Patents Represented by Attorney Richard P. Plunkett

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  • Rigidized open cell polyurethane foam
    Patent number: 4258137
    Abstract: This invention relates to the preparation of a flexible, open cell polyurethane foam which can be rigidized by incorporating an epoxy resin into the mixture prior to foaming and, after forming a flexible foam, adding an epoxy curing agent thereto to cause the epoxy resin to cure thereby rigidizing the previously flexible foam. The flexible foam can be reshaped prior to rigidizing if desired.
    Type: Grant
    Filed: October 11, 1979
    Date of Patent: March 24, 1981
    Assignee: W. R. Grace & Co.
    Inventor: Joseph A. Cogliano
  • Plant growth media utilizing polyurethane hydrogel
    Patent number: 4241537
    Abstract: A plant growth media in the form of a gel which is useful for growing plants in the form of seeds, seedlings, cuttings, nursery stock, etc., is obtained by dissolving a water-soluble polyisocyanate capped prepolymer containing said growing plant in an aqueous medium optionally containing various plant growth additives such as fertilizer, agricultural modified minerals and the like. The media can be formed in a variety of shapes.
    Type: Grant
    Filed: May 10, 1979
    Date of Patent: December 30, 1980
    Assignee: W. R. Grace & Co.
    Inventor: Louis L. Wood
  • Heat stable, non-yellowing photopolymer compositions
    Patent number: 4230740
    Abstract: This invention relates to heat stable, non-yellowing photopolymer compositions comprising a polythiol, a photoinitiator and a polyene of the formula: ##STR1## wherein R are all the same member of the group consisting of ##STR2## R.sub.1 is --CH.sub.3 or R, and R' is --CH.sub.3 or H. The UV cured coating resulting from this composition are non-yellowing even after baking for 15 minutes at 450.degree. F.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: October 28, 1980
    Assignee: W. R. Grace & Co.
    Inventor: Joseph D. Moyer
  • Polyurethane foams and foam forming compositions containing amine scavengers
    Patent number: 4211847
    Abstract: This invention relates to urethane forming compositions and a method of forming polyurethanes having low residual potentially carcinogenic aromatic amines by adding scavengers from the group comprising cyclohexyl monoisothiocyanate and hindered aliphatic monoisocyanates of the general formula: ##STR1## wherein R.sub.1 - R.sub.7 are H, alkyl, cycloalkyl, aryl, alkaryl, aralkyl or mixtures thereof and x is 1 to 7.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: July 8, 1980
    Assignee: W. R. Grace & Co.
    Inventors: Clifton L. Kehr, Louis L. Wood, James L. Guthrie
  • Radiation curable, ethylenically unsaturated thixotropic agent and method of preparation
    Patent number: 4204010
    Abstract: This invention relates to an ethylenically unsaturated reactive thixotropic agent for use in radiation curable compositions, e.g., overprint varnishes, formed by reacting a hydroxyl-containing fatty acid ester with an ethylenically unsaturated isocyanate. The agent not only performs its thixotropic function in the uncured state but also forms part of the cured product on exposure to radiation, e.g., UV radiation due to its substantially similar reactivity.
    Type: Grant
    Filed: December 21, 1978
    Date of Patent: May 20, 1980
    Assignee: W. R. Grace & Co.
    Inventors: David E. Kramm, Arthur D. Ketley
  • Dimensionally stable polyurethane foam
    Patent number: 4201846
    Abstract: The invention disclosed relates to hydrophilic polyurethane foam which exhibits improved tensile and tear properties and reduced shrinkage upon drying as a result of incorporation of substantially hydrophilic reinforcing fibers formed from homopolymers and copolymers of polyvinyl alcohol. The reinforced foams also exhibit reduced swelling upon contact with water.
    Type: Grant
    Filed: November 24, 1978
    Date of Patent: May 6, 1980
    Assignee: W. R. Grace & Co.
