Patents by Inventor Geoffrey H. Smith

Geoffrey H. Smith 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).

  • Polyester modifiers for vinyl halide polymers
    Patent number: 4206291
    Abstract: Polyvinyl halide or polyvinyl graft copolymers intimately mixed with a polyester derived mainly from an halogenated bicycloheptene carboxylic acid or anhydride such as chlorendic acid or anhydride and an alkylene glycol or alkylene oxide such as ethylene oxide are provided. The graft copolymers of the invention are obtained by polymerizing a vinyl halide in bulk in contact with an olefin polymer. The graft copolymer compositions of the invention have good clarity and provide improved processing characteristics and increased impact strength without reduction in heat distortion resulting from the addition of the polyester. The improved impact strength polyvinyl halide compositions of the invention can include blends of the polyester of the invention with modifying compounds, such as alkyl methacrylate-butadiene/styrene graft polymer impact modifiers and halogenated polyvinyl chloride. Blends of vinyl halide polymers with the polyesters of the invention provide compositions having improved processability.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: June 3, 1980
    Assignee: Hooker Chemicals & Plastics Corp.
    Inventors: Akio Takahashi, Geoffrey H. Smith, George C. Hopkins
  • Polyester modifiers for vinyl halide polymers
    Patent number: 4155951
    Abstract: Polyvinyl halide or polyvinyl halide graft copolymers intimately mixed with a polyester derived mainly from an halogenated bicycloheptene carboxylic acid or anhydride such as chlorendic acid or anhydride and an alkylene glycol or alkylene oxide such as ethylene glycol or ethylene oxide are provided. The graft copolymers of the invention are obtained by polymerizing a vinyl halide in bulk in contact with an olefin polymer. The graft copolymer compositions of the invention have good clarity and provide improved processing characteristics and increased impact strength without reduction in heat distortion resulting from the addition of the polyester. The improved impact strength polyvinyl halide compositions of the invention can include blends of the polyester of the invention with modifying compounds, such as alkyl methacrylate-butadiene/styrene graft polymer impact modifiers and halogenated polyvinyl chloride.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: May 22, 1979
    Assignee: Hooker Chemicals & Plastics Corp.
    Inventors: Akio Takahashi, Geoffrey H. Smith, George C. Hopkins
  • Oxyalkylated novolac modifiers for polyvinyl halide compositions
    Patent number: 4087480
    Abstract: There is provided a polymer composition based upon an oxyalkylated novolac intermixed with a vinyl halide polymer. The compositions of the invention provide improved processing characteristics with reduced melt viscosity and improved physical and mechanical properties. Mixtures of (1) polyvinyl halide, oxyalkylated novolac and impact modifier, such as an acrylic polymer or (2) mixtures of oxyalkylated novolac and polyvinyl halide modified to provide improved impact strength by graft polymerization show improved compatibility of the rubbery polymer phase resulting in optimum impact strength for the composition.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: May 2, 1978
    Assignee: Hooker Chemicals & Plastics Corporation
    Inventors: Akio Takahashi, Geoffrey H. Smith, Brian M. Rushton, Myron C. Annis
  • Polyester modifiers for vinyl halide polymers
    Patent number: 3956422
    Abstract: Polyvinyl halide or polyvinyl halide graft copolymers intimately mixed with a polyester derived mainly from an halogenated bicycloheptene carboxylic acid or anhydride such as chlorendic acid or anhydride and an alkylene glycol or alkylene oxide such as ethylene glycol or ethylene oxide are provided. The graft copolymers of the invention are obtained by polymerizing a vinyl halide in bulk in contact with an olefin polymer. The graft copolymer compositions of the invention have good clarity and provide improved processing characteristics and increased impact strength without reduction in heat distortion resulting from the addition of the polyester. The improved impact strength polyvinyl halide compositions of the invention can include blends of the polyester of the invention with modifying compounds, such as alkyl methacrylate-butadiene/styrene graft polymer impact modifiers and halogenated polyvinyl chloride.
    Type: Grant
    Filed: January 31, 1975
    Date of Patent: May 11, 1976
    Assignee: Hooker Chemicals & Plastics Corporation
    Inventors: Akio Takahashi, Geoffrey H. Smith, George C. Hopkins