Patent ID: 7199173
Filing Date: 2007-04-03
Classification: C01F,C01P

Abstract:
1. An agglomerate comprising fine primary particles of a synthesized calcium carbonate, the agglomerate satisfying the following expressions (a) to (e): wherein dp α: the value calculated by dividing the difference between the particle diameter d d d Sw: the BET specific surface area of the agglomerate [m St: the tensile strength [MPa] required to break the agglomerate with the particle diameter 4 μm, measured by a MCT-W500-J micro compression testing machine manufactured by Shimadzu Corporation under conditions of 9.8 mN in load and 0.892405 mN/sec in load speed, and Sta: the tensile strength [MPa] required to break 30% of the particle diameter of the agglomerate with the particle diameter 4 μm, measured by a MCT-W500-J micro compression testing machine manufactured by Shimadzu Corporation under conditions of 9.8 mN in load and 0.892405 mN/sec in load speed.