The invention provides dental polymerizable monomer compositions that can give cured products having high toughness and high rigidity, and provides dental compositions containing such dental polymerizable monomer compositions and cured products thereof having high mechanical properties.
[Solution]
The dental polymerizable monomer composition includes a urethane acrylate compound (A) and a polymerizable compound (B) having at least one polymerizable group selected from methacryloyl groups and acryloyl groups, the urethane acrylate compound (A) being obtained by reacting a specific hydroxyacrylate (a1) with a diisocyanate (a2) having two isocyanate groups bonded to a divalent C6-9 aromatic hydrocarbon group or a divalent C6-9 bridged cyclic hydrocarbon group via a methylene group optionally substituted with a hydrocarbon group in place of a hydrogen atom, the proportion of the number of acryloyl groups present in the urethane acrylate compound (A) being 10% to less than 90% relative to the total number of methacryloyl groups and acryloyl groups in the dental polymerizable monomer composition. The dental composition includes the dental polymerizable monomer composition.
本发明提供了能够使固化产品具有高韧性和高刚性的牙科可聚合单体组合物,并提供了含有这种牙科可聚合单体组合物的牙科组合物及其具有高机械性能的固化产品。
[解决方案]
牙科可聚合单体组合物包括聚
氨酯
丙烯酸酯化合物(A)和可聚合化合物(B),后者具有至少一个选自甲基
丙烯酰基团和
丙烯酰基团的可聚合基团、聚
氨酯
丙烯酸酯化合物(A)是通过特定的羟基
丙烯酸酯(a1)与二
异氰酸酯 (a2)反应得到的,二
异氰酸酯(a2)具有两个
异氰酸酯基团,这两个
异氰酸酯基 团通过一个亚甲基基团与一个二价 C6-9
芳烃基团或一个二价 C6-9 桥接
环烃基团键 合,该亚甲基基团可选择用一个烃基取代一个氢原子、相对于牙科可聚合单体组合物中甲基
丙烯酰基团和
丙烯酰基团的总数,聚
氨酯
丙烯酸酯化合物(A)中
丙烯酰基团的数量比例为 10%至小于 90%。牙科组合物包括牙科可聚合单体组合物。