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1. (WO2018021274) POLARIZING FILM AND PRODUCTION METHOD THEREFOR

Pub. No.:    WO/2018/021274    International Application No.:    PCT/JP2017/026789
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Wed Jul 26 01:59:59 CEST 2017
IPC: G02B 5/30
C08K 5/55
C08L 29/04
Applicants: KURARAY CO., LTD.
株式会社クラレ
Inventors: OHASHI, Wataru
大橋 亘
ISOZAKI, Takanori
磯▲ざき▼ 孝徳
YOSHIMOTO, Junichi
吉本 純一
OZONO, Tatsuya
大園 達也
Title: POLARIZING FILM AND PRODUCTION METHOD THEREFOR
Abstract:
Provided is a polarizing film which comprises polyvinyl alcohol (A) and a boron-containing compound (B) having at least one functional group selected from the group consisting of a boronic acid group and boron-containing groups capable of being converted into a boronic acid group in the presence of water, and which is characterized in that the contained amount of elemental boron derived from the boron-containing compound (B) in the polarizing film is 0.1-3 parts by mass with respect to 100 parts by mass of the polyvinyl alcohol (A). It is preferable that boronic acid is further included, and that the total contained amount of elemental boron in the polarizing film is 0.2-5 mass%. This configuration provides a polarizing film that exhibits excellent moist-heat resistance performance.