Patents by Inventor Xiaogan YANG

Xiaogan YANG 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).

  • Method for preparing polycarbosilane by catalytic rearranging
    Patent number: 9815944
    Abstract: This invention provides a method for preparing a polycarbosilane by decomposition and rearrangement a cyclic silane compound or chain polysilane under the catalysis of a boron-containing catalyst in a trace amount (less than 1 wt %). In the method, poly(dimethylsilane) (denoted as PDMS) or a thermal decomposition product thereof, i.e., a liquid silane-carbosilane compound (denoted as LPS), is used as the raw material, less than 1 wt % of the boron-containing catalyst (with respect to the amount of the raw material) is added, and then the temperature is gradually increased to the reaction temperature under atmospheric pressure or high pressure to perform the thermal decomposition/rearrangement reaction so as to obtain solid polycarbosilane (PCS) with a higher ceramic yield.
    Type: Grant
    Filed: June 28, 2014
    Date of Patent: November 14, 2017
    Assignee: INSTITUTE OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES
    Inventors: Yongming Li, Xiaogan Yang, Caihong Xu, Lijuan He
  • METHOD FOR PREPARING POLYCARBOSILANE BY CATALYTIC REARRANGING
    Publication number: 20170015789
    Abstract: This invention provides a method for preparing a polycarbosilane by decomposition and rearrangement a cyclic silane compound or chain polysilane under the catalysis of a boron-containing catalyst in a trace amount (less than 1 wt %). In the method, poly(dimethylsilane) (denoted as PDMS) or a thermal decomposition product thereof, i.e., a liquid silane-carbosilane compound (denoted as LPS), is used as the raw material, less than 1 wt % of the boron-containing catalyst (with respect to the amount of the raw material) is added, and then the temperature is gradually increased to the reaction temperature under atmospheric pressure or high pressure to perform the thermal decomposition/rearrangement reaction so as to obtain solid polycarbosilane (PCS) with a higher ceramic yield.
    Type: Application
    Filed: June 28, 2014
    Publication date: January 19, 2017
    Inventors: Yongming LI, Xiaogan YANG, Caihong XU, Lijuan HE