M. N Chemical meets the challenges of keeping colored facades cool. In order to create cool facades and low inside temperature in very hot climate, M. N Chemical is introducing PIGMACOOL-M solar reflective colorants. This cool colorant systems is an intelligent combination of high performance colorants that have excellent solar heat reflectance properties.
PIGMACOOL-M solar reflective colorants are specially developed for water based facade paints and plasters. They minimize heat build-up in architectural and decorative paint applications for facades, roofs, window frames and Exterior Insulation Finishing Systems (EIFS).
The aim of solar reflective coating is to maximize the solar reflectivity of the coated surface. Reflectivity is achieved by the physical back scattering of solar radiation by pigment particles. This is well known for the visible range. However solar radiations not only comprise visible light, but also ultraviolet and near infrared (NIR), contributing over 50% ofthe solar energyThe amount of total solar energy absorbed by a top coat determines the heat build-up of a coated surface and resultsin a surface temperature depending on the duration of exposure. To achieve cool facade surfaces the pigments in thecoating need to reflect as much energy as possible. This reflection ability can be expressed as the Total Solar Reflection (TSR) value (100% = total reflection 0%= total absorption). Therefore, pigments with high TSR values show a high reflectioncombined with low heat buildup and vice versa.Pigment with the highest reflection ability are based on TiO2 white, while pigments with the lowest reflection are based on carbon black (PBk7). Figure 2 and 3 illustrate the reflection curves of different pigmented topcoats and the corresponding hat build-up profiles.
This is well known for the visible range. However solar radiations not only comprise visible light, but also ultraviolet and near infrared (NIR), contributing over 50% ofthe solar energyThe amount of total solar energy absorbed by a top coat determines the heat build-up of a coated surface and resultsin a surface temperature depending on the duration of exposure. To achieve cool facade surfaces the pigments in thecoating need to reflect as much energy as possible. This reflection ability can be expressed as the Total
