公开(公告)号：US11286334B2

公开(公告)日：2022-03-29

申请号：US16788519

申请日：2020-02-12

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jong Hyuk Park ,  Min Park ,  Tae Ann Kim ,  Jongwon Kim ,  Sung Min Jee

IPC: C07B61/00 ,  C07C277/00 ,  C07D247/02 ,  C08G59/24 ,  C08G59/50 ,  C09J163/00

Abstract: A method for preparing a latent hardener includes, in the order recited, introducing a hardener into a dry mixer that is a high-energy-type mixer; injecting carbon dioxide gas or an inert gas into the dry mixer; and mechanochemically deactivating only a surface of the hardener using the dry mixer. The hardener may be an amine-based adduct, an imidazole-based adduct, dicyandiamide, a dihydride-based compound, a dichlorophenyl dimethylurea compound and combinations thereof. The inert gas may be helium, nitrogen, argon, neon, krypton, and combinations thereof.