国家/地区 韩国（4） 世界知识产权组织（4）
IPC部 C（4）
IPC大类 C08（4）
IPC小类 C08L（4） C08G（3） C08J（3）
C08K（3） C01B（2）
IPC C08L079/08（4）
发明人 WON D Y（2）
公开年 2021（2） 2023（2）
申请年 2019（2）  2022（2） 
专利权人 PI ADVANCED MATERIALS CO LTD（4）

Producing polyimide powder used in display, automobile, medical, battery, and aerospace, involves preparing polyamic acid solution, preparing polyimide mixed solution by heating polyamic acid solution, and filtering and drying precipitate present in mixed solution to obtain polyimide powder.

LEE H S, YANG M S, LEE I S, LEE H, YANG M

Polyimide film is obtained by imidization reaction of polyamic acid containing quinoline and beta-picoline as imidation catalyst and acetic anhydride as dehydrating agent.

JUNG H, WON D, WON D Y

Graphite sheet useful for electronic device, has thermal conductivity in plane direction, and thermal conductivity in thickness direction.

KIM K S, WON D Y, CHOI J Y, CUI Z, YUAN D, JIN J

Producing polyimide powder useful for polyimide molded product, comprises dispersing dianhydride compound, diamine compound, and graphene powder in mixed solvent to prepare dispersion, introducing into reactor, and filtering and drying.

LEE K N, CHUN J, JEON J