WAVELENGTH CONVERSION MATERIAL

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PROBLEM TO BE SOLVED : To provide a wavelength conversion material which is composed of resin particles in which an organic rare earth complex is incorporated in an acrylic resin and prevents the deterioration of the organic rare earth complex.SOLUTION : There is provided a wavelength conversion material composed of resin particles comprising an acrylic resin including an organic rare earth complex, wherein the acrylic resin is a polymer obtained by reacting a composition for an acrylic resin comprising a (meth)acrylate monomer, a crosslinking agent and an azo-based polymerization initiator, the composition for an acrylic resin substantially contains no organic peroxide having a group represented by R-C(=O)O- (R represents an optionally substituted hydrocarbon group) as a polymerization initiator and contains an organic peroxide having a one-minute half-life temperature of 145°C or less as another polymerization initiator.COPYRIGHT : (C)2016, JPO&INPIT