Improved Product Properties of Pigmented Acrylic and Alkyd Paints

4 Improved Product Properties of Pigmented Acrylic and Alkyd Paints 

Two important product properties of pigmented acrylic and alkyd paints that will be described in detail here are dirt pickup resistance and hiding power. Both of these two product properties can be improved by adding glycerolpropylsilyl-modified silica dispersions to the binder formulation. 

The different paint formulations (see Table 9.8) were apphed on fibrocement substrates in two layers by using a brush. The drying time of the two layers was 24 h at room 

After drying the soiled surfaces for 24 h, the surfaces were cleaned in two different ways. The first cleaning method of the soiled surfaces was to gently use a soft towel under running water to simulate rain. In the second cleaning method, a soap and water solution was used instead to simulate manual cleaning. 

The dirt pick-up resistances have been evaluated from the paint surface color modifications (CIE L a b measurements before and after the contamination followed by washing) of the coated panels and are expressed in terms of deltaE (AE) calculated from experimentally measured values of L (lightness), a (red-green color), andb (blue-yeUow) based. 

---