9.2 Thermochromic Additives Applied to Waterbased Acrylic Coating
(Room 243-245)
10 Apr 18
2:30 PM
-
3:00 PM
Tracks:
Session 9: Architectural Coatings II
IR-reflective pigments are design to reduce heat building in coatings by reflecting near infrared (NIR) spectrum. Highly effective at high temperature, NIR reflection can be counterproductive in cold climate, when coating temperature decreases below 30°C. Thermochromic additives are scientific and technical advancement developed to respond to this as a smart material. Acting as a reflective pigment above 30°C, or another tunable temperature, the thermochromic additive admit a state change below 30°C and adjust its properties to transmit NIR spectrum.
Different thermochromic additives have been prepared; all based on Vanadium dioxide (VO2) chemistry. For the first time, a complete study is currently conducted through water-based acrylic coating example. Several properties, such as optical transmission, total solar reflectance (TSR), color measurement and resistance to weathering are currently or planned to be investigated.