Patents Examined by Maurice J. Welsh
  • Patent number: 5436291
    Abstract: Synthetic biomaterials are provided with irreversibly bound amino diphosphonate, polyphosphonate, or other anticalcification agent to prevent in vivo calcification. Such biomaterials include biocompatible elastomers such as polyurethane and/or polydimethylsiloxane, and the like which are intended for invasive, or in-dwelling use in a human or animal body. Illustratively, reaction conditions utilizing hi-or polyfunctional epoxides result in epoxide bridge incorporation of the anticalcification agent to the biomaterial elastomer.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: July 25, 1995
    Assignee: University of Michigan, The Board of . . .
    Inventors: Robert J. Levy, Ravi Joshi
  • Patent number: 5422380
    Abstract: There is disclosed a sound-absorbing syntactic foam comprising expanded polystyrene microspheres, dispersed randomly in a polyurethane matrix.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: June 6, 1995
    Assignee: Westinghouse Electric Corporation
    Inventors: Morris A. Mendelsohn, Richard Bolton, Francis W. Navish, Jr.
  • Patent number: 5418259
    Abstract: This invention relates to a process of preparing polyurethane polymers by reaction of an isocyanate composition having an isocyanate equivalent weight of from 180 to 300 and comprising in from at least 50 weight percent a prepolymer, with an active hydrogen-containing substance in the presence of water which provides for at least 50 mole percent of the total blowing requirement. The prepolymer is obtained by reacting a molar excess of a polyisocyanate comprising, in from at least 70 weight percent, 4,4'-methylene diphenylisocyanate with an isocyanate-reactive composition containing (a) a branched diol or triol having a molecular weight of from 60 to 300, and (b) a polyoxyalkylene polyol or mixtures thereof having an average functionality of from 2 to 4 and a molecular weight of from 3000 to 12000, wherein the parts by weight ratio of (a):(b) is from 0.01:1 to 0.25:1.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: May 23, 1995
    Assignees: The Dow Chemical Company, Dow Italia S.p.A.
    Inventors: Rene Broos, Frans Paap, Bruno Maccari
  • Patent number: 5401499
    Abstract: An insoluble material for adsorbing a pyrogen comprising a polymer of an aziridine compound. According to the present invention, a large mount of the pyrogen can be easily removed from a solution containing pyrogen, and a large amount of the material for adsporbing the pyrogen can be prepared in easy steps. Therefore, the adsorbing material can greatly contribute to the preparation of medicines.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: March 28, 1995
    Assignee: Shinkohjinkasei Co., Ltd.
    Inventors: Chuichi Hirayama, Keijun Hiraoka, Sunao Morimoto
  • Patent number: 5395859
    Abstract: The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which are capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: March 7, 1995
    Assignee: AlliedSignal Inc.
    Inventors: Timothy R. Demmin, Robert C. Parker, Richard E. Eibeck, Gary M. Knopeck, Donna M. Ruszaj
  • Patent number: 5393858
    Abstract: A polyurethane or polyurethane-urea elastomeric composition, characterized in that the composition is a reaction product of:(A) a soft segment macrodiol which is either:(i) a homopolymer represented by formula I,HO--[(CH.sub.2).sub.n O].sub.m --H Iwherein n represents an integer greater than 5 and less than 13, m is a number such that the number average molecular weight of the compound of formula I falls in the range from 218 to 5000 and optionally at least one hydrogen atom represented in formula I is substituted by a C.sub.1 to C.sub.3 alkyl group or a halogen atom;(ii) a copolymer containing at least 25% by mass of repeating units --(CH.sub.2).sub.n O-- wherein n is as defined in formula I above; or(iii) mixture of macrodiols comprising greater than 10% of a macrodiol as defined in formula I above;(B ) an aliphatic or aromatic diisocyanate known in the art of polyurethane manufacture; and(C) optionally a chain extender.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: February 28, 1995
    Assignees: Commonwealth Scientific and Industrial Research Organisation, Unisearch Limited
    Inventors: Gordon F. Meijs, Ezio Rizzardo, Arthur Brandwood, Pathiraja Gunatillake, Klaus H. Schindhelm
  • Patent number: 5393799
