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US 2003/0114566 A1Published application
Polyvinyl alcohol film and polarizing film
AssigneeKuraray Co., Ltd.
InventorsTetsushi Hayashi, Takanori Isozaki, Naoki Fujiwara
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Abstract
The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of α-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.
Claims14
A polyvinyl alcohol film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of α-olefin units having at most 4 carbon atoms.
Dependencies are inferred from the claim text.