Patent ID: 7524542

Claim:
A negative C-plate optical anisotropic film comprising a polycycloolefin, wherein the polycycloolefin comprises repeating units derived from compounds represented by the following Chemical Formula 1, and wherein the optical anisotropic film has a retardation value (R th ), defined by the following Equation 1, of 30 to 1000 nm when the film thickness is 30 to 200 μm: R th =Δ( n y −n z )× d Equation 1 wherein n y is the in-plane refractive index along the transverse direction or along the fast axis measured at a wavelength of 550 nm; n z is the refractive index along the thickness direction measured at a wavelength of 550 nm; and d is the film thickness: wherein m is an integer from 0 to 4; at least one of R 1 , R 2 , R 3 and R 4 is a polar functional group, the remaining are non-polar functional groups, and R 1 , R 2 , R 3 and R 4 can be bonded together to form a C 1 to C 10 alkylidene group, a C 4 to C 12 saturated or unsaturated cyclic group, or a C 6 to C 24 aromatic cyclic compound, the non-polar functional group is selected from the group consisting of hydrogen; a halogen; a C 1 to C 20 straight or branched alkyl, alkenyl or vinyl; a C 4 to C 12 cycloalkyl substituted by a hydrocarbon or unsubstituted; a C 6 to C 40 aryl substituted by a hydrocarbon or unsubstituted; a C 7 to C 15 aralkyl substituted by a hydrocarbon or unsubstituted; and a C 3 to C 20 alkynyl; the polar functional group is selected from the group consisting of a C 1 to C 20 linear or branched haloalkyl, haloalkenyl or halovinyl; a C 4 to C 12 halocycloalkyl substituted by a hydrocarbon or unsubstituted; a C 6 to C 40 haloaryl substituted by a hydrocarbon or unsubstituted; a C 7 to C 15 haloaralkyl substituted by a hydrocarbon or unsubstituted; a C 3 to C 20 haloalkynyl; and non-hydrocarbonaceous polar group selected from the group consisting of following formulae, wherein each R 5 is a C 1 to C 20 linear or branched alkyl, haloalkyl, alkenyl, haloalkenyl, vinyl, halovinyl; a C 4 to C 12 cycloalkyl or halocycloalkyl substituted by a hydrocarbon or unsubstituted; a C 6 to C 40 aryl or haloaryl substituted by a hydrocarbon or unsubstituted; a C 7 to C 15 aralkyl or haloaralkyl substituted by a hydrocarbon or unsubstituted; or a C 3 to C 20 alkynyl or haloalkynyl, each of R 6 and R 7 is hydrogen; a halogen; a C 1 to C 20 linear or branched alkyl, haloalkyl, alkenyl, haloalkenyl, vinyl, halovinyl, alkoxy, haloalkoxy, carbonyloxy, halocarbonyloxy; a C 4 to C 12 cycloalkyl or halocycloalkyl substituted by a hydrocarbon or unsubstituted; a C 6 to C 40 aryl, haloaryl, aryloxy, or haloaryloxy substituted by a hydrocarbon or unsubstituted; a C 7 to C 15 aralkyl or haloaralkyl substituted by a hydrocarbon or unsubstituted; a C 3 to C 20 alkynyl or haloalkynyl, and p is an integer of 1 to 10.