FIELD: paint production.
SUBSTANCE: invention relates to photocatalytic compositions, for example, to photocatalytic compositions based on cement, and to their use for the production of aqueous paints. The proposed photocatalytic composition contains: (a) at least one binding material, which is Portland cement, in the amount from 20 to 50% by weight; (b) at least one photocatalyst, where at least one photocatalyst is titanium dioxide particles having photocatalytic activity in the visible region of the spectrum in the amount from 0.5% to 5% by weight; (c) at least one cellulose having a Brookfield RVT viscosity at 20°C from 100 to 70,000 MPa·s in the amount from 0.8% to 2.2% by weight; (d) at least one diluent agent in the amount from 0.1% to 1.2% by weight; (e) at least one first calcareous filler in the form of particles, among which at least 95% by weight have a size of no more than 40 mcm, where the amount of the first calcareous filler is in the range from 15% to 35% by weight; (f) at least one second calcareous filler in the form of particles, among which at least 95% by weight have a size of no more than 20 mcm, where the amount of the second calcareous filler is in the range from 15% to 35% by weight, wherein the second calcareous filler has smaller particles compared to the first one; (g) at least one heat-insulating material containing hollow ceramic spheres with a diameter in the submillimeter range in the amount from 0.1% to 4% by weight, and (h) hollow microspheres of borosilicate glass in the amount from 0.1% to 4% by weight. The specified photocatalytic composition is used for coating building structures to reduce the number of contaminants. A method for producing the specified composition includes mixing components for a period of time sufficient to ensure good homogenization.
EFFECT: improvement of heat-insulating and reflective properties of the coloring product, as well as the area of the painted dried surface per kg of liquid paint.
26 cl, 2 tbl, 2 dwg
