Patents by Inventor Ken E. Bowen

Ken E. Bowen 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 making high impact strength polystyrene and related compositions
    Patent number: 7875678
    Abstract: Compositions, processes, and methods are provided relating to styrenic polymers, including high impact polystyrene (HIPS), also referred to as rubber-modified polystyrene. In one aspect, a process is provided for making high impact polystyrenes, comprising the steps of combining a monovinylarene component, a monovinylarene-conjugated diene block copolymer, and a conjugated diene polymer. In another aspect, the feed components form an emulsion having a continuous phase and a dispersed phase. The continuous phase comprises at least a portion of the monovinylarene component and at least a portion of the conjugated diene polymer. The dispersed phase is suspended within the continuous phase, and comprises globules having at least a portion of the monovinylarene-conjugated diene block copolymer, a remaining portion of the monovinylarene component, and a remaining portion of the conjugated diene polymer.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: January 25, 2011
    Assignee: Chevron Phillips Cheimcal Company, LP
    Inventors: Michael J. Hanner, Chen-Youn Sue, Clifford C. Pettey, Carleton Stouffer, Paul M. Hunt, Ken E. Bowen