Patents by Inventor Hoa X. Nguyen

Hoa X. Nguyen 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).

  • Epoxy matrix containing amine hardener and micropulverized polyimide
    Patent number: 5310825
    Abstract: The subject invention relates to a toughened epoxy matrix formulation useful as a prepreg for fiber reinforcements comprising at least two epoxy components, an amine hardener and about 10%-25% of a micropulverized polyimide thermoplastic having a molecular weight of from about 20,000 to about 100,000 and Tg of at least about 220.degree. C. The invention further relates to a process for preparing a toughened epoxy matrix formulation comprising:a. preheating a blend of at least two epoxy compounds to a temperature of about 130.degree. F. to about 140.degree. F.;b. blending into the epoxy blend from step (a) a micropulverized polyimide thermoplastic;c. mixing the blend of epoxy and thermoplastic at a temperature of about 110.degree. F. to about 130.degree. F.; andd. adding to the blend of epoxy and thermoplastic an amine hardener and mixing at about 110.degree. F. to about 130.degree. F. until a low mix viscosity is obtained.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: May 10, 1994
    Assignee: BP Chemicals (Hitco) Inc.
    Inventors: Eduard P. Babayan, Hoa X. Nguyen