A resin composition which can be used as filling material to seal the organic EL device by the dam aenpil method, coatability and the acetone solubility can excellent, and set the timing of the thickening and hardening Optionally, the high-refractive-index, low moisture permeability and low outgassing It provides a resin composition capable of forming a cured product having a castle.
The resin composition of the present invention, the following formula (a) is compound (A) and the following formula (b-1) a compound represented by, and the formula (b-2) at least one selected from compounds represented by the represented by and a compound (B) and a photo cationic polymerization initiator (C) of the species.