Patents by Inventor Jung-Sheng Pan

Jung-Sheng Pan 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).

  • Hydrogenation catalyst composition and method for hydrogenation of conjugated diene polymer
    Patent number: 7612148
    Abstract: A method for hydrogenation of a conjugated diene polymer is provided. The conjugated diene polymer in an inert organic solvent is brought into contact with hydrogen in the presence of a hydrogenation catalyst composition to selectively hydrogenate the unsaturated double bonds in the conjugated diene units of the conjugated diene polymer. The hydrogenation catalyst composition includes: (a) a titanium compound; (b) a compound represented by formula (II) or formula (III): wherein R is C1-C12 alkyl, C3-C12 cycloalkyl, aryl or alkyl aryl, M is C1-C12 alkyl, C1-C12 alkoxy, aryl, alkyl aryl, phenoxy or hydroxyl, and n=1˜3; and (c) a alkylaluminum compound.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: November 3, 2009
    Assignee: TSRC Corporation
    Inventors: Chin-Kuang Tsai, Chien-Cheng Chen, Jung-Sheng Pan
  • Hydrogenation catalyst composition and method for hydrogenation of conjugated diene polymer
    Publication number: 20080146733
    Abstract: A method for hydrogenation of a conjugated diene polymer is provided. The conjugated diene polymer in an inert organic solvent is brought into contact with hydrogen in the presence of a hydrogenation catalyst composition to selectively hydrogenate the unsaturated double bonds in the conjugated diene units of the conjugated diene polymer. The hydrogenation catalyst composition includes: (a) a titanium compound; (b) a compound represented by formula (II) or formula (III): wherein R is C1-C12 alkyl, C3-C12 cycloalkyl, aryl or alkyl aryl, M is C1-C12 alkyl, C1-C12 alkoxy, aryl, alkyl aryl, phenoxy or hydroxyl, and n=1˜3; and (c) a alkylaluminum compound.
    Type: Application
    Filed: December 19, 2007
    Publication date: June 19, 2008
    Inventors: Chih-Kuang Tsai, Chien-Cheng Chen, Jung-Sheng Pan