Title:
POLYIMIDE PRECURSOR COMPOSITION, METHOD OF PREPARING SAME, AND POLYIMIDE FILM USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/040495
Kind Code:
A1
Abstract:
The present invention prepares a polyimide precursor composition by a method comprising the steps of: in an organic solvent with a positive value of partition coefficient LogP, conducting a first polymerization of a diamine comprising diaminodiphenyl sulfone (DDS) and amine-terminated methylphenyl siloxane oligomer, and a polymerization component comprising two or more types of tetracarboxylic acid dianhydrides; and adding an organic solvent with a negative value of LogP to a first polymerization solution, thereby conducting a second polymerization. The precursor composition prepared by the method according to the present invention can provide a polyimide film with a minimized liquid drying problem and an improved heat resistance.
Inventors:
YUN CHEOLMIN (KR)
HONG YE JI (KR)
HONG YE JI (KR)
Application Number:
PCT/KR2019/010460
Publication Date:
February 27, 2020
Filing Date:
August 19, 2019
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08G73/10; C08J5/18; C08K5/5415; C08K5/544; G02F1/1333
Domestic Patent References:
| WO2017111299A1 | 2017-06-29 |
Foreign References:
| KR101840978B1 | 2018-03-21 | |||
| US20150299513A1 | 2015-10-22 | |||
| KR101840977B1 | 2018-03-21 |
Other References:
MATSUMOTO, T. ET AL.: "Properties of alicyclic polyimides with bis-spironorbornane structure prepared in various solvents", JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY, vol. 29, 2016, pages 237 - 242, XP055688627, ISSN: 0914-9244, DOI: 10.2494/photopolymer.29.237
Attorney, Agent or Firm:
KIM, Aera (KR)
Download PDF: