Patents by Inventor Yin-Shen Chang

Yin-Shen Chang 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).

  • Process to produce fluoropolymer-based latex with mechanical stability
    Patent number: 10414879
    Abstract: The present disclosure relates to a polymerization process wherein the emulsifier is introduced in an initial batch as well as during a continuous feed to provide improved mechanical stability of the generated latex. Improved soap coverage can also be achieved during the polymerization process.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: September 17, 2019
    Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
    Inventors: Vern Lowry, Yin-Shen Chang
  • PROCESS TO PRODUCE FLUOROPOLYMER-BASED LATEX WITH MECHANICAL STABILITY
    Publication number: 20180105650
    Abstract: The present disclosure relates to a polymerization process wherein the emulsifier is introduced in an initial batch as well as during a continuous feed to provide improved mechanical stability of the generated latex. Improved soap coverage can also be achieved during the polymerization process.
    Type: Application
    Filed: April 4, 2016
    Publication date: April 19, 2018
    Inventors: Vern Lowry, Yin-Shen Chang
  • Thermoplastic compositions providing matt surface
    Patent number: 6812282
    Abstract: A low gloss thermoplastic composition suitable for making article having low gloss and a process for its preparation are disclosed. The composition contains (I) a resinous component that includes (a) a (co)polyalkyl (meth)acrylate rubber characterized that it contains no grafted phase, (b) a poly(vinyl aromatic-co-nitrile)-grafted (co)polyalkyl (meth)acrylate rubber, and (c) a poly(vinylaromatic-co-nitrile), and (II) a gloss-reducing agent that is the reaction product of (d) a compound having two or more maleic anhydride groups per molecule, and (e) a compound having two or more terminal primary amine groups per molecule, with the proviso that the total of the maleic anhydride groups per molecule and the terminal primary amine functional groups per molecule is greater than 4.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: November 2, 2004
    Assignee: Bayer Polymers LLC
    Inventors: Moh-Ching Oliver Chang, Yin-Shen Chang
  • THERMOPLASTIC COMPOSITIONS PROVIDING MATT SURFACE
    Publication number: 20040048980
    Abstract: A low gloss thermoplastic composition suitable for making article having low gloss and a process for its preparation are disclosed. The composition contains (I) a resinous component that includes (a) a (co)polyalkyl (meth)acrylate rubber characterized that it contains no grafted phase, (b) a poly(vinyl aromatic-co-nitrile)-grafted (co)polyalkyl (meth)acrylate rubber, and (c) a poly(vinylaromatic-co-nitrile), and (II)a gloss-reducing agent that is the reaction product of (d) a compound having two or more maleic anhydride groups per molecule, and (e) a compound having two or more terminal primary amine groups per molecule, with the proviso that the total of the maleic anhydride groups per molecule and the terminal primary amine functional groups per molecule is greater than 4.
    Type: Application
    Filed: September 10, 2002
    Publication date: March 11, 2004
    Inventors: Moh-Ching Oliver Chang, Yin-Shen Chang