Patents by Inventor Yongfu Liang

Yongfu Liang 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).

  • Tackifier and a continuous process for producing the tackifier
    Patent number: 10544335
    Abstract: A rosin dispersion is a reaction product of, by dry weight based on total dry weight of the rosin dispersion, from 80% to 98% a rosin resin, and from 2% to 20% a dispersant. The rosin resin is processed by at least one method of a) modification, b) hydrogenation or disproportionation, and c) polymerization or esterification from raw material rosins. The dispersant is selected from C18-C32 aliphatic carboxylic acids, olefin (meth) acrylic acid copolymers, and other acid/anhydride modified polymers. A continuous process for preparing the rosin dispersion and an adhesive formulation comprising the rosin dispersion are also included.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: January 28, 2020
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Miao Yang, Weichao Gu, Zhaohui Qu, Yongfu Liang
  • METHOD FOR FABRIC-ELASTOMER BONDING
    Publication number: 20190084284
    Abstract: A method for bonding a fabric to a polyolefin elastomer. The method comprises applying to the fabric: (a) from 10 to 90 wt % of an aqueous dispersion of a thermoplastic polymer; and (b) from 90 to 10 wt % of an aqueous dispersion of a rosin, wherein percentages are based on total dry weight of thermoplastic polymer and rosin.
    Type: Application
    Filed: November 16, 2018
    Publication date: March 21, 2019
    Inventors: Yong Chen, Yongchun Chen, Weichao Gu, Yongfu Liang, Xiao Yi Pang, Haiyang Yu
  • A TACKIFIER AND A CONTINUOUS PROCESS FOR PRODUCING THE TACKIFIER
    Publication number: 20170313913
    Abstract: A rosin dispersion is a reaction product of, by dry weight based on total dry weight of the rosin dispersion, from 80% to 98% a rosin resin, and from 2% to 20% a dispersant. The rosin resin is processed by at least one method of a) modification, b) hydrogenation or disproportionation, and c) polymerization or esterification from raw material rosins. The dispersant is selected from C18-C32 aliphatic carboxylic acids, olefin (meth) acrylic acid copolymers, and other acid/anhydride modified polymers. A continuous process for preparing the rosin dispersion and an adhesive formulation comprising the rosin dispersion are also included.
    Type: Application
    Filed: October 31, 2014
    Publication date: November 2, 2017
    Applicants: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Miao Yang, Weichao Gu, Zhaohui Qu, Yongfu Liang
  • METHOD FOR FABRIC-ELASTOMER BONDING
    Publication number: 20170217142
    Abstract: A method for bonding a fabric to a polyolefin elastomer. The method comprises applying to the fabric: (a) from 10 to 90 wt % of an aqueous dispersion of a thermoplastic polymer; and (b) from 90 to 10 wt % of an aqueous dispersion of a rosin, wherein percentages are based on total dry weight of thermoplastic polymer and rosin.
    Type: Application
    Filed: July 17, 2014
    Publication date: August 3, 2017
    Inventors: Yong Chen, Yongchun Chen, Weichao Gu, Yongfu Liang, Xiao Yi Pang, Haiyang Yu