Patents by Inventor Duoying CHEN

Duoying CHEN 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).

  • HIGHLY ALKALI-STABLE POLY(ARYLENE ALKYLENE PIPERIDINIUM) CATIONIC POLYMERS AND PREPARATION METHODS AND APPLICATIONS
    Publication number: 20250376553
    Abstract: The present invention relates to the field of cationic polymers, and in particular, to highly alkali-stable poly(arylene alkylene piperidinium) cationic polymers and preparation methods and applications. The preparation method for the highly alkali-stable poly(arylene alkylene piperidinium) cationic polymers includes the following steps: performing catalytic polycondensation on 1-R6-piperidine-3-carboxaldehyde or a salt or hydrate thereof and an aromatic compound to obtain a polymer having a piperidine moiety; and then further subjecting the polymer to a quaternization reaction to obtain the poly(arylene alkylene piperidinium) cationic polymer.
    Type: Application
    Filed: August 15, 2025
    Publication date: December 11, 2025
    Applicant: Hefei University of Technology
    Inventors: Haibing Wei, Tao Wang, Duoying Chen, Yunsheng Ding
  • Highly alkali-stable cationic polymers and their preparation methods and applications
    Patent number: 12240924
    Abstract: The present invention discloses a preparation method of highly alkali-stable cationic polymers, including the following steps: placing a polymerization mixture comprising 1-R1-3-piperidinone or its salts or hydrate thereof and arene monomers in a first organic solvent, performing catalytic polycondensation by adding organic strong acids, and obtaining a polymer dispersion with piperidine moieties; slowly dropping the dispersion of the polymer with piperidine moieties into a first precipitant, and obtaining a polymer powder with piperidine moieties after drying; dissolving the polymer powder with piperidine moieties of in a second organic solvent, after adding the quaternization reagent, obtaining a cationic polymer solution.
    Type: Grant
    Filed: May 2, 2024
    Date of Patent: March 4, 2025
    Assignees: HEFEI UNIVERSITY OF TECHNOLOGY, ANQING POLYROCKS TECHNOLOGY RESEARCH CO., LTD.
    Inventors: Haibing Wei, Tao Wang, Hongfang Zhu, Yatao Liang, Ming Xu, Duoying Chen, Yunsheng Ding
  • HIGHLY ALKALI-STABLE CATIONIC POLYMERS AND THEIR PREPARATION METHODS AND APPLICATIONS
    Publication number: 20240317902
    Abstract: The present invention discloses a preparation method of highly alkali-stable cationic polymers, including the following steps: placing a polymerization mixture comprising 1-R1-3-piperidinone or its salts or hydrate thereof and arene monomers in a first organic solvent, performing catalytic polycondensation by adding organic strong acids, and obtaining a polymer dispersion with piperidine moieties; slowly dropping the dispersion of the polymer with piperidine moieties into a first precipitant, and obtaining a polymer powder with piperidine moieties after drying; dissolving the polymer powder with piperidine moieties of in a second organic solvent, after adding the quaternization reagent, obtaining a cationic polymer solution.
    Type: Application
    Filed: May 2, 2024
    Publication date: September 26, 2024
    Applicants: HEFEI UNIVERSITY OF TECHNOLOGY, ANQING POLYROCKS TECHNOLOGY RESEARCH CO., LTD.
    Inventors: Haibing WEI, Tao WANG, Hongfang ZHU, Yatao LIANG, Ming XU, Duoying CHEN, Yunsheng DING