Patent ID: 7935329
Filing Date: 2011-05-03
Classification: B82Y,C01G,C01P,C03C,C09C,Y10S

Abstract:
1. A method of preparing a titania sol, comprising the steps of: a) elevating the temperature of a reactant solution in a reactor to a reaction temperature, the reactant solution comprising a precursor of titania in a solvent; b) preparing a titania sol by adding an acid catalyst to the reactant solution in an amount of from 13 to 25 parts by weight based on 100 parts by weight of the precursor of titania at the reaction temperature and conducting a sol-gel reaction while simultaneously removing the solvent from the reactor, whereby the conducting step occurs at a temperature of from 70 to 95° C. and under decompression; and c) drying the prepared titania sol and re-dispersing the dried titania in a solvent for dispersion, wherein the titania sol comprises secondary titania particles having an average diameter of 200 nm or less, and has a solid content of from 8 to 50 wt %, whereby a standard deviation of the diameter of the secondary titania particles does not exceed 0.3.