Patents Examined by Maurice J. Welsh
  • Moisture-curing, hot-melt polyurethane adhesive compositions
    Patent number: 5266606
    Abstract: A moisture-curing hot-melt polyurethane adhesive foam comprising isocyanate-terminated polyurethane prepolymers based on polyester or polyether and having a melting point of 40.degree. to 60.degree. C. or a glass transition point above room temperature, melted together, optionally with a nucleating agent and/or a surfactant, treated with an inert gas under pressure and released in ambient pressure is allowed to cure as a foam whereby a cure rate is achieved of at least ten times that of the composition when not foamed; extremely rapid cure rates are achieved and thick bond lines are readily obtained.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: November 30, 1993
    Assignee: Bostik, Inc.
    Inventors: Heinz G. Gilch, Walter Rath, Karsten Seitz
  • Softening non-swelling polyurethane
    Patent number: 5266669
    Abstract: A non-yellowing, elastomeric polyurethane is made from a non-aromatic diisocyanate, a diol chain extender, a polyglycol and an aminodiol chain extender. The polyurethane is stable to sterilizing radiation, is made without any processing aids or toxic catalysts, and softens without swelling up to 95% when contacted with an aqueous liquid.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: November 30, 1993
    Assignee: Becton, Dickinson and Company
    Inventors: Theophilus O. Onwunaka, James M. Lambert
  • Integral skin rigid polyurethane structural foam
    Patent number: 5264461
    Abstract: The invention relates to rigid integral skin polyurethane structural foam having high impact strength, high heat distortion, and flame retardant properties. The foam is prepared from triisopropanolamine-initiated polyoxyalkylene (TIPA) polyether polyols oxyalkylated with a compound producing primary hydroxyl functional termination. The polyether polyol is advantageously of a molecular weight sufficient to enable TIPA to flow well while retaining its flame retardant characteristics in the foam.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: November 23, 1993
    Assignee: BASF Corporation
    Inventor: David C. Krueger
  • Two-component polyurethane sealants, and a mixing method therefor
    Patent number: 5264486
    Abstract: 2-component polyurethane sealants for the direct glazing of motor vehicles, comprising (A) a pasty polyurethane component containing a polyurethane prepolymer having free isocyanate groups, and a curing agent, and (B) a pasty solvent-containing component, where component (A) contains at least one latent, solvent-activatable curing agent which can be activated by means of solvents, and component (B) contains a polar, aprotic solvent and water reversibly bonded to a carrier substance which liberates the water in a delayed manner after components (A) and (B) have been mixed.
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: November 23, 1993
    Assignee: Bostik, Inc.
    Inventor: Gerhard Piestert
  • Composites having a dimensionally stable water-blown polyurethane foam by employing lithium salts for cooling containers
    Patent number: 5262447
    Abstract: A water-blown polyurethane foam is provided between two substrates in foamed-in-place applications such as cooling containers. The water-blown polyurethane foam is made dimensionally stable at low densities by adding lithium salts of a 2 to 24 carbon atom carboxylic acid to the polyol component. The dimensional stability of the foam at the low densities further results in raw material savings.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: November 16, 1993
    Assignee: BASF Corporation
    Inventor: John R. Tucker
  • Porous plastic film product, useful as a breathable wall covering or filters
    Patent number: 5262444
    Abstract: The invention relates to a breathable, plastic film, useful as a wall covering material. A low boiling additive, such as water, is added to a plastisol before extrusion. During extrusion and curing of the plastisol into a film or coating, the low boiling additive is volatilized and the resulting evolved gas perforates the forming film. In this manner a permeable plastic film, such as vinyl, is produced.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: November 16, 1993
    Assignee: Borden, Inc.
