Patents by Inventor Linrong Song

Linrong Song 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).

  • Polycarbonate preparation method
    Patent number: 9062154
    Abstract: Provided is a polycarbonate preparation method, comprising the following steps: a) mixing a phenoxide water aqueous solution of a bisphenol and/or a polyphenol with a phosgene and an inert organic solvent, reacting, and generating a polycarbonate oligomer; b) highly emulsifying the oligomer by reinforced micromixing to form a stable emulsion; and c) introducing the emulsion into a polycondensation reactor for a chain extending reaction, separating and finally obtaining the polycarbonate. Through the reinforced micromixing, the present method can prepare the high-molecular-weight polycarbonate without any catalysts, thus simplifying the post-treatment process of the product and improving product quality.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: June 23, 2015
    Assignee: WANHUA CHEMICAL GROUP CO., LTD.
    Inventors: Lei Zhang, Hongke Zhang, Weiqi Hua, Linrong Song, Yifeng Hu, Xiwang Zang, Kai Feng
  • POLYCARBONATE PREPARATION METHOD
    Publication number: 20140350198
    Abstract: Provided is a polycarbonate preparation method, comprising the following steps: a) mixing a phenoxide water aqueous solution of a bisphenol and/or a polyphenol with a phosgene and an inert organic solvent, reacting, and generating a polycarbonate oligomer; b) highly emulsifying the oligomer by reinforced micromixing to form a stable emulsion; and c) introducing the emulsion into a polycondensation reactor for a chain extending reaction, separating and finally obtaining the polycarbonate. Through the reinforced micromixing, the present method can prepare the high-molecular-weight polycarbonate without any catalysts, thus simplifying the post-treatment process of the product and improving product quality.
    Type: Application
    Filed: November 5, 2012
    Publication date: November 27, 2014
    Applicant: WANHUA CHEMICAL GROUP CO., LTD.
    Inventors: Lei Zhang, Hongke Zhang, Weiqi Hua, Linrong Song, Yifeng Hu, Xiwang Zang, Kai Feng