Patents Represented by Attorney, Agent or Law Firm Valerie E. Looper
  • Patent number: 5135569
    Abstract: Provided is an ink composition which comprises a fluorescent dye. The ink composition is useful in tagging for subsequent identification various articles having a polymeric or porous organic or inorganic surface. The ink composition comprises a non-fluorescent ink such as a black ink, a fluorescent dye, and a solvent for the fluorescent dye, which solvent swells and impregnates the surface of the article thereby permitting impregnation of the article by the fluorescent dye. The resulting tagged article has a printed surface with a fluorescent dye impregnated within the article directly beneath the printing on the surface. Identification of the article can then take place by removing printed material, and subjecting the article to UV irradiation. Observing a bright fluorescent color characteristic of the fluorescent dye used confirms the authenticity of the article.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: August 4, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Eckart Mathias
  • Patent number: 5130200
    Abstract: Poly(vinyl chloride) plastisol compositions modified with epoxy and acid anhydrides can be painted wet-on-wet with acid catalyzed, high solids enamel paints, followed by curing at 120.degree. C. or lower, to give strongly adherent products on electrodeposition coatings and dry, tack-free painted surface. The compositions are also stabilized by the addition of an imide, which provides storage stability at 40.degree. C. for more than three days.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: July 14, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Truc-Chi Huynh-Tran
  • Patent number: 5130205
    Abstract: A polyol is reacted with a polyisocyanate prepolymer to make a polyurethane. The polyol is the reaction product of trimethylol propane with ethylene oxide (1:3 molar). The polyisocyanate prepolymer is the reaction product of poly(ethylene adipate) with MDI. The novel polyurethane is stable in both aliphatic and aromatic hydrocarbons and is especially useful in bonding together laminates of nylon-supported permeable membranes. The laminates are used in modules for separation of hydrocarbon-containing gases.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: July 14, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Cung Vu, Jalandar Y. Jadhav
  • Patent number: 5110769
    Abstract: An improved flatting agent comprising an inorganic hydrogel having a pore volume of at least 1.0 ml/g, an average particle size in the range 1 to 10 microns, and a particle size distribution such thatt when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale. The inorganic hydrogel flatting agents of this invention are prepared by milling an inorganic hydrogel under controlled temperature conditions wherein a volatiles content of at least 40 weight percnet is maintained, to produce inorganic hydrogel particles characterized by a pore volume of at least 1.0 ml/g, an average particle size in the range of 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale.
    Type: Grant
    Filed: October 26, 1990
    Date of Patent: May 5, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: William A. Welsh, Stephen R. Schmidt
  • Patent number: 5104909
    Abstract: A water absorbent, relatively dimensionally stable foam is formed from a prepolymer prepared from a polyoxyethylene containing diol, a crosslinking agent and a polyisocyanate. The preferred polyisocyanate is methylene bis(cyclohexyl isocyanate). The foam also demonstrates the ability to hold substantial amounts of water, even under pressure, and can be used in various personal and medical care products such as diapers and surgical sponges.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: April 14, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Timothy G. Grasel, James L. Guthrie
  • Patent number: 5102969
    Abstract: In a method for the production of a sealing and adhesive strip, particularly for the direct glazing of motor vheicles, using a moisture-hardening single-component polyurethane composition based on telechelic isocyanate prepolymers of aromatic diisocyanates in stoichiometric excess and polyols a composition is employed comprising a) a catalyst for the moisture-hardening and b) a blocked activatable cross-linking agent, and a solvent or solvent mixture is continually injected into the inside of the strip during the extrusion of the strip which liberate the cross-linking agent.For the implementation of the method an extrusion nozzle for the sealing and adhesive strip is used which comprises an injection needle for the solvent opening into the nozzle, the exit opening of which points in the extrusion direction and is located in the region of the center axis of the extrusion die forming the strip.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: April 7, 1992
    Assignee: Teroson G.m.b.H.
