Title:
POLYIMIDE FILM HAVING IMPROVED ALKALI RESISTANCE AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2020/040347
Kind Code:
A1
Abstract:
The present invention provides a polyimide film manufactured by imidization of a precursor composition comprising: a first polyamic acid in which a first dianhydride and a first diamine bearing two or fewer benzene rings are polymerized; a second polyamic acid in which a second dianhydride and a second diamine bearing three or more benzene rings are polymerized; and carbon black, wherein, the polyimide film has: a degree of crystallinity of 65% or more; a light transmissivity of 0.09 or less; an alkali resistance index of 70% or greater as evaluated in terms of polyimide film thickness before and after exposure to an alkaline component; and a thickness of 8.0 ㎛ or less.
Inventors:
KIM KI HOON (KR)
LEE KIL NAM (KR)
CHOI JEONG YEUL (KR)
LEE KIL NAM (KR)
CHOI JEONG YEUL (KR)
Application Number:
PCT/KR2018/011539
Publication Date:
February 27, 2020
Filing Date:
September 28, 2018
Export Citation:
Assignee:
SKCKOLONPI INC (KR)
International Classes:
C08J5/18; C08G73/10; C08K3/04; C08L79/08; G02F1/1333; G02F1/361
Foreign References:
| KR20170114366A | 2017-10-16 | |||
| KR20130113778A | 2013-10-16 | |||
| KR100839760B1 | 2008-06-19 | |||
| KR20130003358A | 2013-01-09 | |||
| KR20170100792A | 2017-09-05 |
Attorney, Agent or Firm:
HANYANG PATENT FIRM (KR)
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