Patents Represented by Attorney David L Hedden

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  • Thermosetting inorganic clay nanodispersions and their use
    Patent number: 6887931
    Abstract: This invention relates to thermosetting inorganic clay nanodispersions comprising an inorganic clay treated in situ with an intercalation agent and a non-aqueous, chemically reactive, organic intercalation facilitating agent, wherein the amount of intercalation facilitating agent is sufficient to facilitate intercalation and to disperse said inorganic clay. The thermosetting inorganic clay nanodispersions comprise an inorganic clay dispersed in an intercalating agent and an intercalation facilitating agent. Thermosetting inorganic clay nanodispersions are used to prepare thermosetting nanocomposite articles.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: May 3, 2005
    Assignee: Ashland Inc.
    Inventors: Helena Twardowska, Laurence G. Dammann
  • Polyisocyanate compositions and their use
    Patent number: 6883587
    Abstract: This invention relates to polyisocyanate compositions comprising (a) polyisocyanate, and (b) a monomeric carbodiimide. The polyisocyanate compositions are particularly useful in phenolic urethane foundry binder systems. The invention also relates to foundry mixes prepared with (a) a phenolic urethane binder containing the polyisocyanate composition, and (b) a foundry aggregate, as well as foundry shapes prepared by the no-bake and cold-box processes, which are used to make metal castings.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: April 26, 2005
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Jorg Kroker
  • Process for inhibiting scale
    Patent number: 6858180
    Abstract: This invention relates to a process for scale inhibition using random copolymers of acrylic acid and a monomer that is hydrophobic.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: February 22, 2005
    Assignee: Ashland Inc.
    Inventors: Sridevi Narayan-Sarathy, Laurence G. Dammann, Davor Zidovec
  • Scale inhibitor for an aqueous system
    Patent number: 6846452
    Abstract: This invention relates to a composition and a method for inhibiting the formation of scale, particularly complex scale, in an aqueous system where more than one type of scale is present. The scale typically present in the aqueous system includes silica, silicates, and carbonates. The scale inhibiting composition comprises (1) 2-phosphonobutane-1,2,4-tricarboxylic acid and salts thereof, and (2) a copolymer of (1) one or more allyloxybenzenesulfonate monomers, and (2) one or more water-soluble acrylic monomers, substituted acrylic monomers, or mixtures thereof.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: January 25, 2005
    Assignee: Ashland Inc.
    Inventors: Pavol Kmec, Dwight E. Emerich
  • Thermosetting inorganic clay nanodispersions and their use
    Patent number: 6841607
    Abstract: This invention relates to thermosetting inorganic clay nanodispersions comprising an inorganic clay and at least one organometallic compound. The thermosetting inorganic clay nanodispersions are used to prepare thermosetting articles.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: January 11, 2005
    Assignee: Ashland Inc.
    Inventors: Helena Twardowska-Baxter, Rina Singh, Laurence G. Dammann
  • Process for inhibiting scale and fouling on the metal surfaces exposed to an aqeuous system
    Patent number: 6797177
    Abstract: This invention relates to a process for inhibiting scale and fouling on metal surfaces exposed to an aqueous system, particularly a circulating aqueous system. The process comprises adding glutamic acid N,N diacetic acid, or salts thereof, to the aqueous system. Glutamic acid N,N diacetic acid, or salts thereof, act as a chelating agent and is biodegradable. The process is particularly useful for inhibiting the formation of scale and fouling on metal surfaces of steam generating and cooling systems.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: September 28, 2004
    Assignee: Ashland Inc.
    Inventors: Kostan B. Charkhutian, Bruce L. Libutti, Frank L. M. De Cordt, John S. Ruffini
  • Polyurethane based binder system for the manufacture of foundry cores and molds
    Patent number: 6772820
    Abstract: A cold-box process for preparing a foundry shape, e.g. mold or core, that uses a binder comprising a phenolic resin component and an isocyanate component, wherein the phenolic resin component comprises (a) an alkoxy-modified phenolic resole resin and (b) an oxygen-rich polar, organic solvent component, which contains a fatty acid ester.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: August 10, 2004
    Assignee: Ashland Inc.
