Patents Represented by Attorney David L Hedden

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  • Amine curable foundry binder system
    Patent number: 6342543
    Abstract: The subject invention relates to a foundry binder system that cures in the presence of a volatile amine curing catalyst. The binder system comprises (a) a compound containing at least two active methylene hydrogen atoms, (b) an organic polyisocyanate (c) a reactive unsaturated acrylic monomer and/or polymer, (d) an oxidizing agent, and preferably (e) an epoxy component. The foundry binders are used for making foundry mixes. The foundry mixes are used to make foundry shapes that are used to make metal castings.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: January 29, 2002
    Assignee: Ashland Inc.
    Inventors: Thomas M. Moy, Raymond Scott Harvey, Edward G. Toplikar, Gary M. Carlson, Don Greg Hendershot
  • Process for dispersing iron oxide in steam generating boilers
    Patent number: 6337047
    Abstract: This invention relates to a process for dispersing corrosion products, specifically iron oxide, in steam generating boilers. Improved dispersion is achieved by adding a dispersant to a feedpoint of the steam generating boiler where the composition comprises: (a) a copolymer of sulfonated styrene and maleic anhydride or maleic acid; and (b) diethylenetriamine penta (methylene phosphonic acid).
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 8, 2002
    Assignee: Ashland Inc.
    Inventors: Kostan B. Charkhutian, Bruce L. Libutti, Kaj D. Rondum
  • Insulating sleeve compositions containing fine silica and their use
    Patent number: 6335387
    Abstract: This invention relates to insulating sleeve compositions comprising (1) a major amount of hollow aluminosilicate microspheres, and (2) fine silica. The sleeve compositions are used to form sleeve mixes by mixing them with a chemically reactive binder. Sleeves are formed from the sleeve mix and are cured in the presence of a catalyst by the cold-box or no-bake cuing process. The invention also relates to a process for casting metal parts using a casting assembly where the sleeves are a component of the casting assembly. Additionally, the invention relates to the metal parts produced by the casting process.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: January 1, 2002
    Assignee: Ashland Inc.
    Inventors: Helena Twardowska, Ronald C. Aufderheide
  • Solventless polyurethane no-brake foundry binder
    Patent number: 6291550
    Abstract: This invention relates to a solventless polyurethane no-bake foundry binder system comprising, as individual components (a) a polyol component comprising a polyether polyol, glycol, and an aromatic polyester polyol, (b) an organic polyisocyanate component, and (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: March 3, 2000
    Date of Patent: September 18, 2001
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Ken K. Chang
  • Sleeve mixes containing stabilized microspheres and their use in making riser sleeves
    Patent number: 6286585
    Abstract: This invention relates to exothermic and insulating sleeve mixes comprising (1) a sleeve composition comprising stabilized hollow aluminosilicate microspheres, and (2) a chemically reactive binder. Sleeves are formed from the sleeve mix and are cured in the presence of a catalyst by the cold-box or no-bake curing process. The invention also relates to a process for casting metal parts using a casting assembly where the sleeves are a component of the casting assembly. Additionally, the invention relates to the metal parts produced by the casting process.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: September 11, 2001
    Assignee: Ashland Inc.
    Inventors: Helena Twardowska, Ronald C. Aufderheide
  • Foundry binder system containing an ortho ester and their use
    Patent number: 6288139
    Abstract: This invention relates to polyurethane-forming foundry binder systems comprising a phenolic resin component and a polyisocyanate component, where the polyisocyanate component contains an ortho ester. The invention also relates to foundry mixes prepared from the binder and an aggregate, as well as foundry shapes prepared by the no-bake and cold-box processes. The foundry shapes are used to make metal castings.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: September 11, 2001
    Assignee: Ashland Inc.