    Inventors: Ingolf Scheffler, Michael Hirthammer, Anton M. Schleicher, Jean-Willem Delbeck
  • Patent number: 5096934
    Abstract: Packaging materials containing inherently antistatic foams and a method of using the foams are disclosed. The foam used is a polyether polyurethane foam prepared from an isocyanate containing prepolymer which is the reaction product of a oxyethylene containing polyol and a polyisocyanate. The foams show surface resistivity of less than 1.times.10.sup.12 ohms/square and static decay times of about two seconds or less. A preferred foam shows static decay times of 0.1 seconds or less. The packaging includes articles used around static sensitive devices or used to store or transport static sensitive devices.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: March 17, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: William P. Roberts, Cynthia L. Ebner, Timothy G. Grasel
  • Patent number: 5096468
    Abstract: High performance cellulose acetate butyrate gas separation membranes are prepared from a casting solution containing from about 10 to 30 percent polymer, 35 to 70 percent solvent, and 15 to 30 percent pore-forming agents. A film casting solution is cast onto a substantially flat support surface and a dense layer is formed on the exposed film surface. The film is gelled, washed, and dried to produce a particularly useful gas separation membrane. The cellulose acetate polymers used in this preparation have molecular weights of at least about 20,000, and have about 10 to about 45% butyryl groups, about 2 to about 35% acetyl groups, and about 0.8 to about 2 percent hydroxyl groups, by weight. The membranes may be used for separating a feed gas into a permeate fraction and a residual fraction, and are particularly useful for separating gases in the purge gas stream of ammonia plants to recover a permeate which is relatively rich in hydrogen.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: March 17, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Bhupender S. Minhas
  • Patent number: 5088576
    Abstract: A mass and spring system for soundproofing, particularly in vehicles, comprises a bending-soft heavy plastic layer as the mass and a soft layer as the spring, which is applied to the sound radiating surface or wall and which is a gel of 10 to 50% by weight of an organic polymer or silicone polymer and 50 to 90% by weight of a plasticizer compatible therewith, which at room temperature has a modulus of elasticity E'.ltoreq.5.times.10.sup.5 Pa and an internal loss factor d.gtoreq.0.5.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: February 18, 1992
    Assignee: E.A.P. Akustik GmbH
    Inventors: Hans-Hermann Potthoff, Ingolf Scheffler, Klaus Ruch, Rainer Joesel
  • Patent number: 5084532
    Abstract: A reactive hot-melt adhesive is described, which contains a resin component, at least one thermally activatable latent curing agent for the resin component and optionally accelerators, fillers, thixotropic agents and further conventional additives. The adhesive is characterized in that the resin component is obtainable by reacting a) an epoxy resin solid at room temperature and b) an epoxy resin liquid at room temperature with c) a linear polyoxypropylene having amino terminal groups, in which the epoxy resins a) and b) are used in such a quantity, based on the polyoxypropylene with amino terminal groups, that an excess of epoxy groups, based on the amino groups, is ensured.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: January 28, 1992
    Assignee: Teroson GmbH
    Inventor: Hubert Schenkel
  • Patent number: 5067970
    Abstract: An asymmetric membrane and a method for its preparation is disclosed. The membrane is suitable for gas separation, reverse osmosis and pervaporation applications and is characterized in that it is based on a fully imidized 5(6)-amino-1-(4'-aminophenyl)-1,3-trimethylindane polymer having pore diameters of less than 20 .ANG. units, CO.sub.2 /CH.sub.4 selectivity of at least 20 and CO.sub.2 permeability of at least 1.0 SCFH/ft.sup.2 at 100 p.s.i.
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: November 26, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: I-Fan Wang, Bhupender S. Minhas
  • Patent number: 5064494
    Abstract: For the at least partial curing of sealants and adhesives in particular in connection with the direct glazing of motor vehicles, at least part of the sealant and adhesive is heated by applying microwave energy.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: November 12, 1991
    Assignee: Teroson G.m.b.H.
    Inventors: Edward W. Duck, Ingolf Scheffler, Michael Hirthammer
  • Patent number: 5042992
    Abstract: A novel class of polyimides useful in making semipermeable membranes for gas separation is synthesized by the reaction of 4,4'-[hexafluoroisopropylidene]-bis-[phthalic anhydride] (6FDA) with 3,7-diamino-2,8-dimethyldiphenylenesulfone (AMPS). In lieu of the two methyl groups the diamine may be substituted by H or C.sub.2-4 alkyl. Membranes made from the polyimides have high permeability for CO.sub.2 from mixtures containing CO.sub.2 and other gases such as CH.sub.4 and have commercially acceptable selectivity.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: August 27, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Thomas A. Blinka, Hiroshi Itatani, I-Fan Wang
  • Patent number: 4997354
    Abstract: The invention apparatus comprises a duct that supplies balls to a lateral outlet tube. The outlet tube feeds laterally to a sealant applicator nozzle. An impact plunger pushes the balls successively into sealant in the applicator nozzle. The nozzle extrudes sealant containing balls as spacers, useful in bonding two flat elements, spaced apart by the balls.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: March 5, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Jean-William Delbeck, Anton M. Schleicher
  • Patent number: 4963266
    Abstract: Disclosed are semipermeable fluid separation membranes prepared from polyaromatic polymers including aromatic repeat units of which at least five mole percent are substituted by moieties having ethylenically unsaturated carbon bonds wherein the polymer is crosslinked through carbon bonds between the ethylenically unsaturated moieties. The invented membranes have enhanced durability yet retain very high fluid, especially gas, permeability.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: October 16, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Charles R. Morgan, Cheng-Chi Chen, Thomas A. Blinka, Alan S. Obligin