    Inventors: Clifton L. Kehr, Louis L. Wood, Nelson S. Marans, Glenn E. Fulmer
  • Process for preparing catalytic solutions of sulfonium salts
    Patent number: 4179400
    Abstract: This invention relates to a process for preparing a catalytic solution of a sulfonium salt of a complex anion, capable of yielding a Lewis Acid when irradiated by UV or high energy ionizing radiation comprising reacting a sulfonium halide with an alkali metal salt of the complex anion in a solvent mixture containing a polyol having at least two hydroxy groups and a lactone.
    Type: Grant
    Filed: January 25, 1979
    Date of Patent: December 18, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Jung-Hsien Tsao, Arthur D. Ketley
  • Removal of unreacted tolylene diisocyanate from urethane prepolymers
    Patent number: 4169175
    Abstract: Disclosed herein are improved urethane prepolymers comprising the reaction product of a polyol with a monomeric isocyanate. The amount of residual unreacted monomeric isocyanate in said prepolymer is less than about 0.7% by weight of said prepolymer.
    Type: Grant
    Filed: October 11, 1977
    Date of Patent: September 25, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Nelson S. Marans, Alfred Gluecksmann
  • Flame retardant urethane and method
    Patent number: 4165411
    Abstract: The invention disclosed relates to a new polyurethane composition having improved flame retardance and to a method for preparing same. The present composition includes a hydrophilic polyurethane having alumina hydrate and a phosphorus containing compound disposed therein.
    Type: Grant
    Filed: September 20, 1977
    Date of Patent: August 21, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Nelson S. Marans, Clifton L. Kehr, Robert M. Murch
  • Simulated natural sponge based on hydrophilic polyurethane
    Patent number: 4160076
    Abstract: The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams which simulate natural sponges and prepared by reacting an isocyanate capped polyoxyethylene polyol reactant with an aqueous reactant and a carefully balanced combination of a nonionic surface-active agent and a liquid defoaming agent. The resultant foams are characterized by a majority of large size cells and membranes which themselves are foamed with small cells.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: July 3, 1979
    Assignee: W. R. Grace & Co.
    Inventors: James L. Guthrie, Donald J. Bach
  • Urethane foams having low resiliency
    Patent number: 4158087
    Abstract: Disclosed herein are hydrophilip polyether urethane foams having reduced resiliency and prepared by reacting a polyoxyalkylene urethane prepolymer containing at least 40 mole percent of oxyethylene units; water; and at least about 50 parts, based on the weight of the prepolymer, of a synthetic polymer latex.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: June 12, 1979
    Assignee: W. R. Grace & Co.
    Inventor: Louis L. Wood
  • Expandable fabric softener-containing article and use thereof
    Patent number: 4156592
    Abstract: Disclosed herein is a fabric softener-containing article comprising a fabric softener impregnated into an open-celled reticulated urethane foam; said impregnated foam being compressed to form a sheet or wafer. The fabric softener also acts as a solid binder which maintains the reticulated urethane foam in compressed form. The compressed sheet-like compositions are especially advantageous in that they are only 1/5 to 1/15 the size of comparable materials containing equivalent loadings of fabric softener. During the laundry wash cycle the water-dispersible fabric softener is released allowing the foam to slowly rebound to substantially its original uncompressed shape.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: May 29, 1979
    Assignee: W. R. Grace & Co.
