Patents by Inventor Cindy S. Senger

Cindy S. Senger 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 polymerization method
    Patent number: 5212266
    Abstract: A catalyst component useful in propylene polymerization in combination with a dialkyl aluminum halide cocatalyst comprises the product of reaction of TiCl.sub.3 which is substantially free of extraneous halide with a selected electron donor compound which is dissolved in a liquid hydrocarbon solvent in which the TiCl.sub.3 is dispersed. The electron donor compound is selected from certain organic acid esters, hindered phenolic compounds and silyl esters.The catalyst of the invention provides increased activity, molecular weight control, increased isotacticity of propylene polymer products and prevents catalyst feed line pluggage, among other advantages.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: May 18, 1993
    Assignee: Quantum Chemical Corporation
    Inventors: Charles K. Buehler, Cindy S. Senger, Kenneth W. Johnson
  • Propylene polymerization catalyst and method
    Patent number: 5128294
    Abstract: A catalyst component useful in propylene polymerization in combination with a dialkyl aluminum halide cocatalyst comprises the product of reaction of TiCl.sub.3 which is substantially free of extraneous halide with a selected electron donor compound which is dissolved in a liquid hydrocarbon solvent in which the TiCl.sub.3 is dispersed. The electron donor compound is selected from certain organic acid esters, hindered phenolic compounds and silyl esters.The catalyst of the invention provides increased activity, molecular weight control, increased isotacticity of propylene polymer products and prevents catalyst feed line pluggage, among other advantages.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: July 7, 1992
    Assignee: Quantum Chemical Corporation
    Inventors: Charles K. Buehler, Cindy S. Senger, Kenneth W. Johnson