IMPROVED ENERGY-EFFICIENT SOLVENT-FREE COATING COMPOSITIONS Russian patent published in 2017 - IPC C09D125/04 C09D133/06 C08K3/22 C09D7/12 

FIELD: chemistry.

SUBSTANCE: water coating composition has the volume pigment content (VCP) from 70 to 78%, and contains, with respect to the total volume of solids in the dry coating: a) damping pigment particles comprising: i) from 4 to 10% of titanium dioxide, b) non-damping filler particles comprising: i) calcium and magnesium carbonate, and/or ii) calcium carbonate and/or iii) nepheline syenite, and/or iv) kaolin. The total content of i)+ii)+iii)+iv) is from 40 to 75%, and the content iv) is from 0 to 45% and contains c) particles of styrene-acrylic polymer binder, the glass transition temperature (Tg) of which, calculated by the equation of Fox, is equal from -30 to 5°C, and the acid number is from 15 to 65 mg KOH per 1 g of the polymer. The polymeric particles consist of acrylic monomers and optionally additionally comprise styrene derivatives; comprises d) a dispersing agent which is insoluble in water at pH 3; wherein the composition does not contain a volatile organic solvent and hollow polymer damping pigment particles. The method of covering the part, and the part or structure, the surface of which is covered by the claimed composition, are claimed.

EFFECT: water coating compositions provide improved abrasion resistance in the wet state.

19 cl, 1 tbl, 1 dwg