METHOD FOR COATING SURFACE OF INORGANIC PARTICLES Russian patent published in 2018 - IPC C09C1/36 C09C3/06 C09C3/04 

Abstract RU 2675565 C1

FIELD: chemistry.

SUBSTANCE: invention can be used in the manufacture of pigments. In order to coat the surface of inorganic particles in an aqueous suspension containing at least one coating substance, circulation is used in a closed cycle of said suspension, in the circuit of which a vessel is provided, which is equipped with a mixer with a high rotation speed. Peripheral speed is at least 15 m/s or the specific mixing power per unit volume is at least 30 W/m3. Said circulation circuit further includes a flow-traversed mixer, operating according to the rotor/stator principle, into which a water-soluble initial compound of at least one coating substance is metered. Inorganic particles are particles of titanium dioxide that are coated with silica and / or alumina.

EFFECT: invention prevents agglomeration of the particles to be coated in the suspension, provides a coating with a smoother surface and higher density and degree of gloss.

14 cl, 4 dwg, 3 tbl, 3 ex

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RU 2 675 565 C1

Authors

Vilkenkhener, Uve

Fram, Khajko

Fridrikh, Jorg

Khommes, Korina

Dates

2018-12-19Published

2014-12-11Filed