Preparation of Infrared Reflective & Thermal Insulation Coating Based on Organic-inorganic Compound Film Forming Materials

Infrared reflection and thermal insulation (IRTI) coating was prepared based on film forming materials (FFM) of metakaolin geopolymer (IP) and styrene-acrylic emulsion (OP) by ordinary paint processing method. Its infrared reflection and thermal insulation properties were characterized and analyzed. Results show that as m(IP)/m(OP) is the range of 0.3~1.0, the hardness and fragility of FFM film are synchronously improved with the increasing of IP content; as m(IP)/m(OP)>1.0, the storage stability at room temperature for FFM decreases. For the resulting IRTI coating specimens based on the FFM with m(IP)/m(OP) of 0.5, their properties of infrared reflection and thermal insulation are varied with adding amount of TiO₂ (rutile type) and hollow glass beads (HGB). The maximum value of infrared reflective rate is 0.91 with TiO₂ mass fraction of 20%, and the maximum value of temperature difference (Δt) through the calcium-silicate plate is 11℃, which is coated with IRTI coating of m(HGB)/m(TiO₂)=0.6. For the plate only coated with IRTI coating of TiO₂, Δt reaches 3℃ as it is shined by iodine-tungsten lamp.