    Inventor: Michael J. Skoglund
  • Sleeves, their preparation, and use
    Patent number: 6271284
    Abstract: The subject invention relates to a foundry binder system which cures in the presence of a volatile amine curing catalyst comprising (a) an epoxy resin,(b) an organic polyisocyanate, (c) a reactive unsaturated acrylic monomer or polymer, and (d) an oxidizing agent. The foundry binders are used for making foundry mixes. The foundry mixes are used to make foundry shapes which are used to make metal castings.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: August 7, 2001
    Assignee: Ashland Inc.
    Inventors: James J. Archibald, Matthew S. Sheridan
  • Scale and/or corrosion inhibiting composition
    Patent number: 6207079
    Abstract: This invention relates to a scale inhibiting composition for aqueous systems comprising (a) polyaspartic acid, and (b) a water soluble phosphonated oligomer. The compositions are effective scale and/or corrosion inhibitors, but are also advantageous from an environmental standpoint because they are non-toxic, contain no heavy metals, and have little or no phosphorus. They also have sufficient calcium/hardness tolerance, are chlorine/bromine stable, and are effective corrosion inhibitors.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: March 27, 2001
    Assignee: Ashland Inc.
    Inventors: Pavol Kmec, Dwight E. Emerich
  • Liquid metal cleaner for aqueous system
    Patent number: 6156129
    Abstract: The invention relates to a composition useful for cleaning metal surfaces immersed in an aqueous system. The composition comprises as a mixture: an organic carboxylic acid; a non chelating amine; a chelating agent; and preferably a sulfur-containing polymer.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: December 5, 2000
    Assignee: Ashland Inc.
    Inventors: Linda M. Hlivka, Joseph Mihelic, Bruce L. Libutti
  • Sleeves, their preparation, and use
    Patent number: 6133340
    Abstract: This invention relates to exothermic and/or insulating sleeves, their method of preparation, and their use. The sleeves are prepared by shaping a sleeve mix comprising (1) a sleeve composition capable of providing a sleeve, and (2) a chemical binder. The sleeves are cured in the presence of a catalyst by the cold-box or no-bake curing process. The invention also relates to a process for casting metal parts using a casting assembly where the sleeves are a component of the casting assembly. Additionally, the invention relates to the metal parts produced by the casting process.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: October 17, 2000
    Assignee: Ashland Inc.
    Inventor: Paulo Roberto Menon
  • Foundry binder systems which contain alcohol modified polyisocyanates
    Patent number: 6124375
    Abstract: The invention relates to foundry binder systems which use modified polyisocyanates. The modified polyisocyanates are prepared by reacting a polyisocyanate with an aliphatic alcohol having one active hydrogen atom. These modified polyisocyanates, along with a phenolic resole resin, are added to a foundry aggregate to form a foundry mix which is shaped and cured with a gaseous amine curing catalyst.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: September 26, 2000
    Assignee: Ashland Inc.
    Inventors: Rina Singh, Laurence G. Dammann
  • Process for inhibiting the settlement of post-veliger zebra mussels
    Patent number: 6106730
    Abstract: This invention relates to an intermittent process for inhibiting the settlement of zebra mussels in the post-veliger state in addition to providing infestation control of zebra mussels in the veliger state. The process comprises (a) connecting a chlorine dioxide generator to an entry means, such as a water intake pipe or reservoir, of a flowing aqueous system containing a population of zebra mussel veligers and post-veligers, (b) pumping specified amounts of chlorine dioxide into said aqueous system.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: August 22, 2000
    Assignee: Ashland Inc.
    Inventors: Scott G. Freymark, Lawrence C. Hale
  • Foam control agent for paints and coatings
    Patent number: 6090857
    Abstract: This invention relates to a foam control agent which comprises the reaction product prepared by reacting: (a) a hydrocarbon carrier; (b) a precipitated amorphous silicate; (c) a refractory clay; and (d) a reactive silicone in the presence of a catalytically effective amount of a basic catalyst at elevated temperatures.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: July 18, 2000
    Assignee: Ashland Inc.
