Title:
RETARDATION FILM AND APPLICATIONS THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/140927
Kind Code:
A1
Abstract:
A retardation film according to the present invention is formed by combining a polyester resin exhibiting negative orientation birefringence and with a phase difference exhibiting normal wavelength dispersibility, and a polyamide resin exhibiting positive orientation birefringence and with a phase difference exhibiting a flat dispersibility. The polyester resin includes a constituent unit having a fluorene-9,9-diyl group, and the polyamide resin may include a constituent unit having an alicyclic skeleton. The polyester resin may include at least one type of constituent unit selected from a fluorenedicarboxylic acid unit (A1) including a unit represented by formula (1), and a fluorenediol unit (B1) including a unit represented by formula (2). (In the formulas, R1 and R2 denote substituent groups, k and m are integers of 0-8, X1a, X1b, X2a, and X2b denote hydrocarbon groups, A1a and A1b denote alkylene groups, and n1 and n2 are integers of 0 or higher.) The retardation film exhibits both high phase difference expressibility and reverse wavelength dispersibility.
Inventors:
OTA YOSHIYA (JP)
KAMEI SHINICHI (JP)
MASUDA NAGAYOSHI (JP)
KAMEI SHINICHI (JP)
MASUDA NAGAYOSHI (JP)
Application Number:
PCT/JP2020/048351
Publication Date:
July 15, 2021
Filing Date:
December 24, 2020
Export Citation:
Assignee:
OSAKA GAS CHEMICALS CO LTD (JP)
International Classes:
B32B27/34; B32B27/36; C08G63/18; C08L67/00; C08L77/00; G02B5/30; G02F1/13363; H01L27/32; H01L51/50; H05B33/02
Foreign References:
| JP2016501384A | 2016-01-18 | |||
| JP2017198956A | 2017-11-02 | |||
| KR20160038271A | 2016-04-07 | |||
| KR20150108263A | 2015-09-25 | |||
| KR20150037440A | 2015-04-08 | |||
| JP2011137861A | 2011-07-14 | |||
| JP2007193045A | 2007-08-02 |
Attorney, Agent or Firm:
KUWATA Mitsuo et al. (JP)
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