Abstract: A process for the isolation of polycarbonate produced by the interfacial polymerization process is disclosed. Accordingly, the process entails (a) evaporating the organic solvent from the solution that contains solvent and polycarbonate to obtain a material system that contains 90 to 99.95% polycarbonate, the percent being relative to the weight of the system, and (b) passing the material system through inlet openings of a separating vessel to obtain a plurality of streams of polycarbonate, on entry into the inlet openings said material system being supersaturated with volatile constituents to an extent of at least 1 bar and having a temperature of 250° to 340° C. and a flow rate of 0.1 to 20 kg/hour, and (c) degassing the streams in the separating vessel wherein the pressure is 0.1 to 20 mbar to effect degassing of the polycarbonate.
Type:
Grant
Filed:
April 14, 2005
Date of Patent:
October 31, 2006
Assignee:
Bayer MaterialScience AG
Inventors:
Jörg Kirchhoff, Thomas König, Klemens Kohlgrüber, Steffen Kühling, Dirk Van Meirvenne
Abstract: A method of preparing a molded cross vehicle beam which includes a hollow blow molded thermoplastic rigid member that is integrally attached to a rigid support, e.g., a U-shaped metal plate, and at least one attachment element, is described. The rigid support (12) has a first surface, a second surface and a plurality of perforations having edges. The attachment element(s) (81, 84) have a first surface, a second surface and a plurality of perforations having edges. The attachment element provides a means of attaching the molded cross vehicle beam to a separate structure (e.g., the A-pillars of an automobile). A thermoplastic parison precursor of the hollow rigid thermoplastic member (15) is blow molded against the first surfaces of the rigid support (12) and the attachment element (81, 84).
Abstract: Aromatic amines are produced from aromatic hydrocarbons by a) reacting the aromatic hydrocarbon(s) with a mixture of nitric acid and sulfuric acid to generate a two-phase reaction mixture, b) separating the reaction mixture into an aqueous acid phase and an organic phase containing the nitroaromatic compounds c) washing the organic phase to purify the nitroaromatic compound(s), d) hydrogenating the nitroaromatic compound(s) in the presence of a catalyst to produce the aromatic amine(s) and water of reaction, and e) separating the water of reaction formed in step d) from the aromatic amine(s), in which the water of reaction separated in step e) is used to wash the organic phase containing the nitroaromatic compounds in step c).
Abstract: Disclosed herein is a water-dispersible powder consisting essentially of polymers T comprising recurring thiophene units and at least one further polyanionic polymer P and process for preparing and using the same.
Type:
Grant
Filed:
November 20, 2001
Date of Patent:
October 10, 2006
Assignee:
H. C. Starck GmbH
Inventors:
Bernhard Wessling, Stephan Kirchmeyer, Dietrich Gehrmann
Abstract: The invention relates to a method for producing wolfram carbides by gas-phase carburetion of wolfram powders and/or suitable wolfram precursor compounds in powder form at temperatures above 850° C. According to the method a CO2/CO mixture with a CO2 content greater than the Boudouard equilibrium content corresponding to the carburetion temperature is used as carburetion gas phase.
Type:
Grant
Filed:
November 3, 1999
Date of Patent:
October 10, 2006
Assignee:
H. C. Starck GmbH & Co. KG
Inventors:
Gerhard Gille, Benno Gries, Jörg Bredthauer
Abstract: Process for the purification of toluenediisocyanate from a crude distillation feed which includes toluenediisocyanate, an organic solvent and less than 2% by weight phosgene by separating the crude distillation feed in a dividing-wall distillation column into at least four product fractions P1–P4. P1 is a phosgene enriched low-boiler product, P2 is a solvent-enriched product, P3 is a high boiler enriched bottoms and P4 is a toluenediisocyanate product stream.
