| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a hollow particle comprised of a silica shell and having high dispersibility, which can downsize the manufacturing apparatus, the peripheral apparatus and the like, and can reduce the load to the environment without discharging the used organic solvents. SOLUTION: The manufacturing method is characterized by mixing a colloidal calcium carbonate, a silicon alkoxide and a basic catalyst in an aqueous medium, to thereby deposit the silica generated by hydrolysis reaction of the silicon alkoxide onto the surface of the colloidal calcium carbonate, and thereafter dissolving the calcium carbonate with an acid treatment. The obtained hollow particle is comprised of a dense silica shell which has a diameter of a primary particle of 30-300 nm as measured by the transmission electron microscope method, and a particle size of 30-800 nm by the dynamic light scattering method, and which can not detect pores of 2-20 nm in a pore distribution measured by the mercury porosimetry. COPYRIGHT: (C)2006,JPO&NCIPI
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