COMPOSITES OF INORGANIC AND/OR ORGANIC MICROPARTICLES AND NANOPARTICLES OF CALCIUM CARBONATE Russian patent published in 2012 - IPC C09C1/00 C09C3/06 C09C3/10 C09D4/00 B01D39/04 

FIELD: chemistry.

SUBSTANCE: invention can be used in producing pigments and/or filler materials for paper, paint and plastic. The composite contains particles of an inorganic and/or organic pigment and/or filler having equivalent diameter of 0.2-100 mcm, coated at least partially with a composition containing calcium carbonate particles having equivalent diameter less than 200 nm, and binder based on copolymers containing monomers in form of one or more dicarboxylic acids and one or more monomers from a group comprising diamines, triamines, dialkanolamines or trialkanolamines. Particles of the inorganic pigment and/or filler are selected from talc, mica or mixtures thereof. Particles of the organic pigment and/or filler are selected from polyethylene, polypropylene, polyethylene terephthalate or polystyrene. To obtain the composite, particles of the pigment and/or filler are mixed with a calcium carbonate composition, mainly in form of an aqueous suspension, and binder is added and the mixture is homogenised. In another version, the binder can be added to particles of the pigment and/or filler or to the calcium carbonate composition. Calcium carbonate is ground using ball mills, jet mills, burr mills or combination thereof cyclones and sieves.

EFFECT: obtained composites have high opacity, whiteness and lustre, high capacity for printing and resistance to segregation.

57 cl, 11 dwg, 4 ex