Patents by Inventor Changbing Xie

Changbing Xie 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).

  • Compound catalyst system for synthesizing polyethylenes or copolymers of ethylene having bimodal or broad molecular weight distributions, process for preparing the same and use of the same
    Patent number: 6387839
    Abstract: The present invention provides a compound catalyst system useful for synthesizing polyethylenes or copolymers of ethylene having bimodal or broad molecular weight distributions, prepared by incorporating an organic alcohol as an electron-donor compound and an aluminoxane compound into the prior art compound catalyst systems, thereby promoting the activities of the two active centers, which leads to not only a large improvement in the activity of the catalyst system, but also the formation of polyethylenes and copolymers of ethylene having bimodal or broad molecular weight distributions, which in turn gives polymers having excellent processability and mechanical properties. A process for preparing the solid catalyst component used in the compound catalyst system according to the present invention and use of the compound catalyst system are also disclosed.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: May 14, 2002
    Assignees: China Petrochemical Corporation, Beijing Research Institute of Chemical Industry Sinopec
    Inventors: Maozhu Jin, Yuexiang Liu, Renqi Peng, Huibo Shen, Meizhen Yin, Zhaowen Ma, Changbing Xie, Yijing Sun, Baolan Zhu, Baoquan Xing