    Abstract: Process for the preparation of rigid polyurethane foam by reaction of a polyfunctional isocyanate-reactive composition with a polyisocyanate composition comprising the reaction product of a stoichiometric excess of an organic polyisocyanate and a substantially fluorinated isocyanate-reactive compound, optionally in the presence of an inert, insoluble fluorinated compound.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: February 28, 1995
    Assignee: Imperial Chemical Industries PLC
    Inventors: Rik De Vos, David Thorpe, Gonda Van Essche
  • Patent number: 5391602
    Abstract: Radiation-cured pressure-sensitive adhesives are provided comprising a radiation cured polyurethane backbone capped with both an acrylic or methacrylic reactive terminating group and residues of a mono-ol or polyol non-reactive terminating group. The adhesives include a functional amount of a thio compound which provides for improved control in pressure-sensitive adhesive properties when the adhesive precursor is irradiated.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: February 21, 1995
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventor: Martin Skoultchi
  • Patent number: 5391683
    Abstract: Aromatic polyisocyanates, e.g., toluene diisocyanate, are prepared by reacting/contacting at least one aromatic compound (A) bearing at least two primary amine substituents, e.g., toluenediamine, xylylenediamine and/or phenylenediamine,, with phosgene, in gaseous phase and in a reactor/reaction zone devoid of active mechanical stirring.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: February 21, 1995
    Assignee: Rhone-Poulenc Chimie
    Inventors: Faouzi Joulak, Denis Revelant, Pascal Vacus
  • Patent number: 5391613
    Abstract: Unsaturated polyurethanes, and the use thereof as reactive emulsifiersUnsaturated polyurethanes which contain from 20 to 80% by weight of polyethylene glycol units and can be prepared by reactinga) at least one organic polyisocyanate,b) an unsaturated fatty alcohol, a polyalkylene glycol ether thereof or an unsaturated acid ester containing one hydroxyl group,c) one or more diols which additionally contain at least one further hydroxyl group or carboxyl group andd) a polyethylene glycol having a molecular weight in the region of 750 to 10,000, with maintenance of an NCO/OH equivalent ratio, based on all the starting components a) to d), of from 0.7:1 to 1.2:1.These unsaturated polyurethanes are used as reactive emulsifiers for the preparation of dispersions of hydrophobic synthetic resins which can be cured by means of free radicals and/or oxidatively.
    Type: Grant
    Filed: March 3, 1994
    Date of Patent: February 21, 1995
    Assignee: Hoechst AG
    Inventors: Gerhard Brindoepke, Joachim Zoeller
  • Patent number: 5391614
    Abstract: This invention relates to a process for coating a substrate which comprises contacting the substrate with a low volatility organic (so-called "low VOC") coating composition having a viscosity as measured by ZAHN cup 2 of less than about 200 seconds and consisting essentially of at least one polyisocyanate prepolymer which is the reaction product of a polyisocyanate with an active hydrogen-containing compound selected from the group consisting of monoahls, polyols, imines, oxazolidines, and combinations thereof, a solvent in an amount of between 0% and 45% by weight based upon the amount of said polyisocyanate in said composition, and a tertiary amine catalyst, said composition being essentially free of any volatile mono- and di-isocyanates, and said composition being moisture curable upon exposure to atmospheric moisture. Also claimed is the coating composition itself.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: February 21, 1995
    Assignee: Olin Corporation
    Inventors: Kiran B. Chandalia, Michael J. Morgan, Michael M. Martinez, James M. O'Connor, Stephen P. Noe
  • Patent number: 5391682
    Abstract: A thermoplastic polyurethane elastomer containing a very small amount of small grains, and having a high molecular weight and a narrow molecular-weight distribution. Such high-quality thermoplastic polyurethane is excellent in melt moldability and allows to prevent yarn breakage in producing fibers by melt spinning, for example. Such polyurethane elastomer can be produced by melt-polymerizing a prepolymer and a low-molecular diol at a relatively high temperature in a short period of time. This invention also provides an apparatus for producing the polyurethane elastomer, and fibers formed of said elastomer.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: February 21, 1995
    Assignee: Kanebo, Ltd.
