Patents Represented by Attorney, Agent or Law Firm Lyndanne M. Whalen
  • Heat exchange media for the thermal cracking of carbamic acid esters
    Patent number: 5883291
    Abstract: Inert, thermally stable high-boiling solvents which have a defined boiling point or which boil over a narrow range are used as heat exchange media during thermal cracking of carbamic acid esters (urethane cracking).
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: March 16, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dieter Schleenstein, Christian Rasp, Georg Ronge, Oswald Wilmes
  • Molded polyurethane articles prepared from recycled polyols and processes for their production and use
    Patent number: 5879608
    Abstract: Molded polyurethane articles are made by reacting polyisocyanates with polyol compositions obtained by chemical decomposition of polyurethane and/or polyurea waste in a mold. The polyol compositions employed in this invention have an OH value of from about 100 to about 500 mg KOH/g, a water content of from 0 to about 5 wt. % and a viscosity at 20.degree. C. of more than 2,000 mPa.multidot.s. These molded polyurethane articles preferably have a sandwich structure in which the core is a polyurethane and there is at least one outer layer made from an optionally fiber-reinforced plastic material. These molded polyurethane articles are useful in the motor vehicle, furniture, machine and equipment manufacturing industries.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: March 9, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Adolf Lammeck, Werner Rasshofer
  • Process for the production of aromatic amines
    Patent number: 5877350
    Abstract: Aromatic amines are produced by hydrogenation of the appropriate aromatic nitro compounds in the vapour phase on fixed catalysts. The catalysts contain supported metals active in hydrogenation, the reaction is carried out under adiabatic conditions at a pressure of from 1 to 30 bar, an inlet temperature of from 200.degree. to 400.degree. C. and a maximum catalyst temperature of 500.degree. C.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: March 2, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Langer, Hans-Josef Buysch, Ursula Pentling, Paul Wagner
  • Process for the production of polyether aminoalcohols
    Patent number: 5874623
    Abstract: Disclosed herein is a method of preparing polyether aminoalcohol by reacting a primary aminoalcohol with a polyether terminated with a good leaving group.
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: February 23, 1999
    Assignee: Bayer Corporation
    Inventors: Rick L. Adkins, William E. Slack
  • Azeotrope-like compositions of 1,1,1,3,3-pentafluoropropane and tetramethylsilane
    Patent number: 5854296
    Abstract: Azeotropic compositions made up of from about 60 to about 78% by weight of 1,1,1,3,3-pentafluoropropane and from about 22 to about 40% by weight of tetramethylsilane have been found to be particularly useful as blowing agents for the production of polyurethane foams.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: December 29, 1998
    Assignee: Bayer Corporation
    Inventors: Joachim Werner, Scott A. Kane, Charles E. Mortimer, Herman P. Doerge, Eric F. Boonstra
  • HCFC-141b blown foams with low levels of HCFC-1131a by-products
    Patent number: 5849807
    Abstract: Rigid polyurethane foams having low thermal conductivity values are produced by reacting an organic polyisocyanate with an organic material having at least two isocyanate reactive hydrogen atoms and an OH value of from about 200 to about 650 in the presence of a blowing agent. The blowing agent is a mixture which includes dichlorofluoroethane (HCFC-141b) and greater than 1.0% by weight (based on total weight of the foam forming mixture) water. The foams obtained are characterized by a thermal conductivity of less than about 0.160 Btu-in./hr.ft.sup.2 .degree. F., preferably less than about 0.150 Btu-in./hr.ft.sup.2 .degree. F. These foams are particularly useful as insulation materials.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: December 15, 1998
    Assignee: Bayer Corporation
    Inventor: Herman P. Doerge
  • Polyether polyols, polyol formulation containing them and their use in the production of hard polyurethane foams
    Patent number: 5840781
    Abstract: Polyol formulations, containing polyether polyols possessing 40 to 80 wt % of tertiary amino groups and having an OH number of 300 to 500, preferably 350 to 420, obtainable by addition of exclusively propylene oxide to o-toluylenediamine, which contain cyclopentane and/or n- and/or i-pentane and/or hydrofluoro alkanes as blowing agent, are used for the manufacture of rigid polyurethane foams by reacting with organic polyisocyanates, optionally further compounds with at least two hydrogen atoms reactive to isocyanates, optionally in the presence of water, and further blowing agents known per se as well as conventional auxiliaries and additives.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: November 24, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Werner Dietrich, Manfred Dietrich, Wilhelm Lamberts, Walter Klan
  • Rigid foams with improved insulation properties and a process for the production of such foams
    Patent number: 5840212
    Abstract: Rigid foams having improved insulation properties are made by reacting a polyisocyanate with an isocyanate-reactive material in the presence of a blowing agent mixture composed of from about 1 to about 30% by weight of at least one C.sub.2 -C.sub.5 polyfluoroalkane and from about 70 to about 99% by weight of an HCFC, preferably an HCFC selected from chlorodifluoromethane, 1,1-dichloro-1-fluoroethane, 1-chloro-1,1-difluoroethane and mixtures thereof.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: November 24, 1998
