Patents by Inventor He Fei-Feng

He Fei-Feng 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 for producing epoxy adhesive auxiliary, and epoxy adhesive
    Patent number: 5578649
    Abstract: Disclosed herein are a process for producing an epoxy adhesive auxiliary which is a liquid reclaimed from rigid polyurethane foam and an epoxy adhesive which contains the auxiliary. The epoxy adhesive auxiliary can be produced, without requiring any special apparatus for purification, by incorporating rigid polyurethane foam (200 g) in powder form (5-10 mm in size) with glycol such as polyethylene glycol (100 g) and amino alcohol such as 2-aminoethanol (5 g), and heating them at 150.degree.-280.degree. C., thereby chemically decomposing the rigid polyurethane foam into a viscous liquid. This reclaimed liquid (50-300 g) is incorporated as such into an epoxy resin adhesive base such as bisphenol A-type epoxy resin (100 g), containing optional diethylamine (6-8 g). The resulting epoxy resin adhesive is superior in tensile shear bond strength.
    Type: Grant
    Filed: March 13, 1995
    Date of Patent: November 26, 1996
    Assignee: INOAC Corporation
    Inventors: Yoshio Imai, He Fei-Feng, Xue Shu-Chang, Takao Hidai