Patent Number: 7,087,194

Title: K-type polarizer and preparation thereof

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.

Inventors: Jones; Todd D. (Saint Paul, MN), Fansler; Duane D. (Dresser, WI), Fitzsimons, Jr.; Robert T. (Minneapolis, MN), Mahoney; Wayne S. (Saint Paul, MN), Lewandowski; Kevin M. (Inver Grove Heights, MN), Wendland; Michael S. (North Saint Paul, MN), Gaddam; Babu N. (Woodbury, MN)

Assignee: 3M Innovative Properties Company

International Classification: F21V 9/14 (20060101); G02B 27/02 (20060101); G02B 27/28 (20060101)

Expiration Date: 8/08/02018