    Assignee: Bayer Corporation
    Inventor: Herman P. Doerge
  • Toluene diisocyanate residue-based compositions having reduced acid values
    Patent number: 5837794
    Abstract: TDI residue-based urethane-filled isocyanate compositions are produced by reacting a TDI residue satisfying specified criteria with a monofunctional alcohol in amounts such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. This reaction product is then dissolved in a diisocyanate or polyisocyanate before, during or after reaction of that product with an epoxide having an epoxide equivalent weight of from about 44 to about 400 at a temperature of up to 120.degree. C. These TDI residue-based urethane-filled isocyanate compositions are particularly useful in the production of polyurethanes.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: November 17, 1998
    Assignee: Bayer Corporation
    Inventors: William E. Slack, Scott A. Kane, James W. Rosthauser
  • Tertiary amines having carbonate and urethane groups
    Patent number: 5834579
    Abstract: Tertiary amines having carbonate and urethane groups and optionally hydroxyl groups are produced by reacting a) a polyhydric alcohol and b) a primary-tertiary diamine with c) a carbonic acid derivative selected from the group consisting of optionally cyclic carbonates, urea, phosgene and bis-chlorocarbonates of alcohols of the same type as those used as component a). This reaction may be carried out in one or two steps. The tertiary amines produced by this process are useful as catalysts, which may optionally be incorporated into an isocyanate-reactive material, in the isocyanate addition reaction for the production of polyurethane plastics. These tertiary amines are particularly useful for the production of foam backed plastic films.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: November 10, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Konig, Ulrich Liman, Josef Sanders
  • Process for producing aromatic amines
    Patent number: 5808157
    Abstract: Aromatic amines are produced by hydrogenation of the associated aromatic nitro compounds in the gas phase over fixed catalysts. The catalysts contain active hydrogenation metals on supports. The reaction is conducted at a pressure of 2-50 bar and at a temperature in the range 250.degree.-500.degree. C. under adiabatic conditions. A circulating gas is passed over the catalyst, which circulating gas contains 3-150 moles of hydrogen, 2-100 moles of the amino groups to be formed per mole of nitro groups, and 2 to 6 moles of water per amino group equivalent. The amine and water formed, as well as a purification stream, are separated from the circulating gas. Thereafter the circulating gas is enriched with volatilised aromatic nitro compound and fresh hydrogen and recycled.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: September 15, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Langer, Hans-Josef Buysch, Paul Wagner, Ursula Pentling
  • Toluene diisocyanate residue-based compositions and the use of such compositions as fillers for hydroxyl compounds
    Patent number: 5804648
    Abstract: A TDI residue generated from the phosgenation of toluene diamine having an ortho-isomer content of less than 0.5% is used to produce a urethane-filled hydroxyl compound. The TDI residues useful in this invention must contain at least 10% monomeric TDI and have a total NCO content of at least 20%. These TDI residues are reacted with a monofunctional alcohol in an amount such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. The resultant composition may then be dissolved in a polyhydroxyl compound to produce a urethane-filled polyhydroxyl compound. This urethane-filled polyhydroxyl compound may then be reacted with a polyisocyanate to produce a polyurethane.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: September 8, 1998
    Assignee: Bayer Corporation
    Inventor: William E. Slack
  • Hexamethylene diisocyanate residue-based compositions as fillers for polyether polyols
    Patent number: 5789497
    Abstract: Urethane-filled, polyether polyols are prepared by reacting (1) a hexamethylene diisocyanate residue from the phosgenation of hexamethylene diamine with contains less than 10% by weight monomeric hexamethylene diisocyanate and has a total isocyanate group content of at least 25% with (2) an alcohol containing at least four ether linkages in amounts such that the equivalent ratio of isocyanate groups in (1) to hydroxyl groups in (2) is from about 0.9:1.0 to about 1.0:0.9 and subsequently dissolving this reaction product in a polyether polyol.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: August 4, 1998
    Assignee: Bayer Corporation
    Inventor: William E. Slack
  • Process for the production of a rigid polyurethane foam and a composition for the production of a rigid polyurethane foam
    Patent number: 5786400
    Abstract: The present invention relates to a method of producing a rigid polyurethane foam in which a polyisocyanate containing a benzene ring is used as an organic isocyanate and a polyether polyol and/or polyester polyol is used as a polyol, characterized in that a hydrocarbon is used as the blowing agent and a compound having a hydrophobic group and a hydroxyl group in the molecule is used as an emulsifying agent. The blowing agent is preferably a hydrocarbon selected from the group consisting of cyclopentane, n-pentane and iso-pentane.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: July 28, 1998
    Assignee: Sumitomo Bayer Urethane Co., Ltd.
