Patents by Inventor Jyun-Ru SUN

Jyun-Ru SUN 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).

  • Modified polyvinyl alcohol-based polymer and its application
    Patent number: 11492436
    Abstract: The present disclosure provides a modified polyvinyl alcohol-based polymer, which comprises a modifying monomer unit represented by Formula wherein, X is a moiety comprising an alkenyl group, and the modified polyvinyl alcohol-based polymer has a saponification degree of 67 mol % to 78 mol % and a modification rate of 0.02 mol % to 1.5 mol %. The modified polyvinyl alcohol-based polymer is suitable to be used as a dispersant for suspension polymerization, to make the obtained polyvinyl chloride-based resin have reduced particle diameter and few coarse particles.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: November 8, 2022
    Assignee: CHANG CHUN PETROCHEMICAL CO., LTD.
    Inventors: Jyun-Ru Sun, Huan-Ming Chang, Cheng-Fan Wang, Chia-Hao Hsu
  • MODIFIED POLYVINYL ALCOHOL-BASED POLYMER AND ITS APPLICATION
    Publication number: 20220251273
    Abstract: The present disclosure provides a modified polyvinyl alcohol-based polymer, which comprises a modifying monomer unit represented by Formula wherein, X is a moiety comprising an alkenyl group, and the modified polyvinyl alcohol-based polymer has a saponification degree of 67 mol % to 78 mol % and a modification rate of 0.02 mol % to 1.5 mol %. The modified polyvinyl alcohol-based polymer is suitable to be used as a dispersant for suspension polymerization, to make the obtained polyvinyl chloride-based resin have reduced particle diameter and few coarse particles.
    Type: Application
    Filed: January 24, 2022
    Publication date: August 11, 2022
    Inventors: Jyun-Ru SUN, Huan-Ming CHANG, Cheng-Fan WANG, Chia-Hao HSU