Resin composition

A resin composition comprising a first epoxy resin, a second epoxy resin, and a thermal curing agent,

• wherein when the resin composition is prepared as a film and is measured with a spectrometer in a wavelength range of 400 nm to 780 nm, the resin composition exhibits a transmittance of 90% or more and
• when the resin composition is measured with a refractometer, the resin composition exhibits a refractive index of 1.4 or more and
• wherein the first epoxy resin is a 2-4 functional epoxy resin,
• wherein the second epoxy resin is a 2-4 functional epoxy resin,
• wherein the resin composition comprises 10 to 30 parts by weight of the first epoxy resin and 70 to 90 parts by weight of the second epoxy resin, and the thermal curing agent comprises 0.5 to 1.4 parts by weight of the thermal curing agent,
• wherein the first epoxy resin comprises a compound represented by Chemical Formula 1 below,
• wherein in Chemical Formula 1,
• G1 is an organic group containing a glycidyl group,
• X1 and X2 are each independently hydrogen or a methyl group,
• R1 is a substituted or unsubstituted alkylene or alkenylene having 10 to 100 carbon atoms, and
• n is 10,
• m is an integer in the range of 0 to 1,
• wherein the second epoxy resin comprises an epoxy resin including a compound represented by Chemical Formula 2 below,
• wherein in Chemical Formula 2,
• G2 is an organic group containing a glycidyl group,
• X3 and X4 are each independently substituted or unsubstituted alkylene or alkenylene having 1 to 100 carbon atoms,
• k is an integer in the range of 1 to 10, and
• p and q are each independently an integer in the range of 0 to 10.