Patents by Inventor Stephen Francis Broadbent

Stephen Francis Broadbent 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).

  • Propylene polymer compositions and processes for making the same
    Patent number: 7977435
    Abstract: Provided are a propylene polymer compositions comprising a propylene copolymer and a propylene homopolymer polymerized in the presence of the propylene copolymer. The propylene polymer compositions exhibit properties such as broad molecular weight distribution, low crystallinity, high solubles and superior crystallization kinetics and are useful in fast cycle-time processing methods such as injection molding, sheet extrusion, thermoforming, and oriented film fabrication. Also provided is a process for preparing the propylene polymer compositions in the presence of a catalyst and at least two electron donors using sequential or parallel polymerization reaction zones. Finally, articles made from the propylene polymer composition are provided, particularly articles requiring high stiffness, high heat deflection temperature, good fatigue resistance and low temperature impact resistance such as appliance parts.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: July 12, 2011
    Inventors: Chon-Yie Lin, Stephen Francis Broadbent
  • Propylene polymer compositions and processes for making the same
    Publication number: 20080015316
    Abstract: Provided are a propylene polymer compositions comprising a propylene copolymer and a propylene homopolymer polymerized in the presence of the propylene copolymer. The propylene polymer compositions exhibit properties such as broad molecular weight distribution, low crystallinity, high solubles and superior crystallization kinetics and are useful in fast cycle-time processing methods such as injection molding, sheet extrusion, thermoforming, and oriented film fabrication. Also provided is a process for preparing the propylene polymer compositions in the presence of a catalyst and at least two electron donors using sequential or parallel polymerization reaction zones. Finally, articles made from the propylene polymer composition are provided, particularly articles requiring high stiffness, high heat deflection temperature, good fatigue resistance and low temperature impact resistance such as appliance parts.
    Type: Application
    Filed: July 12, 2006
    Publication date: January 17, 2008
    Inventors: Chon-Yie Lin, Stephen Francis Broadbent