| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention can be used to obtain silicon dioxide dispersions. A dispersion of porous anionic particles of silicon dioxide with a modified surface contains a liquid and silicon dioxide particles. The maximum fractional filled volume (Fmax) of the said particles in the said liquid is at least 0.55 and can be calculated using formula , where F is the fractional filled volume of solid substances in the liquid, Fmax is asymptotic limit of the fractional filled volume while approaching infinity, b is intrinsic viscosity, 0 is viscosity of the liquid/solvent, is viscosity of the dispersion. The dispersion is obtained by forming a suspension from silicon oxide particles and liquid with its subsequent grinding. The said suspension contains a chemical agent which increases the volume fraction of the particles in the dispersion. The invention also relates to a coating composition and a coating on a substrate which contains the said dispersion. ^ EFFECT: invention enables to obtain stable silicon dioxide dispersions with high content of solid substances. ^ 31 cl, 2 tbl, 5 ex |
