Vinyl alcohol-based polymer and film containing the same

Details Vinyl alcohol-based polymer and film containing the same Vinyl alcohol-based polymer and film containing the same

2009-08-25

2011-12-13

Choi, Ling (Department: 1763)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S319000

Reexamination Certificate

active

08076433

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.

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STIC EIC search.
Supplementary European Search Report issued Sep. 29, 2010 in Application No. 09 809 896 filed Aug. 25, 2009.
Supplementary European Search Report issued Sep. 29, 2010 in Application No. 09 809 896.5 filed Aug. 25, 2009.

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