Patents by Inventor David P. Ashton

David P. Ashton 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).

  • Patent number: 5578673
    Abstract: A polymeric dispersant having a low T.sub.g polymer component, e.g. polybutadiene, and a pendant silylated group with hydrolysable groups capable of associating with and dispersing. finely divided inorganic fillers. Curable compositions containing the polymeric dispersant can be cured into composite materials having improved resistance to stress induced by thermal cycling.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: November 26, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: David P. Ashton, Geraldine A. Moorman, Roger N. Rothon
  • Patent number: 5530064
    Abstract: A polymeric dispersant having a low T.sub.g polymer component, e.g. polybutadiene, and a pendant silylated group with hydrolyzable groups capable of associating with and dispersing finely divided inorganic fillers. Curable compositions containing the polymeric dispersant can be cured into composite materials having improved resistance to stress induced by thermal cycling.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: June 25, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: David P. Ashton, Geraldine A. Moorman, Roger N. Rothon
  • Patent number: 5519083
    Abstract: Highly filled, curable compositions containing a curable liquid, e.g. methyl methacrylate; 20 to 80% by weight of a finely divided inorganic filler of defined particle size, e.g. silica; a non-functionalized polymer containing a low Tg component which is soluble in the curable liquid, e.g. a non-functionalized vinyl aromatic/conjugated diene block copolymer; and other components which diperse the filler in the curable liquid and couple the filler to the matrix can be used to produce cured composites which show improved resistance to stress induced by thermal cycling.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: May 21, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: David P. Ashton, Geraldine A. Moorman, Roger N. Rothon
  • Patent number: 5519081
    Abstract: Highly filled, curable compositions containing a curable liquid, e.g. methyl methacrylate; 20 to 80% by weight of a finely divided inorganic filler of defined particle size, e.g. silica; a functionalized polymer containing a low Tg component which is soluble in the curable liquid, e.g. a functionalized vinyl aromatic/conjugated diene block copolymer; and other components which diperse the filler in the curable liquid and couple the filler to the matrix can be used to produce cured composites which show improved resistance to stress induced by thermal cycling.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: May 21, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: David P. Ashton, Geraldine A. Moorman, Roger N. Rothon
  • Patent number: 4745235
    Abstract: A method for the preparation of an organic fluoride by contacting a fluoroformic acid ester with alumina at a temperature in the range 200.degree.-600.degree. C.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: May 17, 1988
    Assignee: Imperial Chemical Industries PLC
    Inventors: David P. Ashton, Thomas A. Ryan, Brett A. Wolfindale