Title:
RETARDATION FILM AND PRODUCTION METHOD FOR RETARDATION FILM
Document Type and Number:
WIPO Patent Application WO/2019/181893
Kind Code:
A1
Abstract:
A retardation film including a lamellar phase-separating structure that: comprises a resin C including a copolymer P including a polymerization unit A and a polymerization unit B; and exhibits structural birefringence. The phase-separating structure: includes a phase (A) having as the main component thereof the polymerization unit A and a phase (B) having as the main component thereof the polymerization unit B; and fulfills formula (1A): f(A) > 0.5 and formula (2): D(A) > D(B) or formula (1B): f(B) > 0.5 and formula (2). f(A) indicates the total weight ratio of polymerization unit A in the copolymer P. f(B) indicates the total weight ratio of polymerization unit B in the copolymer P. D(A) = ReA(450)/ReA(550) and D(B) = Reb(450)/ReB(550). ReA(450), ReA(550), Reb(450), and ReB(550) are defined in the Specification.
Inventors:
ASADA TAKESHI (JP)
SUDEJI HIRONARI (JP)
FUJII KENSAKU (JP)
YASU YUSUKE (JP)
NISHIOKA HIROYA (JP)
SUDEJI HIRONARI (JP)
FUJII KENSAKU (JP)
YASU YUSUKE (JP)
NISHIOKA HIROYA (JP)
Application Number:
PCT/JP2019/011299
Publication Date:
September 26, 2019
Filing Date:
March 18, 2019
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
G02B5/30; B29C48/305; B29C55/04; C08F297/04; B29K25/00; B29L7/00; B29L11/00
Domestic Patent References:
| WO2015002020A1 | 2015-01-08 |
Foreign References:
| JP2006142561A | 2006-06-08 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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