Patents by Inventor Courtney S. Spain

Courtney S. Spain 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).

  • Procatalyst composition made with a combination of internal electron donors
    Patent number: 11014995
    Abstract: A phthalate-free procatalyst composition is disclosed for olefin polymerization that exhibits excellent polymerization activity and response to hydrogen, and can produce a polyolefin exhibiting high stereoregularity, high melt flow rate, and desirable molecular weight distribution. The method for producing the procatalyst composition includes reaction of a magnesium support precursor with a tetravalent titanium halide and a combination of different internal electron donors. The first internal electron donor may comprise one or more substituted phenylene aromatic diester and the second internal electron donor may comprise a polyether, preferably a 1,3-diether. In one embodiment, the support precursor comprises a spherical spray crystalized MgCl2-EtOH adduct.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: May 25, 2021
    Assignee: W.R. Grace & Co.—Conn.
    Inventors: Michael J. Elder, Ronald A. Epstein, Timothy A. Boyer, Courtney S. Spain, Michael S. Miller
  • PROCATALYST COMPOSITION MADE WITH A COMBINATION OF INTERNAL ELECTRON DONORS
    Publication number: 20190211118
    Abstract: A phthalate-free procatalyst composition is disclosed for olefin polymerization that exhibits excellent polymerization activity and response to hydrogen, and can produce a polyolefin exhibiting high stereoregularity, high melt flow rate, and desirable molecular weight distribution. The method for producing the procatalyst composition includes reaction of a magnesium support precursor with a tetravalent titanium halide and a combination of different internal electron donors. The first internal electron donor may comprise one or more substituted phenylene aromatic diester and the second internal electron donor may comprise a polyether, preferably a 1,3-diether. In one embodiment, the support precursor comprises a spherical spray crystalized MgCl2-EtOH adduct.
    Type: Application
    Filed: September 28, 2017
    Publication date: July 11, 2019
    Inventors: Michael J. Elder, Ronald A. Epstein, Timothy A. Boyer, Courtney S. Spain, Michael S. Miller