Optical film having excellent impact resistance and bending properties and display device comprising same

An optical film comprising:

• a light-transmitting matrix;
• and
• a buffer layer,
• wherein the light-transmitting matrix includes a polymer resin,
• wherein the buffer layer comprises a urethane acrylate siloxane resin,
• wherein the urethane acrylate siloxane resin comprises:
• a urethane acrylate silane compound represented by the following Formula 1;
• an alkoxysilane compound represented by the following Formula 2;
• and
• a diol compound represented by the following Formula 3:
• wherein R1 is a functional group derived from a C1-C8 aliphatic or aromatic hydrocarbon, R2 and R3 are each independently a C1-C6 linear, branched, or alicyclic alkylene group, R4 is an acrylate group or methacrylate group, and n is an integer of 1 to 3,
• R5mSi(OR6)4-m [Formula 2]
• wherein R5 and R6 are each independently a functional group derived from a C1-C8 aliphatic or aromatic hydrocarbon, and m is an integer of 0 to 3,
• HO—R7—OH [Formula 3]
• wherein R7 is a functional group derived from a C1-C6 aliphatic or aromatic hydrocarbon,
• wherein the urethane acrylate siloxane resin comprises the urethane acrylate silane compound represented by Formula 1 and the alkoxysilane compound represented by Formula 2 at a molar ratio of 9:1 to 5:5,
• wherein the optical film having a maximum restoration length of 40 mm to 100 mm,
• wherein when winding a sample for measurement having a width of 50 mm and a length of 100 mm, obtained from the optical film, on a cylinder having a diameter of 10 mm in a vertical direction, fixing the sample thereon, allowing the sample to stand at 60° C./90 RH % for 24 hours, removing the sample from the cylinder, and allowing the sample to stand on a flat surface at 25° C./50 RH % for 24 hours, if the sample viewed in the vertical direction from the flat surface has a shape of a circle, one end of which contacts the other end, the maximum restoration length is defined as a maximum diameter of the circle, and if the sample has a shape of an arc, one end of which does not contact the other end, the maximum restoration length is defined as a maximum diameter of the arc.