Patents Assigned to Flow Polymers, Inc.
  • Desiccant dispersion for rubber compounds
    Patent number: 6534571
    Abstract: A solid calcium oxide desiccant dispersion for use in rubber compounds. The dispersion comprises 30-94 weight percent calcium oxide and 3-55 weight percent asphalt and optionally 0.5-12 weight percent fatty acid agent and 0.5-14 weight percent plasticizer. The dispersion is added to rubber compounds at the rate of 1-20 parts per hundred parts rubber.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: March 18, 2003
    Assignee: Flow Polymers, Inc.
    Inventor: James W. Hoover
  • Coupling agent composition
    Patent number: 6147147
    Abstract: A solid coupling agent for use in a vulcanizable rubber compound containing siliceous filler. The coupling agent includes an organosilane, a powderizing agent, and a fatty acid dispersion aid including fatty acid and a salt-forming agent.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: November 14, 2000
    Assignee: Flow Polymers, Inc.
    Inventors: James W. Hoover, E. Timothy McDonel
  • Non-phenolic rubber tackifier
    Patent number: 6103792
    Abstract: A non-phenolic tackifier compound which includes starch and asphalt, and is substantially free of cross-linked fatty acids. Preferably, the tackifier compound further includes a hydrocarbon tackifying resin, and a binding resin composed of a styrene copolymer, or an ethylene copolymer.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: August 15, 2000
    Assignee: Flow Polymers, Inc.
    Inventors: James W. Hoover, James V. Fusco, Pamela S. MacMillan
  • Method for reducing mold fouling
    Patent number: 6096248
    Abstract: A method of reducing fouling of a mold caused by vulcanization of a rubber compound in the mold. Pursuant to the method, about 0.2-20 phr of a fouling inhibitor composition comprising starch is added to the rubber compound before the rubber compound is vulcanized in the mold. The fouling inhibitor composition is substantially free of cross-linked fatty acids, asphalt, tackifying resins, and synthetic plasticizers. More molding cycles can be run before the mold is cleaned.
    Type: Grant
    Filed: August 11, 1999
    Date of Patent: August 1, 2000
    Assignee: Flow Polymers, Inc.
    Inventors: Cameron R. Fraser, James W. Hoover
  • Zinc oxide dispersion
    Patent number: 6046260
    Abstract: A zinc oxide dispersion for use in rubber compounds having at least 40, preferably 74-92, weight percent zinc oxide powder and at least five weight percent of a binder selected from the group consisting of asphalt and terpene tackifiers. The dispersion also preferably includes at least 0.5 weight percent stearifying agent such as stearic acid.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: April 4, 2000
    Assignee: Flow Polymers, Inc.
    Inventor: James W. Hoover
  • Latex rubber additive and latex rubber compounds
    Patent number: 5877244
    Abstract: An additive for latex rubber compounds is provided, the additive comprising crosslinked fatty acid and preferably lightweight microcellular filler, preferably expanded perlite. The additive is prepared as an aqueous emulsion and increases tear resistance in latex rubber compounds.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: March 2, 1999
    Assignee: Flow Polymers, Inc.
    Inventors: James W. Hoover, Maurice E. Wheeler, James V. Fusco, Harvey L. Kaufman
  • Rubber additive and rubber compounds
    Patent number: 5650454
    Abstract: A rubber additive is provided, which comprises crosslinked fatty acid and starch, and preferably further comprises a carrier, preferably an asphalt carrier. The rubber additive increases tear resistance when added to a rubber compound.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: July 22, 1997
    Assignee: Flow Polymers, Inc.
    Inventors: James W. Hoover, Maurice E. Wheeler, James V. Fusco, Harvey L. Kaufman