Patent ID: 9221690
Filing Date: 2015-12-29
Classification: C01B,C04B,C08L

Abstract:
1. A method for producing a silica sol material by (a) controlled bringing together of an aqueous acid solution and a hydrolysable silicon compound, (b) subsequent evaporation to give a single-phase solution with a viscosity in a range from 0.5 to 30 Pa·s at a shear rate of 10 s (c) ripening of the single-phase solution obtained in (b) to give a silica sol material with a viscosity from 30 to 100 Pa·s at a shear rate of 10 s wherein a) is carried out under isothermal conditions, wherein the ripening in c) is carried out with stirring of the single-phase solution, and wherein a) to c) is carried out in the same reaction vessel.