Title:
ポリビニルアルコール及びその製造方法
Document Type and Number:
Japanese Patent JPWO2017170974
Kind Code:
A1
Abstract:
ラジカル開始剤及び有機コバルト錯体の存在下に制御ラジカル重合によってビニルエステル単量体を重合してポリビニルエステルを含むポリマー溶液を得る重合工程；前記ポリマー溶液を、水溶性配位子を含む水溶液に接触させて、前記ポリマー溶液からコバルト錯体を抽出する抽出工程；及び、前記抽出工程後のポリビニルエステルをけん化してポリビニルアルコールを得るけん化工程；を行って、ポリビニルアルコールを製造する。これにより、分子量分布が狭く、数平均分子量が高く、しかも色相が良好であり、さらに水への溶解性も良好であるポリビニルアルコールの製造方法が提供される。
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Inventors:
Takayama Takumi
Yusuke Amano
Kazuhiko Maekawa
Detren Blur, Christoph
Debuigne, Antoine
Jerome, Christine
Yusuke Amano
Kazuhiko Maekawa
Detren Blur, Christoph
Debuigne, Antoine
Jerome, Christine
Application Number:
JP2018509491A
Publication Date:
February 07, 2019
Filing Date:
March 30, 2017
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
C08F8/12; C08F18/04
Domestic Patent References:
| JPH11147914A | 1999-06-02 | |||
| JP2007002232A | 2007-01-11 |
Foreign References:
| WO2011118598A1 | 2011-09-29 |
Other References:
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Attorney, Agent or Firm:
Setouchi International Patent Firm