Patents by Inventor Pengjian Cheng

Pengjian Cheng 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).

  • Patent number: 11873373
    Abstract: Disclosed is a preparation method of a renewable epoxy asphalt material and a regeneration process. The preparation method comprises: I Vanillin and 4-aminophenol are reacted in water with stirring to obtain VAN-AP; II. VAN-AP is mixed with epichlorohydrin, to which tetrabutylammonium bromide is added and heated at 80 to 90° C. for reaction; sodium hydroxide solution is then added dropwise for reaction; the mixture is concentrated to obtain GE-VAN-AP; III. Preheated asphalt is mixed with a polyetheramine curing agent and a polyetheramine accelerator to form component A; GE-VAN-AP is melted as component B; the component A is evenly mixed with the component B to obtain a renewable epoxy asphalt material. During the regeneration, the resin phase structure in the epoxy asphalt is gradually depolymerized, whereby asphalt regenerant is used to restore the properties of the aged asphalt phase and reshape the resin phase structure to complete the regeneration.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: January 16, 2024
    Assignee: Harbin Institute of Technology
    Inventors: Junyan Yi, Wenyi Zhou, Decheng Feng, Zhongshi Pei, Pengjian Cheng, Xinman Ai
  • Publication number: 20220089832
    Abstract: Disclosed is a preparation method of a renewable epoxy asphalt material and a regeneration process. The preparation method comprises: I Vanillin and 4-aminophenol are reacted in water with stirring to obtain VAN-AP; II. VAN-AP is mixed with epichlorohydrin, to which tetrabutylammonium bromide is added and heated at 80 to 90° C. for reaction; sodium hydroxide solution is then added dropwise for reaction; the mixture is concentrated to obtain GE-VAN-AP; III. Preheated asphalt is mixed with a polyetheramine curing agent and a polyetheramine accelerator to form component A; GE-VAN-AP is melted as component B; the component A is evenly mixed with the component B to obtain a renewable epoxy asphalt material. During the regeneration, the resin phase structure in the epoxy asphalt is gradually depolymerized, whereby asphalt regenerant is used to restore the properties of the aged asphalt phase and reshape the resin phase structure to complete the regeneration.
    Type: Application
    Filed: March 19, 2021
    Publication date: March 24, 2022
    Applicant: Harbin Institute of Technology
    Inventors: Junyan Yi, Wenyi Zhou, Decheng Feng, Zhongshi Pei, Pengjian Cheng, Xinman Ai