Patent ID: 8304086

Claim:
A polarizing plate comprising: a polarizing film having first and second outer surfaces; and a companion film supported on, or adjacent to, at least one of said first and second outer surfaces, said companion film comprising a cellulose crosslinked with a crosslinking agent, said cellulose being selected from the group consisting of cellulose ethers and cellulose esters, and said crosslinking agent having the formula wherein: each X is individually selected from the group consisting of phenyl groups and —NR 2 , where each R is individually selected from the group consisting of hydrogen, alkoxyalkyl groups, carboxyl groups, alkoxy groups, and hydroxymethyl groups; and at least one X being —NR 2 and at least one R being selected from the group consisting of alkoxyalkyl groups, carboxyl groups, alkoxy groups, and hydroxymethyl groups.