Composition for hologram recording medium and hologram recording medium using the same

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PROBLEM TO BE SOLVED : To provide a composition for a hologram recording medium which is excellent in recording characteristics, has little change in recording characteristics due to storage, and is excellent in storage stability, and to provide a hologram recording medium using the same.SOLUTION : A composition for a hologram recording medium is obtained by using : compound having an isocyanate group; compound having an isocyanate-reactive functional group; a polymerizable monomer; a photopolymerization initiator; and a rare earth-based catalyst.