Title:
ポリビニルアルコール及びポリビニルアルコールの製造方法
Document Type and Number:
Japanese Patent JP7149537
Kind Code:
B2
Abstract:
A polyvinyl alcohol has a number-average molecular weight (Mn) from 4,400 to 440,000, a molecular weight distribution (Mw/Mn) from 1.05 to 1.70, a degree of saponification from 80 to 99.99 mol%, wherein the polyvinyl alcohol contains an end group represented by a formula (I) below, and a molar ratio (X) of the end group based on total monomer units and the number-average molecular weight (Mn) satisfy a formula (1) below. Such a polyvinyl alcohol has a narrow molecular weight distribution and a high number-average molecular weight with hue good.(In the formula, R1denotes an optionally substituted aromatic group having a carbon number from 6 to 20, and R2denotes a hydrogen atom, an alkyl group having a carbon number from 1 to 20, or an optionally substituted aromatic group having a carbon number from 6 to 20.)X·Mn/44≥0.5
Inventors:
Takumi Takayama
Kazuhiko Maekawa
Detren Blur, Christoph
Debuigne, Antoine
Jerome, Christine
Kazuhiko Maekawa
Detren Blur, Christoph
Debuigne, Antoine
Jerome, Christine
Application Number:
JP2019529771A
Publication Date:
October 07, 2022
Filing Date:
July 11, 2018
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08F16/06; C08F2/38; C08F8/12
Domestic Patent References:
| JP2007308665A | ||||
| JP6093016A | ||||
| JP2001019770A | ||||
| JP54033589A |
Foreign References:
| WO2017170974A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Setouchi International Patent Firm