Patent ID: 8147966

Claim:
An optical display comprising: an optical substrate having a surface layer comprising the reaction product of a mixture comprising i) a hydrocarbon-based hardcoat composition; ii) at least one perfluoropolyether urethane having the formula: R i —(NHC(O)XQR f ) m ,—(NHC(O)OQ(A) p ) n ; wherein R i is the residue of a multi-isocyanate; X is O, S or NR, wherein R is H or an alkyl group having 1 to 4 carbon; R f is a monovalent perfluoropolyether moiety comprising groups of the formula F(R fc O) x C d F 2d —, wherein each R fc is independently a fluorinated alkylene group having from 1 to 6 carbon atoms, each x is an integer greater than or equal to 2, and wherein d is an integer from 1 to 6; each Q is independently a connecting group having a valency of at least 2; A is a (meth)acryl functional group —XC(O)C(R 2 )═CH 2 wherein R 2 is an alkyl group of 1 to 4 carbon atoms or H or F; m is at least 1; n is at least 1; p is 2 to 6; m+n is 2 to 10; wherein each group having subscripts m and n is attached to the R i unit.