    Inventors: Yasuhiro Ogawa, Kenzo Sagawa, Takahiro Kitano, Michiya Yamashita, Tadaaki Yamada, Toshio Yamauchi
  • Patent number: 5391620
    Abstract: A rheology-influencing agent for coating media, containing a mixture of a (meth)acrylic copolymer containing hydroxyl groups and/or one or more polyesters containing hydroxyl groups, a hydroxy functional microdispersion obtainable by preparing a solution of one or more film-forming polyesters containing hydroxyl and/or carboxyl groups and/or (meth)acrylic copolymers containing hydroxyl and/or carboxyl groups, the foregoing mixture being reacted with a diisocyanate, and an aliphatic primary monoamine.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: February 21, 1995
    Assignee: Herberts Gesellschaft Mit Beschrankter Haftung
    Inventors: Klaus Bederke, Ralf Dahm, Hermann Kerber, Walter Schubert, Friedrich Hermann, Heinz-Walter Reifferscheidt
  • Patent number: 5389692
    Abstract: A co-polymer composition for coating porous structural material includes a compatible surfactant resulting in a structural inter-bonding between the coating composition and the structural material. The co-polymer composition cured in a layer of unsupported foam has sufficient strength to be used as a substitute for comparably or larger sized layers of re-enforced concrete for conducting fluids while resisting compressive loads. A co-polymer foam composition for coating structural material cures to have an atmosphere-facing surface that is substantially impervious to corrosive substance penetration.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: February 14, 1995
    Inventor: Richard L. Bertram
  • Patent number: 5387750
    Abstract: A method for producing an in-mold coated plastic article having an adherent coating wherein the coating composition has improved surface coverage properties and a fast cure rate. The coating composition contains (a) a first component comprising at least one polyol having at least 4 hydroxyl groups and a viscosity at room temperature of 6000 cps or less; and (b) a second component comprising a solvent-free isocyanate prepolymer. The viscosity of the coating composition is 15000 cps or less at room temperature.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: February 7, 1995
    Assignee: The Sherwin-Williams Company
    Inventor: Nien-chu Chiang
  • Patent number: 5387619
    Abstract: A process for inhibiting chemical reactions of a fluid functionally reactive organic material by mixing it with supercritical fluid ("SCF") or near supercritical fluid, especially carbon dioxide maintained under supercritical fluid conditions. The process includes the ability to restrain a chemical reaction that occurs otherwise between functionally compatible organic molecules by the inclusion of supercritical fluid, particularly CO.sub.2, with the molecules, so that the reaction can be made to occur according to a predetermined but different from normal pattern.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: February 7, 1995
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Chinsoo Lee, Kenneth L. Hoy
  • Patent number: 5387665
    Abstract: A resin for electrophotographic toner comprising a degradable polyester resin which is an amorphous poly (.alpha.-hydroxycarboxylic acid) prepared by direct dehydration-polycondensation of an .alpha.-hydroxycarboxylic acid and having, preferably, a number-average molecular weight ranging from 2000 to 7000. A further resin for electrophotographic toner comprising a degradable polyester resin which may be prepared by reacting an amorphous or semicrystalline poly (.alpha.-hydroxycarboxylic acid), having a number-average molecular weight ranging from 1000 to 7000 or 2000 to 7000 and prepared by direct dehydration-polycondensation of an .alpha.-hydroxycarboxylic acid, with a polyol having at least three hydroxyl groups or a polycarboxylic acid having at least three carboxyl groups in the molecule and, in case of the reaction product with the polyol can further be reacted with a diisocyanate to give an urethane-modified polyester. These polyesters can likewise be used as resins for toner.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: February 7, 1995
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Misawa, Masanobu Ajioka
  • Patent number: 5384380
    Abstract: A polymerizable composition is provided which is constituted by adding isocyanate by 0.1 to 2 equivalent to the alcoholic hydroxyl group in a mixture dissolving component A prescribed below by 20 to 60 parts by weight to a total of 80 to 40 parts by weight of component B and component C in the ratio specified below:[Component A]A multifunctional (meth)acrylate possessing at least one alcoholic hydroxyl group, and also possessing at least one aromatic ring replaced by at least one halogen atom other than fluorine or phenyl group, and two or more (meth)acryloyl groups in a molecule:[Component B]A multifunctional (meth)acrylate possessing at least one aromatic ring having neither halogen atom nor phenyl group as substituent, and possessing two or more (meth)acryloyl groups in a molecule, or a mixture of radically polymerizable multifunctional unsaturated monomer including the compound; 5 to 80 wt.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: January 24, 1995
    Assignee: Daiso Co., Ltd.
    Inventors: Hiroyuki Kanesaki, Kouji Uegami, Keishiro Nagao
  • Patent number: 5384362
    Abstract: The invention relates to vinyl sulfonated and non-sulfonated hydroxy functional polyurethane copolymers prepared from macromonomer diols and their use in magnetic recording media. The sulfonated hydroxy functional copolymer comprises: a polyurethane backbone; at least one SO.sub.3 M group pendant from the polyurethane backbone, wherein the polyurethane backbone has an S0.sub.3 M equivalent weight of from about 2,000 to about 100,000, and wherein M is selected from the group consisting of H.sup.+, NR.sub.4.sup.+ wherein R can be H.sup.+ or an alkyl group, Li.sup.+, Na.sup.+, K.sup.+, and mixtures thereof; at least two crosslinkable hydroxy groups pendant from the polyurethane backbone, wherein the polyurethane backbone has a hydroxy equivalent weight of from about 500 to about 50,000; and at least one vinyl polymeric segment B pendant from the polyurethane backbone.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: January 24, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James G. Carlson, Jeffrey T. Anderson
  • Patent number: 5382602
    Abstract: Flexible, slabstock polyurethane foam compositions useful for a rapid-cool process are disclosed. The foams are produced in the presence of a tetravalent tin catalyst, preferably at a relatively low isocyanate index, and preferably with a polyol that contains a non-volatile inhibitor. The foams of the invention eliminate or greatly reduce the amount of visible smoke produced in a rapid-cool process.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: January 17, 1995
    Inventors: Robert D. Duffy, George Combs