Patents by Inventor Jianan Guan

Jianan Guan 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).

  • End-group functionalized comb structure polycarboxylic acid and method for preparing the same
    Patent number: 11339253
    Abstract: A method for preparing comb structure temperature/pH-responsive polycarboxylic acid by end-group functionalization adopts temperature/pH-responsive monomer, unsaturated halogenated hydrocarbon, small monomer of carboxylic acid and other raw materials to prepare polycarboxylic acid material via self-polymerization, substitution and copolymerization. Temperature/pH-responsive monomers are first self-polymerized to obtain temperature/pH-responsive polymer chain with end-group functionalization, and then substitution with unsaturated halogenated hydrocarbons is conducted to obtain temperature/pH-responsive macromonomers with end-group functionalization, finally the obtained product is copolymerized with small carboxylic acid monomers to prepare comb structure polymer with polycarboxylic acid main chain and temperature/pH-responsive side chain.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: May 24, 2022
    Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
    Inventors: Xiao Liu, Xiabing Bai, Jianan Guan, Ziming Wang, Guanghong Lai, Shanshan Qian, Qian Xu
  • Preparation method of temperature/pH-responsive polycarboxylic acid
    Patent number: 11149104
    Abstract: A preparation method of comb structure temperature/pH-responsive polycarboxylic acid adopts acrylic ester, temperature/pH-responsive monomer and other raw materials to obtain polycarboxylic acid via acrylate monomer self-polymerization, grafting with temperature/pH-responsive monomers and hydrolyzation. In other words, acrylate is used as the reaction monomer to polymerize polyacrylate with controllable molecular weight under the action of initiator and chain transfer agent, then the graft copolymers are copolymerized with temperature/pH-responsive monomers to obtain graft copolymers with acrylate polymers main chain and temperature/pH-responsive polymer side chains. Finally, the graft copolymer is hydrolyzed to obtain the comb structure temperature/pH-responsive polycarboxylic acid with polyacrylic acid main chain and temperature/pH-responsive monomer side chain.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: October 19, 2021
    Assignee: BEIJING UNIVERSITY OF TECHNOLOGY
    Inventors: Xiao Liu, Qian Xu, Ziming Wang, Guanghong Lai, Jianan Guan, Shanshan Qian, Xiabing Bai
  • PREPARATION METHOD OF TEMPERATURE/PH-RESPONSIVE POLYCARBOXYLIC ACID
    Publication number: 20200223970
    Abstract: A preparation method of comb structure temperature/pH-responsive polycarboxylic acid adopts acrylic ester, temperature/pH-responsive monomer and other raw materials to obtain polycarboxylic acid via acrylate monomer self-polymerization, grafting with temperature/pH-responsive monomers and hydrolyzation. In other words, acrylate is used as the reaction monomer to polymerize polyacrylate with controllable molecular weight under the action of initiator and chain transfer agent, then the graft copolymers are copolymerized with temperature/pH-responsive monomers to obtain graft copolymers with acrylate polymers main chain and temperature/pH-responsive polymer side chains. Finally, the graft copolymer is hydrolyzed to obtain the comb structure temperature/pH-responsive polycarboxylic acid with polyacrylic acid main chain and temperature/pH-responsive monomer side chain.
    Type: Application
    Filed: September 13, 2019
    Publication date: July 16, 2020
    Inventors: XIAO LIU, QIAN XU, ZIMING WANG, GUANGHONG LAI, JIANAN GUAN, SHANSHAN QIAN, XIABING BAI
  • END-GROUP FUNCTIONALIZED COMB STRUCTURE POLYCARBOXYLIC ACID AND METHOD FOR PREPARING THE SAME
    Publication number: 20200216619
    Abstract: A method for preparing comb structure temperature/pH-responsive polycarboxylic acid by end-group functionalization adopts temperature/pH-responsive monomer, unsaturated halogenated hydrocarbon, small monomer of carboxylic acid and other raw materials to prepare polycarboxylic acid material via self-polymerization, substitution and copolymerization. Temperature/pH-responsive monomers are first self-polymerized to obtain temperature/pH-responsive polymer chain with end-group functionalization, and then substitution with unsaturated halogenated hydrocarbons is conducted to obtain temperature/pH-responsive macromonomers with end-group functionalization, finally the obtained product is copolymerized with small carboxylic acid monomers to prepare comb structure polymer with polycarboxylic acid main chain and temperature/pH-responsive side chain.
    Type: Application
    Filed: September 13, 2019
    Publication date: July 9, 2020
    Inventors: Xiao Liu, Xiabing Bai, Jianan Guan, Ziming Wang, Guanghong Lai, Shanshan Qian, Qian Xu