| abstract |
(57) [Summary] [Problem] The particle size is constant, there is no generation of fine particles, Provided is an amorphous silica particle having a novel structure, which is excellent in matting and antiblocking effects, has a low tendency to abrasion, and is excellent in scratch resistance or scratch resistance. SOLUTION: It is composed of dense amorphous silica and bulky amorphous silica, and has a pore volume of not more than 2.6 mL / g and a pore radius of not more than 3,600 Å by a mercury intrusion method, and an oil absorption of not less than 260 mL / 100 g. Amorphous silica particles characterized by the following. |