Patent ID: 8535852

Claim:
A volume hologram recording material, comprising: from 10 to 70 parts by weight of a photoradical polymerizable compound, from 3 to 20 parts by weight of a photopolymerization initiator, and from 25 to 80 parts by weight of a dispersion medium, wherein the photoradical polymerizable compound is a compound comprising an aromatic ring and a (meth)acryloyl group in each molecule, and the dispersion medium is a medium capable of dispersing the photoradical polymerizable compound and the photopolymerization initiator and is of formula (I): wherein R 11 is a divalent hydrocarbon group having from 2 to 4 carbon atoms, R 12 and R 13 are each independently a hydrocarbon group having from 1 to 10 carbon atoms, k, l, m, and n are each independently a number of 0 or more and 5 or less, and if both ethylene oxide units and propylene oxide units are present in the compound of formula (I), then the ethylene oxide units and the propylene oxide units are in a random or block configuration.