Title:
POLYVINYL ALCOHOL POLYMER AND MOLDED ARTICLE USING SAME
Document Type and Number:
WIPO Patent Application WO/2020/017417
Kind Code:
A1
Abstract:
Provided is a polyvinyl alcohol polymer that exhibits high strength when made into a molded article such as a film or gel. The present invention provides a polyvinyl alcohol polymer that has a degree of saponification of at least 98 mol%, the polyvinyl alcohol polymer being characterized by comprising a carboxylate salt structure and/or a carboxylic acid structure in a terminal position in a proportion of 0.003-0.015 mol% in the polyvinyl alcohol polymer.
Inventors:
YAMASHITA AKIHIRO (JP)
Application Number:
PCT/JP2019/027424
Publication Date:
January 23, 2020
Filing Date:
July 10, 2019
Export Citation:
Assignee:
DENKA COMPANY LTD (JP)
International Classes:
C08F118/08; C08F8/12; C08L29/04
Domestic Patent References:
WO2017170974A1 | 2017-10-05 |
Foreign References:
JPS61148209A | 1986-07-05 | |||
JP2003238227A | 2003-08-27 | |||
JPH06298847A | 1994-10-25 | |||
JP2000178396A | 2000-06-27 | |||
JPS6264807A | 1987-03-23 |
Other References:
W.S.LYOO ET AL.: "Synthesis of high-molecular-weight poly(vinyl alcohol) with high yield by novel one-batch suspension polymerization of vinyl acetate and saponification", COLLOID AND POLYMER SCIENCE, vol. 280, no. 9, 22 May 2002 (2002-05-22), pages 835 - 840, XP055675721
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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