Patents by Inventor Ahti Koski

Ahti Koski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for hydrophobicizing particles, and their use as fillers in polymer masterbatches
    Patent number: 6420456
    Abstract: Particles are hydrophobicized by treatment with a compound containing amino and silane groups, followed by treatment with a silane compound containing a hydrophobic group. The invention is particularly useful for treating hydrophilic mineral particles. The treated particles can be used, for example, as fillers in polymer masterbatches.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: July 16, 2002
    Assignee: Bayer Inc.
    Inventor: Ahti Koski
  • Process for hydrophobicizing particles and their use in dispersions
    Patent number: 6323260
    Abstract: Particles are hydrophobicized by treatment with a compound containing amino and silane groups. The invention is particularly useful for treating hydrophilic inorganic particles. The treated particles can be used, for example, as a compound agent for polymers. The production and use of a predispersion or concentrate comprising a major amount of the treated particles and a binder is also described.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: November 27, 2001
    Assignees: Bayer Inc., Rhein Chemie Corporation
    Inventors: Ahti A. Koski, Anders H. Johansson
  • Elastomeric butyl compounds with improved chemical bonding between the butyl elastomer and the filler
    Publication number: 20010009948
    Abstract: The invention provides a process for preparing a filled halobutyl elastomer which comprises admixing a halobutyl elastomer, particles of filler and a silane that has at least one hydroxyl group or hydrolysable group attached to a silicon atom of the silane, and curing the filled halobutyl elastomer with sulphur. The invention also provides a filled composition that has improved properties when compared with known carbon black filled elastomeric compositions.
    Type: Application
    Filed: December 20, 2000
    Publication date: July 26, 2001
    Inventors: William Hopkins, Carl Walter von Hellens, Ahti Koski, John Rausa
  • Modular reactor system allowing control of particle size during chemical precipitation
    Publication number: 20010006611
    Abstract: A reactor assembly comprising a substantially elongate tubular housing, at least one reactant inlet, at least one reaction mixture outlet disposed above the at least one reactant inlet, and agitator disposed in a region near the at least one reactant inlet and a perforated member disposed in tubular housing between the agitator and the reaction mixture outlet.
    Type: Application
    Filed: December 20, 2000
    Publication date: July 5, 2001
    Inventors: Ahti Koski, Gilles Arsenault, David Drope
  • Zinc peroxide process
    Patent number: 4394488
    Abstract: A process is provided for the production of a mixture of butadiene-acrylonitrile polymer and zinc peroxide which comprises (i) reacting an agitated aqueous mixture of French Process zinc oxide, sulphuric acid and hydrogen peroxide to form an aqueous slurry of a mixture of zinc peroxide and zinc oxide, and (ii) mixing with said slurry a latex of a butadiene-acrylonitrile polymer, followed by coagulating the mixture and recovering and drying the product.
    Type: Grant
    Filed: July 20, 1982
    Date of Patent: July 19, 1983
    Assignee: Polysar Limited
    Inventors: Chan J. Kim, Ahti A. Koski
  • Ascorbate short-stops
    Patent number: 4242477
    Abstract: The polymerization of butadiene and styrene in an emulsion, free-radical polymerization process using a persulphate initiator is effectively short-stopped by the addition of ascorbic acid or the sodium or potassium salts thereof. The butadiene-styrene polymer so produced may be used in those end uses generally associated with the prior known use of such polymers.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: December 30, 1980
    Assignee: Polysar Limited
    Inventors: Ahti A. Koski, Melvin J. G. Davidson