HYDROPHILIC POROUS GRANULAR SUBSTRATE, METHOD OF MANUFACTURING THE SAME, HYDROPHILIC COATING AGENT HAVING THE HYDROPHILIC POROUS GRANULAR SUBSTRATE

摘要

PROBLEM TO BE SOLVED: To provide a hydrophilic substrate which preserves high hydrophilicity and has excellent transmissibility for visible light, a manufacturing method thereof, and a hydrophilic coating agent having the hydrophilic porous granular substrate.

SOLUTION: The manufacturing method of the hydrophilic porous granular substrate which includes (1) dispersing the porous granular carrier with a particle diameter of 0.01-30 μm and a specific surface area of 50-900 m2/g in an aqueous high-concentration phosphoric acid solution containing phosphoric acid in a weight ratio 1-5 times higher than the porous granular carrier, (2) heat-treating it at 150-200°C after dispersion and (3) neutralizing it with ammonium after heat treatment, and relates to the hydrophilic porous granular substrate and hydrophilic coating agent having the hydrophilic porous granular substrate.

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