    Inventors: Jean-Claude Roze, Günther Weicker, Diether Koch, Andreas Werner
  • Process for digesting woodchips with a sultaine and a polyglycoside
    Patent number: 6740199
    Abstract: The invention relates to a process for digesting woodchips used in papermaking. The process employs digester additive, which comprises a sultaine or mixtures of a sultaine with a nonionic surfactant selected from the group consisting of (a) polyglycosides, (b) polyoxyalkylene glycols, and (c) mixtures thereof as digester additives. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of woodchips into pulp. The invention also relates to the digester additive compositions.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: May 25, 2004
    Assignee: Ashland Inc.
    Inventors: Abdul Q. Khan, George K. Wai
  • Corrosion inhibiting composition
    Patent number: 6723257
    Abstract: This invention relates to a corrosion inhibiting composition for use in commercial, institutional, and industrial water systems. The compositions comprise a mixture of (1) a fatty acid ester, and (2) a polyethylene glycol ester. These compositions are useful in inhibiting the corrosion of metals such as steel, copper, and brass, which are exposed to water.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: April 20, 2004
    Assignee: Ashland Inc.
    Inventors: Bruce L. Libutti, Joseph Mihelic
  • Cold-box foundry binder systems
    Patent number: 6686402
    Abstract: This invention relates to foundry binder systems, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising (a) an epoxy novolac resin; (b) preferably a bisphenol F; (c) an acrylate; and (d) an effective amount of a free radical initiator. The foundry binder systems are used for making foundry mixes. The foundry mixes are used to make foundry shapes (such as cores and molds) which are used to make metal castings.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: February 3, 2004
    Assignee: Ashland Inc.
    Inventors: Wayne D. Woodson, H. Randall Shriver
  • Erosion-resistant cold-box foundry binder systems
    Patent number: 6684936
    Abstract: This invention relates to erosion resistant foundry binder systems, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising (a) an epoxy resin; (b) a multifunctonal acrylate; (c) a phenolic resin that is soluble in (a) and (b); and (d) an effective amount of a free radical initiator. The foundry binder systems are used for making foundry mixes. The foundry mixes are used to make foundry shapes (such as cores and molds) which are used to make metal castings.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: February 3, 2004
    Assignee: Ashland Inc.
    Inventors: Wayne D. Woodson, James J. Archibald, H. Randall Shriver
  • Composition for removing dissolved oxygen from a fluid
    Patent number: 6669853
    Abstract: This invention relates to compositions, which are useful in removing dissolved oxygen from a fluid stream, preferably an aqueous stream. The compositions comprise blend of an oxime and a primary hydroxylamine. This invention also relates to a process for removing oxygen from an aqueous system, which comprises adding an oxime and a primary hydroxylamine to a fluid system.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: December 30, 2003
    Assignee: Ashland Inc.
    Inventors: Kostan B. Charkhutian, Bruce L. Libutti, Frank L. M. De Cordt, Martti Samuli Ahomäki
  • Hydrogenfluorides of aminosilanols and their use
    Patent number: 6664310
    Abstract: This invention relates to hydrogenfluorides of aminosilanols and their use. The hydrogenfluorides of aminosilanols are formed by the reaction of an aqueous solution of a fluorinated acid, preferably, hydrofluoric acid, with an aminoalkoxysilane. The hydrogenfluorides of aminosilanols are particularly useful in foundry binders, most particularly no-bake and cold-box phenolic urethane foundry binders.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: December 16, 2003
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Jorg Kroker, Robert B. Fechter
  • Cold-box foundry binder systems having improved shakeout
    Patent number: 6662854
    Abstract: This invention relates to foundry binder systems, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising (a) an aliphatic epoxy resin; (b) a multifunctional acrylate; and (c) an effective amount of a free radical initiator. The foundry binder systems are used for making foundry mixes. The foundry mixes are used to make foundry shapes (such as cores and molds) which are used to make metal castings, particularly aluminum castings.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: December 16, 2003
    Assignee: Ashland Inc.
