Title:
POLYIMIDE PRECURSOR COMPOSITION AND POLYIMIDE FILM, SUBSTRATE FOR DISPLAY DEVICE, AND OPTICAL DEVICE, EACH MANUFACTURED THEREFROM
Document Type and Number:
WIPO Patent Application WO/2020/159193
Kind Code:
A1
Abstract:
The present invention provides a polyimide film having improved heat resistance and reflective indices, wherein the polyimide film is manufactured using a polyimide precursor composition which comprises the diamine of chemical formula 1 and the acid dianhydride of chemical formula 2 as polymeric components, whereby a difference in reflective index between the polyimide film and an upper layer can be reduced to improve the light emission efficiency.
Inventors:
SUNG JIYEON (KR)
LEE HOYONG (KR)
SONG CHEOL JUN (KR)
KIM KYUNGHWAN (KR)
KANG MI EUN (KR)
LEE HOYONG (KR)
SONG CHEOL JUN (KR)
KIM KYUNGHWAN (KR)
KANG MI EUN (KR)
Application Number:
PCT/KR2020/001291
Publication Date:
August 06, 2020
Filing Date:
January 28, 2020
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08G73/10; C08J5/18
Domestic Patent References:
| WO2017111300A1 | 2017-06-29 | |||
| WO2015152178A1 | 2015-10-08 |
Foreign References:
| CN108864426A | 2018-11-23 | |||
| KR20180096151A | 2018-08-29 | |||
| KR20180048605A | 2018-05-10 | |||
| KR101796875B1 | 2017-11-10 |
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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