Title:
POLYIMIDE POWDER HAVING CONTROLLED PARTICLE SIZE AND METHOD FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO/2022/114375
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing polyimide powder and, more specifically, to a method for preparing polyimide powder, comprising the steps of: a) dispersing dianhydride and diamine in distilled water to prepare a dispersion; and b) introducing the dispersion of step a) into a reactor and reacting at a stirring speed of 300 rpm or more under temperature and pressure conditions. In the present invention, water-based polymerization is used and the stirring speed is controlled during the manufacturing process, thereby improving physical properties, controlling the particle size, and controlling the dispersibility, without an additional process.
Inventors:
LEE HO SUNG (KR)
LEE IK SANG (KR)
JEON JIN SEOK (KR)
LEE IK SANG (KR)
JEON JIN SEOK (KR)
Application Number:
PCT/KR2020/019235
Publication Date:
June 02, 2022
Filing Date:
December 28, 2020
Export Citation:
Assignee:
PI ADVANCED MAT CO LTD (KR)
International Classes:
C08J3/12; C08G73/10
Foreign References:
| KR20160096565A | 2016-08-16 | |||
| KR20160039613A | 2016-04-11 | |||
| KR20110108898A | 2011-10-06 | |||
| US20170088746A1 | 2017-03-30 | |||
| CN108948352A | 2018-12-07 |
Attorney, Agent or Firm:
KIM, Bo Jung (KR)
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