Title:
POLARISING FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/226153
Kind Code:
A1
Abstract:
Provided is a polarising film including: a polyvinyl alcohol (A); at least one boron-containing compound (B) selected from the group comprising compounds which, in the presence of water and monoboronic acid represented by formula (I), can be converted into said monoboronic acid; and at least one boron-containing compound (C) selected from the group comprising compounds which, in the presence of water and diboronic acid represented by formula (II), can be converted into said diboronic acid, wherein the mass ratio (B/C) of the element boron derived from the boron-containing compound (B) to the element boron derived from the boron-containing compound (C) is 0.8-3.0, and the content of the element boron derived from the boron-containing compound (B) is 0.15-3.0 parts by mass in relation to 100 parts by mass of the polyvinyl alcohol (A). Said polarising film has a low contractile force at high temperature, as well as excellent optical performance and moisture/heat resistance. [In formula (I), R1 is a C1-20 monovalent aliphatic group, and R1 and the boronic acid group are linked by a boron-carbon bond.] [In formula (II), R2 is a C1-20 divalent aliphatic group, and R2 and the boronic acid groups are linked by a boron-carbon bond.]
Inventors:
OHASHI WATARU (JP)
TSUJI YOSHIHISA (JP)
TSUJI YOSHIHISA (JP)
Application Number:
PCT/JP2020/018525
Publication Date:
November 12, 2020
Filing Date:
May 07, 2020
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
G02B5/30; G02F1/1335
Foreign References:
| JP2019015926A | 2019-01-31 | |||
| JP2018180022A | 2018-11-15 | |||
| KR20140075154A | 2014-06-19 | |||
| KR20160054229A | 2016-05-16 | |||
| KR20150001276A | 2015-01-06 | |||
| KR20150052777A | 2015-05-14 |
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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