PROBLEM TO BE SOLVED: To provide a material for a denture base, which contains a sufficiently dissolved methacrylate polymer or methacrylate copolymer, is stable for a long period of time, and is excellent in durability.SOLUTION: Provided is a method for producing the material for the denture base, characterized by mixing a methacrylate with a same weight or less of a methacrylate polymer or methacrylate copolymer and allowing the mixture to stand until sufficiently dissolving the polymer or copolymer, further mixing the solution with 20 to 80 wt.% of a radically polymerizable urethane acrylate oligomer, urethane methacrylate oligomer, urethane acrylate oligomer or urethane methacrylate monomer, 0.1 to 2 wt.% of a polymerization initiator or photosensitizer, and 0.1 to 2 wt.% of a reducing agent and allowing the mixture to stand until a gel-like compound is separated from the solution, and then extracting the separated gel-like compound.COPYRIGHT: (C)2009,JPO&INPIT【課題】メタクリル酸エステル重合体またはメタクリル酸エステル共重合体が十分に溶解し、長期間安定し、耐久性の優れた義歯床用材料を提供する。【解決手段】メタクリル酸エステルに、メタクリル酸エステル重合体またはメタクリル酸エステル共重合体を等重量以下混合し、十分に溶解するまで静置し、さらに、ラジカル重合可能なウレタンアクリレートオリゴマー、ウレタンメタクリレートオリゴマー、ウレタンアクリレートモノマーもしくはウレタンメタクリレートモノマー20~80wt%と、重合開始剤または光増感剤0.1~2wt%と、還元剤0.1~2wt%とを混合し、溶液とゲル状化合物とが分離するまで静置し、分離されたゲル状化合物を抽出する。【選択図】図1
