Nature and quantity of silicate filler influence on silicate paint properties with lowered content of volatile compounds

Abstract

This article is addressed to the problem of composite silicate paint development. Silicate paints have a large field of application, for example, it can be used as a protective coating or decorative coating with protective properties in industrial and civil construction for many aims: walls plastering, painting of stone, glass, ceramic, brick, concrete, wood, metal and other surfaces. The main difference of developed paint in comparison with the existing analogues is a low organic component content. The mass content of acrylic polymers was 5%, while actual silicate paints have a high content of organic modifiers (up to 25 %). The modifiers additive improves the technological properties, stability and viability of silicate paint. However, a high content of organic components reduces the environmental and fire protection properties of silicate paint coating. In comparison with analogues, proposed silicate paint composition is free from drawbacks listed above. In response to low content of volatile organic compounds, the paint has long spreadable life and improved technological and operational characteristics. Hiding power, viscosity, and degree of chalking were determined by standard methods. All characteristics meet the requirements of GOST. Many silica high dispersion fillers like a sand, marshalite, perlite, aerosil were tested in silicate paint composition. It was found that the coatings obtained with aerosil additive in a quantity of 0.25 % had the minimal water absorption value (0.15 %) and ultimate adhesion strength (1.7 MPa).