Patents by Inventor Fangming Zhu

Fangming Zhu 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).

  • Titanocene complexes and its catalyst for preparing syndiotactic polystyrene
    Patent number: 6921734
    Abstract: The present invention relates to a titanocene complex and a catalyst comprising the same and an alkylaluminoxane for preparing syndiotactic polystyrene. The catalyst is applicable to the industrial production of the syndiotactic polymerization of styrene. The titanocene complex has a general formula of R1Ti(OR2R3)3, where R1 is Cp or Cp containing 1-5 C1-4 alkyls, R2 is an aryl containing 6-12 carbon atoms, R3 is a halogen, OR2R3 is a halogenated aryloxy ligand.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: July 26, 2005
    Assignees: China Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Tech.
    Inventors: Zhigang Shen, Shang'an Lin, Wenle Zhou, Fangming Zhu, Huiming Zhang, Zaiku Xie
  • Titanocene complexes and its catalyst for preparing syndiotactic polystyrene
    Publication number: 20040023794
    Abstract: The present invention relates to titanocene complexes and their catalysts for preparing syndiotactic polystyrene, mainly solving the problem in the prior arts that the catalytic efficiency is not high and therefore the compound is difficult to meet the need of the industry when used for the syndiotactic polymerization of styrene. The present invention has better solved this problem and is applicable to the industrial production of the syndiotactic polymerization of styrene by adopting the technical solution of using titanocene complexes with a general formula R1Ti(OR2R3)3 as a main catalyst, where R1 is cyclopentadienyl or cyclopentadienyl containing 1-5 C1-4 alkyls, R2 is an aryl containing 6-12 carbon atoms, R3 is a halogen, and there is an oxygen atom between Ti and R2 to connect them, and constituting a catalyst with alkylaluminoxyl or/and triisobutylaluminum.
    Type: Application
    Filed: April 9, 2003
    Publication date: February 5, 2004
    Applicants: China Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Tech
    Inventors: Zhigang Shen, Shang?apos;an Lin, Wenle Zhou, Fangming Zhu, Huiming Zhang, Zaiku Xie