Title:
POLYVINYL ALCOHOL AND PAPER COATING AGENT CONTAINING SAME
Document Type and Number:
WIPO Patent Application WO/2014/192773
Kind Code:
A1
Abstract:
A polyvinyl alcohol in which the degree of saponification is 50-99.99 mol%, the viscosity-average degree of polymerization is 200-5000, and the alkali metal salt content in a carboxylic acid is 0.5% by mass or less in terms of the mass of the alkali metal, the peak top molecular weight (A) measured by a differential refractometer and the peak top molecular weight (B) measured by an absorption detector (measurement wavelength: 280 nm) satisfying formula (1) ((A - B)/A < 0.75) when the polyvinyl alcohol heated for three hours at 120°C is measured by gel permeation chromatography, and the absorbance at the peak top molecular weight (B) being 0.25×10-3 to 3.00×10-3. A polyvinyl alcohol is thereby provided having minimal heating-induced discoloration and excellent effects for enhancing water dispersibility of organic particles or inorganic particles.
Inventors:
KUSUDOU TAKESHI (JP)
ASANUMA YOSHIAKI (JP)
FUJIOKA SHUNSUKE (JP)
TSUJI YOSHIHISA (JP)
ASANUMA YOSHIAKI (JP)
FUJIOKA SHUNSUKE (JP)
TSUJI YOSHIHISA (JP)
Application Number:
PCT/JP2014/064030
Publication Date:
December 04, 2014
Filing Date:
May 27, 2014
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
C08F8/12; C08F16/06; D21H19/60
Foreign References:
| JP2003105154A | 2003-04-09 | |||
| JP2000309607A | 2000-11-07 | |||
| JP2012067145A | 2012-04-05 | |||
| JPH11181158A | 1999-07-06 | |||
| JPH09272774A | 1997-10-21 |
Attorney, Agent or Firm:
NAKATSUKASA, Shigeki et al. (JP)
Shigeki Nakamu (JP)
Shigeki Nakamu (JP)
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