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Patent Searching and Data


Title:
POLYIMIDE-BASED POLYMER FILM, AND SUBSTRATE FOR DISPLAY DEVICE AND OPTICAL DEVICE, EACH USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/055235
Kind Code:
A1
Abstract:
The present invention relates to a polyimide-based polymer film, and a display device substrate and an optical device, each using same, wherein the polyimide-based polymer film includes a polyimide-based resin a polyimide repeat unit synthesized by a reaction between an acid anhydride compound of a specific structure and a diamine compound and has a glass transition temperature of 400℃ or higher and a phase difference value of 150 nm or less at the thickness of 10 ㎛ in the thickness direction.

Inventors:
LEE MIN WOOK (KR)
KIM KYUNGHWAN (KR)
PARK CHAN HYO (KR)
Application Number:
PCT/KR2021/012174
Publication Date:
March 17, 2022
Filing Date:
September 08, 2021
Export Citation:
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Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C08J5/18; C08G73/10; G02B1/04
Foreign References:
KR20170076101A2017-07-04
KR101796875B12017-11-10
JP2010235641A2010-10-21
JP2013001899A2013-01-07
KR20180081434A2018-07-16
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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