dispersion of TiO2 was uniformity, and application was improved, in particular hiding power and tinctorial power by adding PPA and nanocalcium carbonate in masterbatch.

• 浓白色母粒中加入PPA和纳米碳酸钙，使钛白粉粒子的分散均匀，提高了母粒的着色力、遮盖力等应用性能。