    Inventors: Jeffrey Todd Tamburrino, Andrew Anthony Romano
  • Solventless polyurethane no-bake foundry binder
    Patent number: 6063833
    Abstract: This invention relates to a solventless polyurethane no-bake foundry binder system comprising, as individual components (a) a polyol component comprising a polyether polyol, glycol, and an aromatic polyester polyol, (b) an organic polyisocyanate component, and (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: January 8, 1999
    Date of Patent: May 16, 2000
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Ken K. Chang
  • Pitch control composition based on blend of derivatized cationic guar and styrene maleic anhydride copolymer
    Patent number: 6051160
    Abstract: This invention relates to a liquid composition for the control of pitch deposition in pulp and paper making comprising an aqueous solution of (1) a derivatized cationic guar, and (2) styrene maleic anhydride copolymer. The invention also relates to a process for inhibiting pitch deposition in pulp and papermaking systems and on papermaking equipment.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: April 18, 2000
    Assignee: Ashland Inc.
    Inventors: Linda M. Hlivka, George K. Wai
  • Amine cured foundry binder systems and their uses
    Patent number: 6037389
    Abstract: The subject invention relates to a foundry binder system which cures in the presence of a volatile amine curing catalyst comprising (a) an epoxy resin,(b) an organic polyisocyanate, (c) a reactive unsaturated acrylic monomer or polymer, and (d) an oxidizing agent. The foundry binders are used for making foundry mixes. The foundry mixes are used to make foundry shapes which are used to make metal castings.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: March 14, 2000
    Assignee: Ashland Inc.
    Inventors: James J. Archibald, Matthew S. Sheridan
  • Polyurethane forming no-bake foundry binders
    Patent number: 6017978
    Abstract: This invention relates to a polyurethane no-bake foundry binder comprising (1) phenolic resin component which comprises (a) a phenolic resin, (b) hydrofluoric acid, and (c) a silane, and (2) an organic polyisocyanate component, and (3) a liquid tertiary amine catalyst component. The binders are used to prepare foundry mixes by mixing the binder with a foundry aggregate. Foundry shapes are prepared with the mixes by the no-bake process and are used to cast metal parts.
    Type: Grant
    Filed: February 28, 1998
    Date of Patent: January 25, 2000
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Ken K. Chang, Albert Leonard Haugse, Thomas E. Dando
  • Foundry binders containing modified polyisocyanates
    Patent number: 6013695
    Abstract: The invention relates to foundry binder systems which contain modified polyisocyanates. The modified polyisocyanates are prepared by reacting a polyisocyanate with a triglyceride of ricinoleic acid. These modified polyisocyanates a phenolic resole resin are mixed with a foundry aggregate to form a foundry mix which is shaped and cured with an amine curing catalyst.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: January 11, 2000
    Assignee: Ashland Inc.
    Inventors: Michael Jeffrey Skoglund, Jeffery Dale Ungerer
  • No-bake foundry mixes and their uses
    Patent number: 6005021
    Abstract: This invention relates to polyurethane-forming foundry binder systems and foundry mixes which comprise a foundry aggregate, said foundry binder system, and a liquid amine curing catalyst. The binder system comprises a polyol component containing a polyether polyol and a monomeric glycol, and an organic polyisocyanate component. The foundry mixes are used to prepare foundry shapes made from foundry mixes by a no-bake process.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: December 21, 1999
    Assignee: Ashland Inc.
    Inventors: Chia-hung Chen, Thomas E. Dando
  • Insulating sleeve compositions and their uses
    Patent number: 5983984
    Abstract: Insulating sleeve mixes that contain hollow aluminosilicate microspheres, an organic binder, and boric acid and/or a phosphate, and their uses.
    Type: Grant
    Filed: January 12, 1998
    Date of Patent: November 16, 1999
    Assignee: Ashland Inc.
    Inventors: Ronald C. Auderheide, Helena Twardowska, Ralph E. Showman