Title:
METHOD FOR PRODUCING PATTERNED SINGLE-LAYER RETARDATION MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/090832
Kind Code:
A1
Abstract:
The present invention provides a method for producing a patterned single-layer retardation material, said method comprising: (I) a step for forming a coating film by applying a polymer composition onto a substrate, said polymer composition containing a liquid crystalline polymer having properties such that the alignability increases as the amount of light exposure increases if the amount of light exposure is less than the optimal amount of light exposure, while the alignability decreases as the amount of light exposure increases if the amount of light exposure is more than the optimal amount of light exposure; (II) a step for irradiating the coating film obtained in the step (I) with ultraviolet light twice, namely at least once via a mask and at least once with use of polarized ultraviolet light so that a high anisotropy region having high optical anisotropy is produced by being irradiated with polarized ultraviolet light and a low anisotropy region having relatively low optical anisotropy is produced due to deficient ultraviolet light in a region where the amount of light exposure is less than the optimal amount of light exposure and due to excessive ultraviolet light in a region where the amount of light exposure is more than the optimal amount of light exposure; and (III) a step for obtaining a retardation material by heating the coating film obtained in the step (II).
Inventors:
FUJIEDA TSUKASA (JP)
NEGI TAKAYUKI (JP)
NEGI TAKAYUKI (JP)
Application Number:
PCT/JP2020/041189
Publication Date:
May 14, 2021
Filing Date:
November 04, 2020
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
International Classes:
C08F246/00; G02B5/30; G02F1/13363
Domestic Patent References:
| WO2016002691A1 | 2016-01-07 | |||
| WO2014185410A1 | 2014-11-20 | |||
| WO2015199052A1 | 2015-12-30 | |||
| WO2020203628A1 | 2020-10-08 | |||
| WO2020111193A1 | 2020-06-04 |
Foreign References:
| JP2009223001A | 2009-10-01 | |||
| JP2013007887A | 2013-01-10 | |||
| JP2009298075A | 2009-12-24 |
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION EI-MEI PATENT OFFICE (JP)
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