Patents by Inventor Li C. Tien

Li C. Tien 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 preparing rubber-modified styrenic polymer compositions containing hydroperoxide derivatives of rubbery polymers
    Patent number: 4876312
    Abstract: Hydroperoxidized rubber-containing polymers are prepared in a process wherein a rigid phase polymer is prepared by polymerization of one or more free radically polymerizable monomers in the presence of a hydroperoxidized rubbery intermediate in a well stirred back-mixed reactor operating under essentially homogeneous conditions at a solids content of from about 30 to about 75 percent by weight, and an initial rubber content in the feed of from about 5 to about 12 percent by weight.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: October 24, 1989
    Assignee: The Dow Chemical Company
    Inventors: Bernard J. Meister, Craig D. Dryzga, Li C. Tien