Type:
Grant
Filed:
June 9, 2003
Date of Patent:
October 10, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Bill Brady, Friedhelm Steffens, Berthold Keggenhoff, Kai Verkerk, Gerhard Ruffert
Abstract: A moisture-curable, alkoxysilane-functional polyether urethanes containing a) 20 to 90% by weight, of a polyether urethane containing two or more reactive silane groups and one or more polyether segments, where the polyether segments have a number average molecular weight (Mn) of at least 3000 and a degree of unsaturation of less than 0.04 milliequivalents/g, and the sum of Mn of all of the polyether segments per molecule averages 6000 to 20,000, and the reactive silane groups are incorporated by the reaction of an isocyanate group with a compound of formula and b) 10 to 80% by weight, of a polyether urethane containing one reactive silane group and one or more polyether segments having Mn of 1000 to 15,000.
Type:
Grant
Filed:
October 22, 2003
Date of Patent:
October 3, 2006
Assignee:
Bayer MaterialScience LLC
Inventors:
Richard R. Roesler, Derek L. Crawford, Kurt C. Frisch, Dinesh Pethiyagoda, Karsten Danielmeier
Abstract: The present invention relates to a process for producing an aliphatic oligocarbonate diol comprising a) reacting an aliphatic diol with dimethyl carbonate at an elevated pressure in a reaction mixture, and b) subsequently removing unreacted methanol and dimethyl carbonate under a reduced pressure to uncap the terminal OH groups.
Type:
Grant
Filed:
December 12, 2003
Date of Patent:
September 26, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Jörg Tillack, Jörg Laue, Herbert Witossek, Andreas Schlemenat
Abstract: The present invention relates to novel polyurethane prepolymers (PU prepolymers) of low viscosity containing NCO groups blocked with compounds containing phenol groups and to their use for producing polyurethane polymers. The PU prepolymers are prepared by reacting one or more diisocyanates or polyisocyanates with at least one isocyanate-reactive compound with a functionality of at least 1.5 to form an NCO-functional polyurethane prepolymer and subsequently blocking the free NCO groups with at least one hydrocarbon resin containing phenolic OH groups and/or one optionally substituted phenol in the presence of a catalyst which comprises at least one triorganoamine.
Abstract: A thermoplastic molding composition comprising polycarbonate resin, at least one impact modifier and highly pure talc is disclosed. The talc is characterized in that it contains Al2O3 in an amount of less than 1% relative to the weight of said talc. The composition that features high toughness, good processability and low coefficient of thermal expansion is suitable for the manufacture of exterior parts of vehicles.
Type:
Grant
Filed:
December 12, 2000
Date of Patent:
September 12, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Holger Warth, Andreas Seidel, Thomas Eckel, Dieter Wittmann, Bernd Keller
Abstract: Slabstock foam free of cavities can be produced without any restriction, i.e. also from rapidly reacting chemical systems, by introducing the liquid reaction mixture from underneath, in front of, and/or through an optionally swivellable floor plate, wherein the floor plate and the inlet for introducing the liquid reaction mixture is arranged in a manner such that the reaction mixture above the floor plate is substantially still liquid.
Abstract: The invention relates to a process for preparing compounds of the general formula (I) to novel compounds of this substance class and also to their use as important precursors or for preparing important precursors for ?-conjugated polymers.
Abstract: A method of preparing a molded article by means of an in-mold decoration process, is described. The method includes, providing a laminate (4) of a plurality of separate releasable thermoplastic labels (14) superposed over a carrier film (26). A decoration (86) is applied in-line to the exposed second surface (68) of the labels (14), thereby forming a decorated laminate (5). The decorated laminate (5) is forwarded and indexed into a mold (20) such that the exposed first surface (77) of the carrier film (26) abuts at least a portion of the interior surface of the mold, and the decorated second surface (68) of the label (14) faces the interior space of the mold. Plastic material (e.g., thermoplastic material) is injected into the mold against the decorated surface of the label, thus forming a molded article. The carrier film (26) is then separated from the molded article.
Type:
Grant
Filed:
May 13, 2003
Date of Patent:
August 29, 2006
Assignee:
Bayer Materialscience LLC
Inventors:
Ronald W. Williams, Christopher Cooper, Stephen G. Smith, Timothy J. Jacobs
Abstract: The invention relates to novel compounds containing uretdione groups, to a process for preparing them by dimerizing aliphatic and/or cycloaliphatic isocyanates containing exclusively secondary and/or tertiary isocyanate groups and also to the use of uretdione polyisocyanates obtainable by this process from diisocyanates containing exclusively secondary and/or tertiary isocyanate groups as a starting component for polyurethane polymers, in particular as an isocyanate component in the preparation of uretdione powder coating crosslinkers.