    Inventors: Wayne D. Woodson, H. Randall Shriver
  • Process for digesting woodchips and digester additives
    Patent number: 6649023
    Abstract: The invention relates to a process for digesting woodchips used in papermaking. The process employs a digester additive, which is a mixture of (a) a polyglycoside, and (b) a polyoxyalkylene glycol. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of wood chips into pulp. The invention also relates to the digester additive compositions.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: November 18, 2003
    Assignee: Ashland Inc.
    Inventors: George K. Wai, Abdul Q. Khan
  • Control of barium sulfate scaling
    Patent number: 6620328
    Abstract: This invention relates to a method of inhibiting the growth of barium sulfate scaling by using a synergistic blend of (a) a polyphosphate with degree of polymerization between 6 and 21, and (b) a polyphosphate with degree of polymerization of 2-3 in a weight ratio of 3:1 to 1:2. The blend further includes a phosphino-acrylic polymer.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: September 16, 2003
    Assignee: Ashland Inc.
    Inventor: Davor F. Zidovec
  • Corrosion inhibiting composition
    Patent number: 6613249
    Abstract: This invention relates to a corrosion inhibiting composition for use in commercial, institutional, and industrial water systems. The compositions comprise a mixture of (1) a fatty acid ester, and (2) a polyalkylene glycol, preferably polyethylene glycol. These compositions are useful in inhibiting the corrosion of metals such as steel, copper, and brass, which are exposed to water.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: September 2, 2003
    Assignee: Ashland Inc.
    Inventors: Bruce L. Libutti, Joseph Mihelic
  • Free radically cured cold-box binders containing an alkyl silicate
    Patent number: 6604567
    Abstract: This invention relates to foundry binder systems, which will cure in the presence of sulfur dioxide and a free radical initiator, comprising (a) an epoxy resin; (b) an acrylate; (c) an alkyl silicate; and (d) an effective amount of a free radical initiator. The foundry binder systems are used for making foundry mixes. The foundry mixes are used to make foundry shapes (such as cores and molds) which are used to make metal castings, particularly ferrous castings.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: August 12, 2003
    Assignee: Ashland Inc.
    Inventors: Wayne D. Woodson, H. Randall Shriver
  • Polyurethane-forming binders
    Patent number: 6602931
    Abstract: This invention relates to a polyurethane-forming no-bake foundry binder comprising a (a) polyol component comprising (1) a polyol selected from the group consisting of polyether polyols, aminopolyols, polyester polyols, and mixtures thereof, and (2) a hydrogenfluoride of aminosilanol, (b) a polyisocyanate component, and optionally (c) a liquid tertiary amine catalyst component. Foundry mixes are prepared by mixing the binder system with a foundry aggregate by a no-bake process. The resulting foundry shapes are used to cast metal parts from ferrous and non-ferrous metals.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: August 5, 2003
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Jorg Kroker
  • Furan no-bake foundry binders and their use
    Patent number: 6593397
    Abstract: This invention relates to furan no-bake foundry binders comprising (a) furfuryl alcohol and/or a reactive furan resin, (b) an activator selected from the group consisting of resorcinol, resorcinol pitch, and bisphenol A tar (c) a bisphenol compound (d) a polyol selected from the group consisting of polyester polyols, polyether polyols, and mixtures thereof, and preferably (e) a silane. The binders are cured in the presence of the furan curing catalyst. The invention also relates to foundry mixes prepared with the binder, foundry shapes prepared with the foundry mix, and metal castings prepared with the foundry shapes.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: July 15, 2003
    Assignee: Ashland Inc.
    Inventor: Ken K. Chang