An organic compound (A) containing cupric ion and a compound (B) having at least one P-O-H bond in a molecule are contained into the methacrylic resin selected from poly(methyl methacrylate) or methacrylic polymers containing at least 50% by weight of a methyl methacrylate unit.
                            将含有
铜离子的有机化合物 (A) 和分子中至少有一个 P-O-H 键的化合物 (B) 加入
甲基丙烯酸树脂中,该
树脂选自
聚甲基丙烯酸甲酯或
甲基丙烯酸聚合物,其中
甲基丙烯酸甲酯单元的重量至少占 50%。