Patent ID: 9266086
Filing Date: 2016-02-23
CPC Classification: B01J

Claim Text:
1. Coated particles comprising: particles each having a surface, and at least the vicinity of the surface being constituted of a calcium phosphate-based compound having phosphate groups and calcium; wherein at least a part of the surface of each of the particles is coated with a polyamine-based compound having amino groups and a network structure represented by the following chemical formula where “n” is an integer of 1 or more, and an average particle size of the particles is 1 μm or more, and wherein at least a part of the amino groups is bonded to the phosphate groups, and at least the calcium, the phosphate groups and the amino groups are exposed to the surface of each of the particles and an amount of the calcium exposed to the surface is lower than an amount of the phosphate groups exposed to the surface, so that the coated particles have adsorption capability with respect to both a substance having negative electrical charge in the calcium and the amino groups and a substance having positive electrical charge in the phosphate groups.