Patents by Inventor Wen-Tung Chen

Wen-Tung Chen 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 aqueous polyurethane blocking reaction
    Patent number: 5789518
    Abstract: An improved method of reaction of water PU resins for improving the blocking reactions of beta-dicarbynal compounds and polisocynantes, and reducing the reaction time for water PU blocking, wherein the construction is: ##STR1## wherein: R.sub.1,R.sub.2,R.sub.3,R.sub.4 =hydrogen or alkyl groupn.sub.1 =1.about.100n.sub.2, n.sub.3, n.sub.4 =1.about.10The blocking agents of beta-Dicarbonyl compounds are reduced by D.sub.1 and D.sub.2 which are used in the blocking reactions of water PU.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: August 4, 1998
    Assignee: China Textile Institute
    Inventors: Shin-Chuan Yao, Jongfu Wu, Kun-Lin Cheng, Wen-Tung Chen, Fu-Fong Chang
  • Bis(4-aminophenoxy)naphthalene and its polymers
    Patent number: 5340904
    Abstract: A compound or polymer having a bis(phenoxy)naphthalene structure, a high molecular weight, and very good mechanical performance and heat-resistivity is provided. The polymer can be polyamides, polyimides or poly(amide-imide)s and can have a basic structure of ##STR1## wherein R1 is a naphthalene ring.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: August 23, 1994
    Assignee: National Science Council
    Inventors: Chin-Ping Yang, Wen-Tung Chen