MESOPOROUS SILICA AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain a new mesoporous silica having respectively specific surface area and volume of the mesopores and useful as a molded article, a catalyst or a catalyst carrier by converting a silica precursor in a water-containing reaction medium containing a polymer dispersion liquid. SOLUTION: The mesopore of this mesoporous silica has a specific surface area of >=500m<2> /g and a volume of >=1.0mL/g. The maximum size of the pare diameter distribution of the mesopore is preferably >=3nm. The obtained silica is preferably baked. The polymer dispersion liquid is preferably a cationic aqueous polymer dispersion liquid stabilized with a cationic emulsifier and/or a cationic comonomer (emulsifying agent orα,β-ethylenic unsaturated monomer having quaternary amine or ammonium structure). These emulsified polymers can be produced preferably by using a free-radical polymerization initiator having a cationic group.