Patents by Inventor Caideng Yuan

Caideng Yuan 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).

  • Method for preparing aqueous polyacrylate modified polyurethane dispersions
    Patent number: 9234068
    Abstract: A novel method for the preparation of an aqueous polyacrylate modified polyurethane dispersion is disclosed. The preparation method includes three main steps: a) preparation of polyacrylate polymer or copolymer emulsion; b) preparation of polyurethane prepolymer with carboxylic groups and neutralization treatment to the carboxylic groups; and c) dispersion and chain-extension of polyurethane prepolymer by adding the polyacrylate emulsion into the polyurethane prepolymer under vigorous agitation, or other mechanical operation. The aqueous polyacrylate modified polyurethane dispersion has self-crosslinkability when an unsaturated acetoacetoxy compound is used for the preparation of the polyacrylate emulsion.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: January 12, 2016
    Assignee: The Hong Kong University of Science and Technologhy
    Inventors: Caideng Yuan, Guohua Chen, Xixiang Zhang, Zongjin Li, Zhimeng Liu
  • Method for preparing aqueous polyacrylate modified polyurethane dispersions
    Publication number: 20090111934
    Abstract: A novel method for the preparation of an aqueous polyacrylate modified polyurethane dispersion is disclosed. The preparation method includes three main steps: a) preparation of polyacrylate polymer or copolymer emulsion; b) preparation of polyurethane prepolymer with carboxylic groups and neutralization treatment to the carboxylic groups; and c) dispersion and chain-extension of polyurethane prepolymer by adding the polyacrylate emulsion into the polyurethane prepolymer under vigorous agitation, or other mechanical operation. The aqueous polyacrylate modified polyurethane dispersion has self-crosslinkability when an unsaturated acetoacetoxy compound is used for the preparation of the polyacrylate emulsion.
    Type: Application
    Filed: October 2, 2008
    Publication date: April 30, 2009
    Inventors: Caideng Yuan, Guohua Chen, Xixiang Zhang, Zongjin Li, Zhimeng Liu