    Inventors: Martin Brock, Mitsuaki Ikebe, Teruo Hama
  • Amine-initiated polyether polyols and a process for their production
    Patent number: 5786405
    Abstract: Clear, amine-initiated polyether polyols are made by epoxidizing an amine in the presence of an alkali metal hydroxide catalyst. After the desired degree of epoxidation has been achieved, a hydroxy-carboxylic acid is added to the epoxidized mixture in an amount sufficient to neutralize any remaining alkali metal hydroxide. The polyols produced in this manner are particularly useful for the production of polyurethane and apolyisocyanurate foams.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: July 28, 1998
    Assignee: Bayer Corporation
    Inventors: Steven L. Schilling, Herman P. Doerge, Lotar H. Hanusa
  • Catalysts for removing sulfur compounds from industrial gases, a process for their production and their use
    Patent number: 5763350
    Abstract: Catalysts for removing sulfur compounds almost completely from industrial gases are made by impregnating a suitable support with an oxide of at least one element selected from Group VIB of the Periodic System of Elements and at least two other oxides of elements selected from Groups IB, IIB, VIB and VIIIB of the Periodic System of Elements. Industrial gases in which sulfur compounds are present are brought into contact with these catalysts under conditions such that the sulfur compounds are converted to elemental sulfur and thus removed from the industrial gas.
    Type: Grant
    Filed: February 6, 1992
    Date of Patent: June 9, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Otto Immel, Harald Muller
  • Ether-linked amine-terminated polyethers and a process for their production
    Patent number: 5763667
    Abstract: Ether-linked amine-terminated polyethers are produced by reacting (1) a polyether polyol in which substantially all of the hydroxyl groups have been replaced with good leaving groups with (2) an aminoalcohol and/or aminothiol and (3) a deprotonating agent. The aminopolyethers obtained by this process are characterized by low viscosities and excellent reactivities over a wide range of molecular weights and functionalities.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: June 9, 1998
    Assignee: Bayer Corporation
    Inventors: Rick L. Adkins, William E. Slack
  • Isocyanate prepolymers produced from toluene diisocyanate residue dissolved in toluene diisocyanate
    Patent number: 5756636
    Abstract: A substantially solid free isocyanate prepolymer is made by reacting an isocyanate mixture which is made up of a toluene diisocyanate residue containing monomeric toluene diisocyanate and optionally, additional monomeric toluene diisocyanate in an amount such that the total NCO content is at least 37% with a polyether polyol having an ethylene oxide content of at least 30%. The polyether polyol has a molecular weight of from about 200 to about 6,000 and a functionality of from 2 to 6. The product prepolymers are particularly useful in the production of polyurethanes.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: May 26, 1998
    Assignee: Bayer Corporation
    Inventors: William E. Slack, Jyothi S. Pisipati
  • Dicyclohexylmethane diisocyanate residue-based compositions and the use of such compositions as fillers
    Patent number: 5753749
    Abstract: Urethane-filled compositions are produced by reacting a dicyclohexylmethane diisocyanate residue or a dicyclohexylmethane diisocyanate residue containing mixture with a monofunctional alcohol containing at least one ether group in an amount such that the equivalent ratio isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. The diisocyanate residue or residue-containing mixture must contain at least 20% by weight monomeric diisocyanate and have a total NCO content of at least 10%. The diisocyanate residue is produced by phosgenating dicyclohexylmethane diamine in which less than 20% polymeric diamine is present. The urethane filled compositions produced in this manner may then be dissolved in either a polyol or a polyisocyanate and subsequently used to produce polyurethanes in known manner.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: May 19, 1998
    Assignee: Bayer Corporation
    Inventor: William E. Slack
  • Toluene diisocyanate residue-based compositions as fillers for polyisocyanates
    Patent number: 5753750
    Abstract: TDI residue-based urethane-filled isocyanate compositions are produced by reacting a TDI residue satisfying specified criteria with a monofunctional alcohol in amounts such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. This reaction product is then dissolved in a diisocyanate or polyisocyanate. These TDI residue-based urethane-filled isocyanate compositions are particularly useful in the production of polyurethanes.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: May 19, 1998
    Assignee: Bayer Corporation
    Inventors: William E. Slack, Jyothi S. Pisipati