Patent ID: 7989571

Claim:
A norbornene polymer comprising: a repeating unit that is represented by Formula 2 and contains an exo isomer in a content of 50 mol% or more: wherein m is an integer of 0 to 4, at least one of R 1 , R 2 , R 3 , and R 4 includes an acetate group, each of other R 1 , R 2 , R 3 , and R 4 is independently hydrogen; halogen; linear or branched alkyl, alkenyl, or vinyl having 1 to 20 carbon atoms; cycloalkyl that is unsubstituted or substituted with hydrocarbon and has 5 to 12 carbon atoms; aryl that is unsubstituted or substituted with hydrocarbon and has 6 to 40 carbon atoms; aralkyl that is unsubstituted or substituted with hydrocarbon and has 7 to 15 carbon atoms; alkynyl that has 2 to 20 carbon atoms; linear or branched haloalkyl, haloalkenyl, or halovinyl that has 1 to 20 carbon atoms; halocycloalkyl that is unsubstituted or substituted with hydrocarbon and has 5 to 12 carbon atoms; haloaryl that is unsubstituted or substituted with hydrocarbon and has 6 to 40 carbon atoms; haloaralkyl that is unsubstituted or substituted with hydrocarbon and has 7 to 15 carbon atoms; haloalkynyl that has 2 to 20 carbon atoms; or polar functional group containing at least one atom selected from the group consisting of oxygen, nitrogen, phosphorus, sulfur, silicon, and boron, and R 1 and R 2 , or R 3 and R 4 may be connected to form a C 1 to C 10 alkylidene group, or R 1 or R 2 may be connected with one of R 3 and R 4 to form a C 4 to C 12 saturated or unsaturated cyclic group or a C 6 to C 24 aromatic group, wherein the acetate group of Formula 2 is represented by —(CH 2 ) n —OC(O)R, n is an integer of 0 to 10, and R is an alkyl group having 1 to 20 carbon atoms, and wherein when n is 0, the content of the exo isomer in the repeating unit is 50 to 100 mol%, or when n is an integer of 1 to 10, the content of the exo isomer in the repeating unit is 50 to 90 mol%.