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Patent Searching and Data


Title:
POLARIZING FILM AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2020/262516
Kind Code:
A1
Abstract:
A polarizing film according to the present invention includes: polyvinyl alcohol (A); at least one boron-containing compound (B) selected from the group consisting of a compound which can be converted into monoboronic acid in the presence of water and the monoboronic acid as represented in expression (I) below; and at least one boron-containing compound (C) selected from the group consisting of a compound which can be converted into diboronic acid in the presence of water and the diboronic acid as represented in expression (II) below, wherein the mass ratio (B/C) of the elemental boron derived from the boron-containing compound (B) to the elemental boron derived from the boron-containing compound (C) is 4.0-8.0, and the elemental boron content derived from the boron-containing compound (C) is 0.05-0.3 parts by mass to 100 parts by mass of the polyvinyl alcohol (A). The polarizing film has a small contracting force at high temperatures and outstanding moisture and heat resistance. [In expression (I), R1 is a monovalent aliphatic group having a carbon number of 1-20, and R1 and the boronic acid group are linked by a boron-carbon bond.] [In expression (II), R2 is a bivalent aliphatic group having a carbon number of 1-20, and R2 and the boronic acid group are linked by a boron-carbon bond.]

Inventors:
OHASHI WATARU (JP)
TSUJI YOSHIHISA (JP)
Application Number:
PCT/JP2020/024960
Publication Date:
December 30, 2020
Filing Date:
June 25, 2020
Export Citation:
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Assignee:
KURARAY CO (JP)
International Classes:
G02B5/30
Foreign References:
JP2019015926A2019-01-31
JP2018180022A2018-11-15
KR20140075154A2014-06-19
KR20160054229A2016-05-16
KR20150001276A2015-01-06
KR20150052777A2015-05-14
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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