Patents by Inventor Cheng-Lung Chao

Cheng-Lung Chao 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).

  • Functional group-containing butadiene based impact modifier
    Patent number: 5668215
    Abstract: The present invention provides a functional group-containing alkyl acrylate-butadiene-aromatic vinyl compound copolymer which is obtained from the following layers by emulsion graftlinking polymerization: an inner layer comprising polybutadiene or an aromatic vinyl compound-butadiene copolymer; a middle layer comprising an aromatic vinyl compound-an alkyl acrylate copolymer; and an outer layer comprising an alkyl acrylate-a functional group-containing vinyl compound copolymer. The functional group-containing alkyl acrylate-butadiene-aromatic vinyl compound copolymer can be incorporated into a PC/PBT alloy as an impact modifier, thus the impact strength of the modified alloy composition at room temperature and low temperatures can be increased effectively.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: September 16, 1997
    Assignee: Industrial Technology Research Institute
    Inventors: Cheng-Lung Chao, Juh-Shyong Lee, Feng-Chih Chang
  • Functional group-containing butadiene based impact modifier
    Patent number: 5576394
    Abstract: The present invention provides a functional group-containing alkyl acrylate-butadiene-aromatic vinyl compound copolymer which is obtained from the following layers by emulsion graftlinking polymerization: an inner layer comprising polybutadiene or an aromatic vinyl compound-butadiene copolymer; a middle layer comprising an aromatic vinyl compound--an alkyl acrylate copolymer; and an outer layer comprising an alkyl acrylate--a functional group-containing vinyl compound copolymer. The functional group-containing alkyl acrylate-butadiene-aromatic vinyl compound copolymer can be incorporated into a PC/PBT alloy as an impact modifier, thus the impact strength of the modified alloy composition at room temperature and low temperatures can be increased effectively.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: November 19, 1996
    Assignee: Industrial Technology Research Institute
    Inventors: Cheng-Lung Chao, Juh-Shyong Lee, Feng-Chih Chang