Composition, adhesive, curing agent, and fiber array

Abstract

This invention provides a composition of a curable material with low refractive index and excellent heat resistance, an adhesive of a curable material with low refractive index and excellent heat resistance, a curable material with low refractive index and excellent heat resistance, and an optical fiber array including said curable material. One composition comprises a compound (A) having a reactive functional group and a polymerization initiator (B), wherein the compound (A) having the reactive functional group comprises a chain-like siloxane compound (SX) with a functional group equivalent of 800 g / mol or more.

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