    Inventors: George Rusincovitch, Paul J. Roe, Richard C. Andrews
  • Coating composition
    Patent number: 5260361
    Abstract: Disclosed is a coating composition comprising (A) 10 to 70 parts by weight of a poly(meth)acrylate of mono- or polypentaerythritol, (B) 5 to 50 parts by weight of a urethane poly(meth)acrylate having at least two unsaturated double bonds in the molecule, (C) 5 to 50 parts by weight of a poly[(meth)acryloyloxyalkyl] (iso)cyanurate, (D) 2 to 30 parts by weight of an ultraviolet absorber, (E) 0.1 to 10 parts by weight of a photopolymerization initiator, and (F) 0.1 to 5 parts by weight of a hindered amine type light stabilizer, provided that the combined amount of components (A) to (F) is 100 parts by weight. This coating composition can form a crosslinked and cured film having excellent abrasion resistance, surface smoothness, thermal resistance, chemical resistance, durability, weather resistance and adhesion to the substrate.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: November 9, 1993
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroshi Fukushima, Misao Tamura, Osamu Takemoto, Takaji Kawaguchi
  • Polyurethane coating composition
    Patent number: 5260358
    Abstract: A two-package polyurethane coating system is provided which consists of a paint component comprising an OH-containing film-forming resin, such as a polyacrylate polyol or an alkyd resin, and a thinner-curing agent component which is a solution, adjusted to insure a predetermined final application viscosity of the coating, of trimerized isophorone diisocyanate which functions as a curing agent for the resin in an active hydrogen-free organic solvent which functions as a thinner, the two components being supplied in independent cans for mixing and application at a coating site without need for viscosity adjustment.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: November 9, 1993
    Assignee: Isamu Paint Co., Ltd.
    Inventors: Hiroshi Shimizu, Mitsuru Nakagawa, Uhei Hirose
  • Reaction system for preparing polyurethane/polyurea
    Patent number: 5260346
    Abstract: Reaction system for preparing elastomers according to the RIM process, the system comprising an allophanate modified polyisocyanate, a polyol and an aromatic polyamine chain extender. No IMR is necessary.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: November 9, 1993
    Assignee: Imperial Chemical Industries PLC
    Inventors: Edward F. Cassidy, Eric Huygens, Jan W. Leenslag
  • Multifunctional water-dispersible crosslinking agents
    Patent number: 5258481
    Abstract: The invention describes a new type of multi-functional water-dispersible crosslinking agents. These crosslinking agents are products consisting of oligomeric compounds containing carbodiimide functions and other reactive functional groups. Further the invention describes aqueous dispersions, emulsions or solutions with such crosslinking agents. Finally the invention comprises a process for the preparation of the crosslinking agent according to the invention.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: November 2, 1993
    Assignee: Stahl Holland B. V.
    Inventors: Laurentius C. J. Hesselmans, Johanna A. M. van den Goorbergh
  • Low viscosity polymeric MDI
    Patent number: 5258417
    Abstract: The present invention deals with a polymethylene polyphenylisocyanate blend having a viscosity range of from 15 to 37 cps at 25.degree. C. Specifically, the blend is prepared by mixing a polymethylene polyphenylisocyanate with monomeric diphenylmethane diisocyanate. The unique characteristics of this product are that it displays good storage stability under ambient conditions and has a low viscosity. It is useful in the production of polyurethane foams and adhesives.
    Type: Grant
    Filed: December 28, 1992
    Date of Patent: November 2, 1993
    Assignee: BASF Corporation
    Inventor: Thirumurti Narayan
  • Abrasive propellant for cleaning of surfaces and machinery
    Patent number: 5256703
    Abstract: Particles of abrasives such as Garnet, Staurolite or Wollastonite bound to polymer are used as propellant particles to remove undesired materials from surfaces such as floors, walls, ceilings, machinery etc. For example, soil, paint, oil, grease etc. can be thereby removed.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: October 26, 1993
    Assignee: Sponge Jet Inc.
