent number: 7951896
    Abstract: The present invention relates to NCO-terminated prepolymers that are stable to sedimentation, to a process for the production of these NCO-terminated prepolymers, and to the production of polyurethanes from these NCO-terminated polymers.
    Type: Grant
    Filed: July 3, 2006
    Date of Patent: May 31, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Hartmut Nefzger, Manfred Schmidt, James-Michael Barnes, Ernst Felske, Jens Krause
  • Patent number: 7919575
    Abstract: The process of the present invention provides for the manufacture of lower molecular weight DMC-catalyzed polyols than is possible using non-acidified continuous addition of starter (CAOS) feeds, by adding excess acid to a starter feed stream over that required for mere neutralization of the basicity of the starter. The benefits of the invention also extend to starters which do not contain basicity. Polyether polyols made by the inventive process may be used to produce improved polyurethane products such as coatings, adhesives, sealants, elastomers, foams and the like.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: April 5, 2011
    Assignee: Bayer MaterialScience LLC
    Inventor: Edward Browne
  • Patent number: 7893189
    Abstract: The invention is directed to novel poly(ether-ester)polyols, processes for their production from monocarboxylic or polycarboxylic acid esters with one or more bound polyether chain(s). This invention also relates to the production of polyurethane materials in which the isocyanate-reactive component comprises these poly(ether-ester)polyols.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: February 22, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Klaus Lorenz, Jorg Hofmann, Hartmut Nefzger
  • Patent number: 7893150
    Abstract: The present invention relates to polymer dispersions in polyester polyols, a process for producing them and their use for the production of polyurethanes, in particular microcellular polyurethanes. These polyester polyols have sulfur atoms and are free of olefinically unsaturated groups.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: February 22, 2011
    Assignee: Bayer MaterialScience AG
    Inventors: Hartmut Nefzger, Erika Bauer, Erhard Michaels
  • Patent number: 7828991
    Abstract: This invention relates to novel polyether polyols which are prepared by alkoxylation of renewable resource materials, and particularly cashew nutshell liquid (CNSL), and to a process for the preparation of these novel polyether polyols. This invention also relates to flexible polyurethane foams prepared from these long chain polyether polyols, and to a process for the production of these flexible polyurethane foams.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: November 9, 2010
    Assignee: Bayer MaterialScience LLC
    Inventors: Jack R. Reese, Micah N. Moore, Don S. Wardius, Stanley L. Hager
  • Patent number: 7825276
    Abstract: The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures of low color number containing carbodiimide (CD) and/or uretonimine (UI) groups, the isocyanate mixtures obtainable by this process and the use thereof for the preparation of blends with further isocyanates and for the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: November 2, 2010
    Assignee: Bayer MaterialScience AG
    Inventors: Stefan Wershofen, Marcus Steinwegs
  • Patent number: 7781624
    Abstract: This invention relates to a process for the continuous preparation of nitrobenzene. This process comprises the adiabatic nitration of benzene with a mixture of sulfuric acid and nitric acid, in which the sum of the concentrations in the reaction zone of the metal ions which form sparingly soluble metal sulfates is less than 900 mg/l, based on the volume of the aqueous phase which contains sulfuric acid.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: August 24, 2010
    Assignee: Bayer MaterialScience AG
    Inventors: Andreas Rausch, Thomas Knauf, Jeffrey Bolton, Alexandre Racoes
  • Patent number: 7776969
    Abstract: This invention relates to novel ethylenically unsaturated macromers, preformed stabilizers prepared from these novel macromers, polymer polyols prepared from either the novel ethylenically unsaturated macromers or the preformed stabilizers, and to processes for the preparation of these compositions.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: August 17, 2010
    Assignee: Bayer MaterialScience LLC
    Inventor: Rick L. Adkins
  • Patent number: 7772330
    Abstract: The present invention provides a process for conditioning double metal cyanide (DMC) catalysts, which are employed in the preparation of polyether polyols based on starter compounds having active hydrogen atoms, the preparation of polyether polyols using the conditioned catalysts and the use of the polyether polyols prepared in this way for the preparation of polyurethane materials.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: August 10, 2010
    Assignee: Bayer MaterialScience AG
    Inventors: Klaus Lorenz, Jorg Hofmann