Patents by Inventor SHAOHONG XU

SHAOHONG XU 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).

  • Block copolymer comprising a block with glass transition temperature higher than 100° C. and method for preparing the same
    Patent number: 9920156
    Abstract: The present invention discloses a block copolymer comprising a block with glass transition temperature higher than 100° C. and a method for preparing the same. In the method, latex of a block copolymer is prepared by taking n-butyl acrylate as a soft block, random copolymer of styrene and ?-methyl-?-methylene-?-butyrolactone as a hard block, utilizing emulsion polymerization system and reversible addition fragmentation chain transfer radical polymerization technology. The method utilizes an amphiphilic macromolecule reversible addition fragmentation chain transfer agent has dual function of both chain transfer agent and emulsifier, thus can achieve good control of monomer polymerization and avoid the use of traditional emulsifier; the reaction has no polymerization inhibition period, has fast reaction rate and high final conversion; colloidal particles can stably grow; product has a hard block with glass transition temperature up to 155° C.
    Type: Grant
    Filed: January 10, 2015
    Date of Patent: March 20, 2018
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Shaohong Xu, Xiang Gao, Yingwu Luo
  • BLOCK COPOLYMER COMPRISING A BLOCK WITH GLASS TRANSITION TEMPERATURE HIGHER THAN 100°C AND METHOD FOR PREPARING THE SAME
    Publication number: 20150126667
    Abstract: The present invention discloses a block copolymer comprising a block with glass transition temperature higher than 100° C. and a method for preparing the same. In the method, latex of a block copolymer is prepared by taking n-butyl acrylate as a soft block, random copolymer of styrene and ?-methyl-?-methylene-?-butyrolactone as a hard block, utilizing emulsion polymerization system and reversible addition fragmentation chain transfer radical polymerization technology. The method utilizes an amphiphilic macromolecule reversible addition fragmentation chain transfer agent has dual function of both chain transfer agent and emulsifier, thus can achieve good control of monomer polymerization and avoid the use of traditional emulsifier; the reaction has no polymerization inhibition period, has fast reaction rate and high final conversion; colloidal particles can stably grow; product has a hard block with glass transition temperature up to 155° C.
    Type: Application
    Filed: January 10, 2015
    Publication date: May 7, 2015
    Inventors: SHAOHONG XU, Xiang Gao, Yingwu Luo