Title:
POLYVINYL ALCOHOL-BASED POLYMER
Document Type and Number:
WIPO Patent Application WO/2019/163739
Kind Code:
A1
Abstract:
Provided is a polyvinyl alcohol-based polymer useful for a polarizing film, etc. The syndiotacticity of the polyvinyl alcohol polymer is 54.0-56.0 mol%, and the content of a vinyl alcohol unit is 98-100 mol%.
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Inventors:
KANESATO SHUHEI (JP)
KAWANISHI MASATOSHI (JP)
KAWANISHI MASATOSHI (JP)
Application Number:
PCT/JP2019/005989
Publication Date:
August 29, 2019
Filing Date:
February 19, 2019
Export Citation:
Assignee:
JAPAN VAM & POVAL CO LTD (JP)
International Classes:
C08F16/06; C08F8/12; C08J5/18; C08L29/04; G02B5/30
Foreign References:
| JPH052109A | 1993-01-08 | |||
| EP2097563B1 | 2011-10-19 |
Other References:
HAN, M. H. ET AL.: "Preparation of Syndiotacticity-Rich High Molecular Weight Poly(vinyl alcohol)/Iodine Polarizing Film with High Water Resistance", JOURNAL OF APPLIED POLYMER SCIENCE, vol. 115, 2010, pages 917 - 922, XP055631833
CHIROWODZA, H. ET AL.: "Effect of Vinyl Pivalate/Vinyl Acetate Comonomer Composition on the Self-Assembled Morphology of Poly (vinyl alcohol) Prepared by In situ Fibrillation: Preparation of PVA with a Spherical Morphology", JOURNAL OF APPLIED POLYMER SCIENCE, vol. 117, 2010, pages 3460 - 3465, XP055631840
YEUM, J. H. ET AL.: "Effect of syndiotacticity on the morphology of water-soluble low molecular weight poly(vinyl alcohol) by solution copolymerization of vinyl pivalate/vinyl acetate in tetrahydrofuran and saponification", POLYMER, vol. 45, 2004, pages 4037 - 4043, XP004508688, doi:10.1016/j.polymer.2004.03.077
CHIROWODZA, H. ET AL.: "Effect of Vinyl Pivalate/Vinyl Acetate Comonomer Composition on the Self-Assembled Morphology of Poly (vinyl alcohol) Prepared by In situ Fibrillation: Preparation of PVA with a Spherical Morphology", JOURNAL OF APPLIED POLYMER SCIENCE, vol. 117, 2010, pages 3460 - 3465, XP055631840
YEUM, J. H. ET AL.: "Effect of syndiotacticity on the morphology of water-soluble low molecular weight poly(vinyl alcohol) by solution copolymerization of vinyl pivalate/vinyl acetate in tetrahydrofuran and saponification", POLYMER, vol. 45, 2004, pages 4037 - 4043, XP004508688, doi:10.1016/j.polymer.2004.03.077
Attorney, Agent or Firm:
IWATANI, Ryo (JP)
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