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US 2003/0190491 A1Published application
K-type polarizer and preparation thereof
Assignee3M Innovative Properties Company
InventorsTodd D. Jones, Duane D. Fansler, Robert T. Fitzsimons JR., Wayne S. Mahoney, Kevin M. Lewandowski, Michael S. Wendland, Babu N. Gaddam
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Abstract
A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
Claims42
A pre-polarizing article comprising:
- an oriented vinylalcohol polymer film layer, and
- an acid donor layer comprising a thermal acid generator, wherein said thermal acid generator has an activation temperature of 200° C. or less.
Dependencies are inferred from the claim text.