DISPERSION OF HYDROPHOBISATED SILICON DIOXIDE PARTICLES AND GRANULES MADE THEREFROM Russian patent published in 2013 - IPC C09C1/30 C01B33/14 C09D7/12 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing a dispersion of silicon dioxide particles with a modified surface, having mean diameter of not more than 100 nm, via high-pressure grinding of a pre-dispersion containing a) 10-50 wt % silicon dioxide particles with a modified surface, b) at least one glycol monoether of general formula H₃C(CH₂)_m-O-(CH₂)_n-[O-(CH₂)_o]_p-OH (A), c) at least one carboxylic ester of general formula H_2x+1C_x-O-CH₂-(CHR)-[O-CHR]_y-O-C(=O)-C_zH_2z+1 (B), where the molar ratio A/B ranges from 10:90 to 40:60 and m, n, o, p, x, y and z do not depend on each other. Also disclosed is a dispersion obtained using the disclosed method, a method of producing granules of silicon dioxide particles with a modified surface by separating the liquid phase of the dispersion, granules obtained using the disclosed method and use of the dispersion and granules in coating materials.

EFFECT: disclosed dispersion and particles can be used in transparent coating compositions.

10 cl, 2 tbl, 6 ex