A photocurable composition, including (a) a photocurable monomer, e.g. a cationically curable monomer and/or a radically curable monomer; (b) reactive particles comprising a crosslinked elastomeric core, e.g. made of polysiloxane material, and a shell of reactive groups on an outer surface of the core, wherein the reactive groups comprise epoxy groups, ethylenically unsaturated groups, or hydroxy groups; and (c) an appropriate photoinitiator, e.g. a radical photoinitiator; and a cationic photoinitiator. A method of making a 3-D object from such a composition and a 3-D object made by the method are also provided. The cured composition generally has a smooth surface. The use of the reactive particles makes the composition more stable and the particles do not readily separate out.
一种光固化组合物,包括 (a) 光固化单体,例如阳离子固化单体和/或辐射固化单体;(b) 反应颗粒,包括交联弹性体芯,例如由聚
硅氧烷材料制成的交联弹性体芯,以及芯外表面的反应基团壳,其中反应基团包括环氧基团、
乙烯不饱和基团或羟基。由聚
硅氧烷材料制成的交联弹性体芯,以及在芯的外表面上的活性基团外壳,其中活性基团包括环氧基团、
乙烯不饱和基团或羟基基团;以及 (c) 适当的光
引发剂,例如自由基光
引发剂;以及阳离子光
引发剂。此外,还提供了一种用这种组合物制作三维物体的方法以及用该方法制作的三维物体。固化后的组合物一般具有光滑的表面。活性颗粒的使用使组合物更加稳定,颗粒不易分离。