Title:
POLYVINYL ALCOHOL AND METHOD FOR PRODUCING POLYVINYL ALCOHOL
Document Type and Number:
WIPO Patent Application WO/2019/013267
Kind Code:
A1
Abstract:
A polyvinyl alcohol which has a number average molecular weight (Mn) of 4,400 to 440,000, a molecular weight distribution (Mw/Mn) of 1.05 to 1.70 and a degree of saponification of 80 to 99.99 mol%, and has a terminal group represented by formula (I), wherein the molar ratio (X) of the terminal group relative to the whole amount of all of monomer units and the number average molecular weight (Mn) satisfy the requirement represented by formula (1). The polyvinyl alcohol has a narrow molecular weight distribution, a large number average molecular weight and good hue. (In the formula, R1 represents an aromatic group which has 6 to 20 carbon atoms and may have a substituent; and R2 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aromatic group which has 6 to 20 carbon atoms and may have a substituent.) X·Mn/44 ≥ 0.5 (1)
Inventors:
TAKAYAMA TAKUMI (JP)
MAEKAWA KAZUHIKO (JP)
DETREMBLEUR CHRISTOPHE (BE)
DEBUIGNE ANTOINE (BE)
JEROME CHRISTINE (BE)
MAEKAWA KAZUHIKO (JP)
DETREMBLEUR CHRISTOPHE (BE)
DEBUIGNE ANTOINE (BE)
JEROME CHRISTINE (BE)
Application Number:
PCT/JP2018/026233
Publication Date:
January 17, 2019
Filing Date:
July 11, 2018
Export Citation:
Assignee:
KURARAY CO (JP)
UNIV LIEGE (BE)
UNIV LIEGE (BE)
International Classes:
C08F8/12; C08F16/06
Domestic Patent References:
| WO2017170974A1 | 2017-10-05 |
Foreign References:
| JP2007308665A | 2007-11-29 | |||
| JPH0693016A | 1994-04-05 | |||
| JP2001019770A | 2001-01-23 | |||
| JPS5433589A | 1979-03-12 | |||
| JPH11147914A | 1999-06-02 |
Other References:
"Controlled/Living Radical Polymerization of Vinyl Acetate by Degenerative Transfer with Alkyl Iodides", MACROMOLECULES, vol. 36, 2003, pages 9346 - 9354
"Highly Efficient Cobalt-Mediated Radical Polymerization of Vinyl Acetate", ANGEWANDTE CHEMIE INTERNATIONAL EDITION, vol. 44, 2005, pages 1101 - 1104
"Synthesis of End-Functional Poly(vinyl acetate) by Cobalt-Mediated Radical Polymerization", MACROMOLECULES, vol. 38, 2005, pages 5452 - 5458
See also references of EP 3653652A4
"Highly Efficient Cobalt-Mediated Radical Polymerization of Vinyl Acetate", ANGEWANDTE CHEMIE INTERNATIONAL EDITION, vol. 44, 2005, pages 1101 - 1104
"Synthesis of End-Functional Poly(vinyl acetate) by Cobalt-Mediated Radical Polymerization", MACROMOLECULES, vol. 38, 2005, pages 5452 - 5458
See also references of EP 3653652A4
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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