A reactive acrylic resin micro-particle comprising a particulate body resin and a number of linear segments attached to said body resin and extending outwardly therefrom, said particulate body resin being composed of an internally gellated acrylic resin and having a mean grain diameter of 0.01 to 20 µ and said linear segments each being composed of a linear carbon chain of 1 to 100 carbon atoms, which may be interrupted by an oxygen, sulfur or nitrogen atom, which is connected at one end to said particulate body resin through a urethane, acyl urethane, urea or acyl urea bond and possessed of at the other end an ethylenically unsaturated bond. The invention also includes the preparation of said microparticles and a curable acrylic composition containing said microparticies, at least one polymerizable monomer or oligomer and a polymerization initiator.
一种活性
丙烯酸树脂微粒,由颗粒体
树脂和连接在颗粒体
树脂上并向外延伸的若干线性片段组成,所述颗粒体
树脂由内部胶凝的
丙烯酸树脂组成,其平均粒径为 0.01至20微米,所述线性段分别由1至100个碳原子的线性碳链组成,碳链可被氧、
硫或氮原子打断,其一端通过
氨基甲酸酯、酰基
氨基甲酸酯、
脲或酰基
脲键与所述颗粒体
树脂连接,另一端具有
乙烯不饱和键。本发明还包括制备所述微粒子和可固化
丙烯酸组合物,该组合物含有所述微粒子、至少一种可聚合单体或低聚物以及聚合
引发剂。