METHOD OF PREPARING POLYMERIC FINISHING COATING COMPOSITION FOR POROUS SURFACES Russian patent published in 2006 - IPC C09D109/08 C09D5/02 

FIELD: polymer materials and protective coatings.

SUBSTANCE: invention relates to primer materials, including water-dispersed paints, and is used to form protective-decorative coating of porous surfaces, e.g. various-destination indoor and outdoor brick, concrete, plaster, and similar surfaces. Method comprises preparation of components A and B. The former is water-based suspension of zinc oxide or titanium oxide, talc, powdered cellulose and Sulfosid-61 at ratio 2:1.1:0.04:0.04:0.08, respectively, which is prepared in disperser for 15 min at 18-25°C. The latter component (B) is water-based emulsion containing plasticizer (dibutyl phthalate or Edos), sodium carboxymethylcellulose, liquid sodium glass, and Sulfosid-61 at ratio 6:1.4:1:0.6, which is prepared in planetary mill for 15 min and 18-25°C. Components A and B are then mixed, whereupon latex (SKS-65GP) is added for 20 min at 18-25°C to form composition containing, wt parts: latex 100, component A 85-95, component B 7-8, and water 102-115. Advantages of invention comprise simplification of water-dispersed paint production process, reduced process time due to independent and simultaneous preparation of the two composition components, which are mixed with latex without foaming and stratification.

EFFECT: increased homogeneity of composition and improved spreading capacity, water and frost resistance of coating.

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