Composition for optical waveguide, preparation method for the composition, optical waveguide produced by using the composition, and optical waveguide manufacturing method

摘要

A composition for an optical waveguide is provided which contains no halogen atom and has no light absorption band in a visible to near-infrared spectral range. A method of preparing the composition is also provided. The composition includes: (A) a fine particulate zirconium oxide material including zirconium oxide fine particles, and a silicone oligomer and a silicone oligomer polymer bonded to outer peripheral surfaces of the zirconium oxide fine particles; and (B) a photoacid generator. For preparation of the composition, the fine particulate zirconium oxide material (A) is prepared by mixing a silicone oligomer in an aqueous dispersion of zirconium oxide fine particles, polymerizing the silicone oligomer in an acidic pH range to provide a silicone oligomer polymer, and bonding the silicone oligomer and the silicone oligomer polymer to outer peripheral surfaces of the zirconium oxide fine particles. Then, the photoacid generator (B) is blended with the fine particulate zirconium oxide material (A).