| abstract |
Provided is a resin composition for a secondary coating of an optical fiber, the resin composition comprising a non-reactive urethane compound having a number-average molecular weight of 10,000-50,000, inclusive, a photopolymerizable compound, and a photopolymerization initiator. The content of the non-reactive urethane compound is 0.05-5 parts by mass, inclusive, based on the total amount of the resin composition, and the non-reactive urethane compound is a reaction product of a polyol having a number-average molecular weight of 8,000-20,000, inclusive, a diisocyanate, and a compound having an active hydrogen. |