Vinyl alcohol polymer and use thereof
AssigneeKuraray Co., Ltd.
InventorsYosuke Kumaki, Ayumu Yamamoto, Tatsuya Tanida
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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<(log [η]+3.75)/log Mw<0.69 (2)
Claims8
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 a 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 formulas (1) and (2):
- 4.7≤log Mw≤6.3 (1)
- 0.60<(log [η]+3.75)/log Mw<0.69 (2).
Dependencies are inferred from the claim text.