Patents Assigned to Perfect Defense Technology Co., Ltd.
  • Chemical resistant ionomers and protective coverings
    Patent number: 8299147
    Abstract: This invention relates to novel chemical resistant, film forming, and moisture vapor permeable ionomers, including specialized polyurethane ionomers, polyurea ionomers, polyamide ionomers, polyester ionomers, or a mixture of the said ionomers, having high content of covalent-bonded ionic groups, total >100 milli-equivalents per 100 gram of ionomers. These specialized ionomers have low noxious chemical crossover rate, high moisture vapor transmission rate, hydrolytically stable in humid environment, and capable of forming thin films.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: October 30, 2012
    Assignee: Perfect Defense Technology Co., Ltd.
    Inventor: Huisheng Wu