    Inventors: Paul F. Hermann, William R. Lynn
  • Nitrile derivative for sand control
    Patent number: 5256729
    Abstract: A composition and method for consolidating proppant or gravel for propping fractures about, or for gravel packs for sand control in, wells in subterranean formations characterized by an improvement in which there is used a combination of reactants, including a capped diisocyanate that will produce polyurethane and coat the catalyst in situ. Also disclosed are specific examples of satisfactory frac fluids, diluents and catalysts for both a specially designed one-pass system and, preferably, a two-pass system of putting and consolidating the proppant in a fracture.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: October 26, 1993
    Assignee: Atlantic Richfield Company
    Inventors: Helmuth Kutta, Robin Wiser-Halladay
  • Method of producing conductive polymers in microemulsions
    Patent number: 5256730
    Abstract: Methods for preparing highly conductive polymers in water-in-oil microemulsions are disclosed. The invention is particularly useful for preparing conductive polyaniline in the forms of fine particles, membrane composites and coatings on electrodes. The composites and the coatings of the polyaniline have been shown to exhibit conductivities in the range of 150-400 S cm.sup.-1.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: October 26, 1993
    Assignee: National University of Singapore
    Inventors: Leong-Ming Gan, Hardy S. O. Chan, Chwee-Har Chew, Liren Ma
  • Polyurethane RIM elastomers obtained with hydroxyl-containing organotin catalysts
    Patent number: 5256704
    Abstract: The invention relates to reaction injection molded elastomers derived from high molecular weight polyether polyols, an aromatic diamine chain extender, a polyisocyanate and a hydroxyl-containing organotin catalyst. The reaction injection molded (RIM) elastomers of this invention are useful, for example, as automobile body parts.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: October 26, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John E. Dewhurst, James D. Nichols
  • Polyurethane films and their use for bonding
    Patent number: 5254641
    Abstract: Films of thermoplastic polyurethanes (TPU) with a Shore hardness of 75 A to 92 A having 5 to 20% by weight of polyether amide block copolymers and/or polyether ester block copolymers, and their use for adhering to other substrates, particularly for back-foaming with polyurethane foam. The invention also relates to the use of an addition of 5 to 20% by weight of polyether amide block copolymers and/or polyether ester block copolymers to thermoplastic polyurethanes with Shore hardnesses of 75 A to 92 A, based on the weight of the thermoplastic polyurethanes, for decreasing the adhesion and/or interlocking of thermoplastic polyurethanes produced by single layer blown extrusion technique.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: October 19, 1993
    Assignee: Elf Atochem Deutschland, GmbH
    Inventors: Patrick Alex, Andre Piard, Eduard de Jong
  • Polyisocyanate solutions useful for impregnating porous inorganic substrates
    Patent number: 5254660
    Abstract: Solutions of a) a fluorine-containing polyisocyanate in b) an isocyanate-inert solvent are used to impart water, oil and dirt resistance to porous inorganic substrates impregnated therewith. The fluorine-containing polyisocyanate is preferably selected from fluorine-containing polyisocyanates having a fluorine content in the form of perfluorinated alkyl groups of from about 15 to about 60% by weight and an isocyanate content of from about 0.5 to about 15% by weight. These isocyanates are obtained by reaction of (cyclo)aliphatic isocyanates with fluorine-containing mono- and polyhydric alcohols, and selected fluorine-containing alcohols suitable for the production of these polyisocyanates.
    Type: Grant
    Filed: November 2, 1992
    Date of Patent: October 19, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stephan Kirchmeyer, Hanns-Peter Muller, Hermann Kober, Stefan Bohm, Josef Pedain
  • Plastic moldings made of water-expanded polymer resin
    Patent number: 5254599
    Abstract: To arrive at an economical method of producing water-expanded polymer resin moldings, it is proposed that a monomer component and a cross-linker on an acrylate basis and/or a PMMA prepolymer be used as resin-forming components of a curable mixture, with the weight ratio of the water component to the resin-forming component being at least 1:1.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: October 19, 1993
    Assignee: Schock & Co. GmbH
    Inventor: Lothar Frank, deceased
  • Water dispersable urethane acrylate oligomer
    Patent number: 5254611
    Abstract: Urethane oligomers having the formula:H.sub.2 C:CHCOORO[[COHNR'NHCO[O[CH.sub.2 ].sub.t CCH.sub.3 X].sub.m O].sub.n [CONHR'NHCOYR"Y].sub.p ].sub.q CONHR'NHCOOROCOCH:CH.sub.2(I)as well as process therefor are described. These oligomers are photocurable and useful as coatings and ink.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: October 19, 1993
    Assignee: Henkel Corporation
    Inventor: Michael D. McDermott
  • Process for the preparation of conductive polymer blends
    Patent number: 5254633
    Abstract: This invention relates to a process for forming polyaniline films or coatings on a substrate and to composite articles formed by said process.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: October 19, 1993
    Assignee: Allied Signal Inc.
    Inventors: Chien-Chung Han, Ronald L. Elsenbaumer