    Inventor: Louis L. Wood
  • Photocurable epoxy-acrylate compositions
    Patent number: 4156035
    Abstract: This invention relates to radiation curable compositions comprising mixtures of epoxy resin and di- or polyacrylate or methacrylate terminated monomers in combination with a catalyst system comprising a carbonyl type photoinitiator with an aromatic onium salt capable of effecting the cure by release of a Lewis Acid.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: May 22, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Jung-Hsien Tsao, Arthur D. Ketley
  • Process for preparing catalytic solutions of sulfonium salts
    Patent number: 4154872
    Abstract: This invention relates to a process for preparing a catalytic solution of a sulfonium salt of a complex anion, capable of yielding a Lewis Acid when irradiated by UV or high energy ionizing radiation comprising reacting a sulfonium halide with an alkali metal salt of the complex anion in a solvent mixture containing a polyol having at least two hydroxy groups and a lactone.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: May 15, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Jung-Hsien Tsao, Arthur D. Ketley
  • Method of coating with polyenes derived from hydantoin acids, amines and esters
    Patent number: 4150166
    Abstract: This invention is directed to polyenes derived from hydantoin acids, amines and esters. The polyene is typically a reaction product of a hydantoin amine, e.g., N,N'-bis(3-aminopropyl)-dimethylhydantoin, a diisocyanate and an unsaturated ether, e.g., trimethylolpropane diallyl ether. Upon exposure to a free radical generator, e.g., actinic radiation, in combination with a polythiol, this polyene cures to a solid, insoluble, chemically resistant, crosslinked polythioether product having excellent heat stability.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: April 17, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Eckart Mathias, Charles R. Morgan
  • Method of coating with polyenes derived from hydantoin acids, amines and esters
    Patent number: 4150167
    Abstract: This invention is directed to polyenes derived from hydantoin acids, amines and esters. The polyene is typically a reaction product of a hydantoin amine, e.g., N,N'-bis(3-aminopropyl)-dimethylhydantoin, a diisocyanate and an unsaturated ether, e.g., trimethylolpropane diallyl ether. Upon exposure to a free radical generator, e.g., actinic radiation, in combination with a polythiol, this polyene cures to a solid, insoluble, chemically resistant, crosslinked polythioether product having excellent heat stability.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: April 17, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Eckart Mathias, Charles R. Morgan
  • Photocurable epoxy compositions containing thiopyrylium salts
    Patent number: 4139655
    Abstract: This invention relates to photocurable compositions comprising an epoxy resin and a catalytic amount of a photodecomposable thiopyrylium salt of the formula: ##STR1## WHERE R.sub.1, R.sub.2 and R.sub.3 are independently selected from the group consisting of hydrogen, alkyl containing 1 to 10 carbon atoms, cycloalkyl containing 5 to 12 carbon atoms, aryl containing 6 to 12 carbon atoms and substituted derivatives thereof, M is a metal or metalloid, X is a halogen radical, a is a whole number equal to 1 to 10 and n is a whole number equal to 1 to 3.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: February 13, 1979
    Assignee: W. R. Grace & Co.
    Inventor: Jung-Tsien Tsao
  • Crosslinked hydrophilic foams and method
    Patent number: 4137200
    Abstract: The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams prepared by reacting a blend of a monomeric polyol and polyoxyalkylene glycol (the --OH groups of said blend being capped with a polyisocyanate) with large amounts of an aqueous reactant. The resultant foams may be characterized with a broad spectrum of improved properties including hydrolytic stability and tensile strength.
    Type: Grant
    Filed: June 10, 1977
    Date of Patent: January 30, 1979
    Assignee: W. R. Grace & Co.
    Inventors: Louis L. Wood, Kurt C. Frisch
  • Preparation of thioethers using a benzopinacol initiator
    Patent number: 4135047
    Abstract: This invention relates to a process for preparing thioethers by the addition of an SH group from a thiol-containing compound, e.g., an alcohol, ester or acid, across at least one double bond of an ethylenically unsaturated compound in the presence of an initiator comprising a pinacol of the general formula: ##STR1## wherein R is phenyl or substituted phenyl, said substituents being members of the group consisting of halogen, alkyloxy and alkyl, said alkyloxy and alkyl containing 1 to 6 carbon atoms.
    Type: Grant
    Filed: March 23, 1978
    Date of Patent: January 16, 1979
    Assignee: W. R. Grace & Co.
    Inventor: Charles R. Morgan
  • Photocurable imidizable polyene-polythiol compositions
    Patent number: 4132812
    Abstract: This invention relates to polyenes containing at least two ethylenically unsaturated bonds per molecule formed by reacting in substantially stoichiometric amounts, (1) a primary diamine, (2) a member of the group consisting of a benzenoid-containing dianhydride, acid anhydride and anhydride acid halide and (3) an ethylenically unsaturated alcohol. The thus formed amideacid polyene either per se or after being cured in combination with a polythiol in the presence of a free radical generator will, upon heating, imidize.
    Type: Grant
    Filed: November 15, 1977
    Date of Patent: January 2, 1979
    Assignee: W. R. Grace & Co.
    Inventor: Eckart Mathias