申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US11377573B2
公开(公告)日:2022-07-05
A curable composition that includes a urethane multifunctional (meth)acrylate, an inorganic filler having a primary particle dimension of at least 200 nm, a photoinitiator system that can be activated by electromagnetic radiation in the range of 340-550 nm, a reactive diluent, and a reinforcing silica having a primary particle dimension of 100 nm of less. The sum of the absolute value of the difference in the refractive index of the filler and the refractive index of the composition cured without filler plus the birefringence of the filler is 0.054 or less, i.e. 0.054≥|nfiller−nmatrix|+δfiller, where nfiller is the refractive index of the filler, nmatrix is the refractive index of the composition cured without filler, and δfiller is the birefringence of the filler.
一种可固化组合物,包括一种聚氨酯多功能(甲基)丙烯酸酯、一种主颗粒尺寸至少为 200 纳米的无机填料、一种可被 340-550 纳米范围内的电磁辐射激活的光引发剂系统、一种活性稀释剂和一种主颗粒尺寸小于 100 纳米的增强型二氧化硅。填料的折射率与不含填料的固化组合物的折射率之差的绝对值加上填料的双折射的总和为 0.054 或更小,即 0.054≥|nfiller-nmatrix|+δfiller,其中 nfiller 是填料的折射率,nmatrix 是不含填料的固化组合物的折射率,δfiller 是填料的双折射。