| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a methacrylic resin thick plate, by which the methacrylic resin plate having a good appearance and little containing a residual monomer, especially the thick methacrylic resin plate, can be produced in good productivity. SOLUTION: This method for producing the methacrylic resin thick plate having a thickness of≥15 mm is characterized by polymerizing in a mold a polymerizing composition comprising 100 pts.wt. of a monomer consisting mainly of methyl methacrylate, 0.0001 to 0.05 pts.wt. of a radical polymerization initiator having a 10 hour half time temperature of 30 to 60°C, 0.001 to 0.05 pts.wt. of a radical polymerization initiator having a 10 hour half time temperature of 60 to 80°C, and 0.001 to 0.05 pts.wt. of a radical polymerization initiator having a 10 hour half time temperature of 80 to 120°C. COPYRIGHT: (C)2005,JPO&NCIPI
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