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1. (WO2018179818) METHOD FOR PRODUCING SILICA SOL

Pub. No.:    WO/2018/179818    International Application No.:    PCT/JP2018/003393
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Feb 02 00:59:59 CET 2018
IPC: C01B 33/141
C08G 77/02
Applicants: FUJIMI INCORPORATED
株式会社フジミインコーポレーテッド
Inventors: ASHITAKA, Keiji
芦▲高▼ 圭史
Title: METHOD FOR PRODUCING SILICA SOL
Abstract:
[Problem] To provide a method for producing a silica sol, wherein highly aggregated silica particles can be obtained without generating a gel-like substance. [Solution] The present invention provides a method for producing a silica sol, the method comprising a step for adding a liquid (B) to a liquid (A) to prepare a reaction solution, the liquid (A) containing an alkali catalyst, water, a first organic solvent, and silica particles for aggregation, the liquid (B) containing a second organic solvent and at least one among tetramethoxysilane and a condensate thereof, wherein the rate at which the liquid (B) is added when mixing is 8.5×10-4-5.6×10-3 mol/min, in terms of silicon atoms, per 1 mol of water contained in the liquid (A).