Vinyl alcohol-based polymer and film containing the same
AssigneeKuraray Co., Ltd.
InventorsShinsuke Nii, Masato Nakamae, Makio Tokoh
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Abstract
Provided are a polyoxyalkylene modified vinyl alcohol-based polymer, including a polyoxyalkylene group in side chain, wherein the vinyl alcohol-based polymer has a viscosity average degree of polymerization P of from 200 to 5000, has a degree of saponification of from 20 to 99.99 mol %, and has an amount S of polyoxyalkylene modification of from 0.1 to 10 mol % and a film containing the same. By way of them, a polyvinyl alcohol-based polymer that is soluble in water and also high in viscosity, and a film that is less in a decrease of tensile elastic modulus when conditioned in high humidity, is excellent in water repellency on the film surface, and exhibits water solubility are provided.
Claims10
A polyoxyalkylene modified vinyl alcohol-based polymer, comprising:
- a polyoxyalkylene group according to general formula (I) as a side chain;
- wherein:
- R1 is a hydrogen atom or a methyl group;
- R2 is a hydrogen atom or an alkyl group having a carbon number of from 1 to 8;
- each of m and n is a number of repeating units of respective oxyalkylene units;
- 1≦m≦10;
- 3≦n≦20;
- the polymer has a viscosity average degree of polymerization P of from 200 to 5000;
- the polymer has a degree of saponification of from 20 to 99.99 mol %;
- and
- the polymer has an amount S of polyoxyalkylene modification of from 0.1 to 10 mol %.
Dependencies are inferred from the claim text.