Patents by Inventor Xia Dong

Xia Dong 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).

  • Polylactic acid stereocomplex composition, its molded product, a process for its manufacture and its application
    Patent number: 9644095
    Abstract: The instant invention discloses a polylactic acid stereocomplex composition containing pure stereocomplex crystals and a process for its manufacture. The composition according to this invention comprising (a) 30-70 wt % poly (L-lactic acid) (PLLA). (b) 70-30 wt % poly (D-lactic acid) (PDLA) and (c) 0.01-10 wt % nucleating agent, which can be obtained by solution and melt blending. Stereocomplex crystals are preferentially formed according to the invention, and the homocrystals (a crystal form) for the PLLA or PDLA homopolymer can't be observed. The melting temperature of the composition according to the invention is at least 200° C., which is about 30-50° C. higher than the PLLA or PDLA homopolymer.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: May 9, 2017
    Assignees: Institute of Chemistry, Chinese Academy of Sciences, Purac Biochem B.V.
    Inventors: Xiuqin Zhang, Zujiang Xiong, Guoming Liu, Xia Dong, Tao Wen, Rui Wang, Dujin Wang
  • A POLYLACTIC ACID STEREOCOMPLEX COMPOSITION, ITS MOLDED PRODUCT, A PROCESS FOR ITS MANUFACTURE AND ITS APPLICATION
    Publication number: 20160272811
    Abstract: The instant invention discloses a polylactic acid stereocomplex composition containing pure stereocomplex crystals and a process for its manufacture. The composition according to this invention comprising (a) 30-70 wt % poly (L-lactic acid) (PLLA). (b) 70-30 wt % poly (D-lactic acid) (PDLA) and (c) 0.01-10 wt % nucleating agent, which can be obtained by solution and melt blending. Stereocomplex crystals are preferentially formed according to the invention, and the homocrystals (a crystal form) for the PLLA or PDLA homopolymer can't be observed. The melting temperature of the composition according to the invention is at least 200° C., which is about 30-50° C. higher than the PLLA or PDLA homopolymer.
    Type: Application
    Filed: March 19, 2014
    Publication date: September 22, 2016
    Inventors: Xiuqin Zhang, Zujiang Xiong, Guoming Liu, Xia Dong, Tao Wen, Rui Wang, Dujin Wang