公开(公告)号：US20170226247A1

公开(公告)日：2017-08-10

申请号：US15519192

申请日：2015-10-16

Applicant: KURARAY CO., LTD.

Inventor： Yosuke KUMAKI ,  Ayumu YAMAMOTO ,  Tatsuya TANIDA

IPC: C08F216/06 ,  D21H19/20 ,  D21H27/00 ,  C09J7/04 ,  C09D129/04

CPC classification number: C08F216/06 ,  C08F16/06 ,  C09D129/04 ,  C09J7/201 ,  C09J7/21 ,  C09J2400/28 ,  C09J2429/005 ,  C09J2483/00 ,  D21H19/20 ,  D21H27/00 ,  D21H27/001

Abstract: There is provided a vinyl alcohol-based polymer having an ethylenic double bond with a saponification degree of 70 mol % or more, wherein the vinyl alcohol-based polymer is water-soluble; a molar ratio of the ethylenic double bond to the total of vinyl alcohol units and vinyl acetate units is 0.05/100 to 2/100; and a limiting viscosity [η] and a weight-average molecular weight Mw of a vinyl ester-based polymer which is produced by esterifying the vinyl alcohol-based polymer satisfy the following formulas (1) and (2). 4.7≦log Mw 6.3   (1) 0.60