A polymerizable composition contains unsaturated urethane shown by Formula (1) given below, vinyl monomer which are copolymerizable with this unsaturated urethane, and an inorganic powder filler at weight ratio of (unsaturated urethane)/(vinyl monomer ) = 10/90-90/10, the inorganic powder filler being 30-300 weight parts with respect to 100 weight parts of the sum of the unsaturated urethane and vinyl monomer :
where R¹ is hydrogen atom or methyl group; X is a residual group obtained by removing isocyanate groups from diisocyanate; Y is a residual group obtained by removing hydroxyl groups from non-radical polymerizable di-ol or tri-ol having alkyl group or alkenyl group with 5-22 carbon atoms; Z is an organic group in the form of (R²O)m or R³O, R² being an alkylene group with 2-4 carbon atoms, R³ being an alkylene group with 2-12 carbon atoms, and m being an integer 2-10; and n is 2 or 3.
一种可聚合组合物含有下式(1)所示的不饱和聚
氨酯、可与该不饱和聚
氨酯共聚的
乙烯基单体和无机粉末填料,重量比为(不饱和聚
氨酯)/(
乙烯基单体)=10/90-90/10,其中无机粉末填料占不饱和聚
氨酯和
乙烯基单体总重量 100 的 30-300 重量份:
其中 R¹ 是氢原子或甲基;X 是通过从二
异氰酸酯中去除
异氰酸酯基团而得到的残余基团;Y 是通过从具有 5-22 个碳原子的烷基或烯基的非辐射可聚合二元醇或三元醇中去除羟基而得到的残余基团;Z 是 (R²O)m 或 R³O 形式的有机基团,R² 是具有 2-4 个碳原子的亚烷基,R³ 是具有 2-12 个碳原子的亚烷基,m 是 2-10 的整数;n 是 2 或 3。