Type:
Grant
Filed:
July 3, 2003
Date of Patent:
August 29, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Hans-Josef Laas, Reinhard Halpaap, Frank Richter, Jürgen Köcher
Abstract: A composition of matter (e.g., a molded article) is described. More particularly, the composition of matter includes: (a) a resinous component selected from at least one member of the group consisting of (co)polyester, (co)polycarbonates, acrylonitrile-butadiene-styrene, polyamide, polyurethane, polyalkyl(meth)acrylate and styrene copolymers; (b) at least one water-insoluble dye; (c) a carrier represented by the following formula, R1[—O—(CH2)n]mOR2 wherein R2is butyl, R1 is H, n is 2 or 3, and m is 2–35; (d) an emulsifier that is poly(oxy-1,2-ethanediyl), alpha-phenyl-omega-hydroxy, styrenated; and (e) a particulate or plate-like material, such as metal flakes.
Abstract: Energy absorbing flexible foams can be produced by reacting an isocyanate with a first polyol, prepared at least in part by an active double metal cyanide catalyst and a second polyether polyol is prepared at least in part by a basic or acidic catalyst.
Type:
Grant
Filed:
October 3, 2002
Date of Patent:
August 22, 2006
Assignee:
Bayer Corporation
Inventors:
Neil H. Nodelman, David A. Radovich, Albert Magnotta, Carl E. Holsinger
Abstract: A process for producing dielectric layers with low dielectric constants by thermal treatment of a sol-gel product of a multifunctional carbosilane, corresponding layers, and their use in the production of electronic components, are described.
Type:
Grant
Filed:
December 13, 2002
Date of Patent:
August 15, 2006
Assignee:
H.C. Starck GmbH
Inventors:
Stephan Kirchmeyer, Detlef Gaiser, Harald Kraus, Udo Merker
Abstract: The present invention relates to a binder composition containing A) at least one aqueous polyurethane-polyurea dispersion and B) at least one stabilizer containing a) at least one amine having a structural unit corresponding to formula (I) ?which has no hydrazide groups, b) at least one compound having a structural unit corresponding to formula (II) —CO—NH—NH—??(II) ?and c) optionally a stabilizing compound other than a) and b). The polyurethane dispersions are manufactured in the presence of components a) and b). It is possible for components a) and b), depending on the grade used, to be incorporated into the polymer framework as structural units.
Type:
Grant
Filed:
January 14, 2003
Date of Patent:
August 15, 2006
Assignee:
Bayer Aktiengesellschaft
Inventors:
Thorsten Rische, Karin Naujoks, Jürgen Meixner, Thomas Feller, Eberhard König
Abstract: The present invention relates to a process for cleaning multi-product production plants for polyester polyols with a cleaning polyol. The cleaning polyol can be used as a raw material in the production of further polyols.
Type:
Grant
Filed:
December 7, 2004
Date of Patent:
August 15, 2006
Assignee:
Bayer Materialscience AG
Inventors:
Hartmut Nefzger, Gerhard Klein, Erhard Michels, Ulrich Boddenberg
Abstract: The invention describes a process for the preparation of polycarbonate. The process includes (a) transesterifying at least one aromatic dihydroxyaryl compound and a diaryl carbonate in the melt in the presence of a catalyst, (b) mixing the melt obtained in step (a) with a foaming agent (c) passing the mixture at 250 to 340° C. through inlet openings of a separating vessel at a rate of 0.1 to 20 kg/hour, to obtain a plurality of streams of foamed polycarbonate and degassing the streams of foamed polycarbonate in the separating vessel wherein the pressure is 0.1 to 20 mbar.
Type:
Grant
Filed:
April 14, 2005
Date of Patent:
August 15, 2006
Assignee:
Bayer Materialscience AG
Inventors:
Jörg Kirchhoff, Thomas König, Klemens Kohlgrüber, Steffen Kühling, Melanie Möthrath, Dirk Van Meirvenne