Patent ID: 8449970

Claim:
An article comprising: A) a substrate; and B) an antistatic layer disposed on the substrate, the antistatic layer comprising: a) a cationic copolymer consisting essentially of: i) from about 20 to less than 70 wt % of a cationic monomer having the formula: CH 2 ═CR 1 COZ(CH 2 ) n N(R 2 ) 3 X wherein Z is O, S, or NH; R 1 is H or CH 3 ; R 2 independently comprises an alkyl group having from 1 to 4 carbon atoms; X is an anion selected from the group consisting of halogen, nitrate, alkylsulfate, alkanesulfonate, and haloalkanesulfonate; and n=2 to 6; and ii) from about 10 to about 75 wt % of a hydrophobic monomer comprising an aliphatic alkyl (meth)acrylate monomer having a hydrocarbon group of from 1 to 12 carbon atoms; and iii) from about 2 to about 25 wt % of a crosslinkable monomer having the formula: CH 2 ═CR 3 Y wherein R 3 is H or CH 3 ; and Y is selected from the group consisting of CO 2 M, L-CO 2 M, L-OH, and CONH 2 , wherein M is H or a counterion, and L is a divalent linking group comprising alkylene, arylene, heteroalkylene, ether, carbonyl, ester, amido, or sulfonamido functionality, or a combination thereof; b) a non-cationic (meth)acrylic polymer which comprises no monomer with —OH or —CO 2 H functional groups; and c) a crosslinking agent selected from the group consisting of melamine-formaldehyde, urea-formaldehyde, glycoluril-formaldehyde, aziridine, carbodiimide, isocyanate, and epoxy crosslinkers.