Resin composition for colored coating on optical fiber, optical fiber, and optical fiber ribbon

Abstract

A resin composition for colored coating on an optical fiber contains a photopolymerizable compound, a polydimethylsiloxane compound, a photopolymerization initiator, and titanium oxide, in which the photopolymerizable compound contains an epoxy di(meth)acrylate, a content of the epoxy di(meth)acrylate is 30 parts by mass or more and 75 parts by mass or less with respect to 100 parts by mass of the total amount of the photopolymerizable compound and the polydimethylsiloxane compound, and the polydimethylsiloxane compound has a dimethylsiloxane unit and an alkylene oxide unit, and a molar ratio of the dimethylsiloxane unit based on the total amount of the dimethylsiloxane unit and the alkylene oxide unit is 12% by mol or more and 80% by mol or less.

Dependencies are inferred from the claim text.