| 摘要 |
An opacifying particle including a certain pigment particle at least partially encapsulated in a polymeric shell having a calculated thickness of from 35 nm to 200 nm, the polymeric shell including at least a first polymer phase and a second polymer phase, wherein the first polymer is substantially in contact with the surface of the pigment particle providing a calculated shell thickness of at least 25 nm and wherein the first polymer has a refractive index of at least 0.03 units less than that of the second polymer is provided. Further provided is a composition including certain pigment particles at least partially encapsulated in a shell of a first polymer having a calculated thickness of from 25 nm to 200 nm, and the encapsulated pigment particles in contact with a second polymer, wherein the first polymer has a refractive index of at least 0.03 units less than that of the second polymer. |
