Building energy efficiency has become one of the important goals of saving energy. Data show that China's building energy consumption during use accounts for 27.6% of total energy consumption, and the more developed economy, higher living standards, this ratio will be greater.The rapid development of urbanization will lead to the rapid growth of urban population, combined with industrial development, car ownership soared, more and more buildings will make the city a "heat island effect" becomes more and more evident, which will building on the insulation, thermal insulation requirements more urgent.Buildings and facilities effectively reduce the surface temperature, for the protection of the environment, save energy and improve the living environment and so has very important significance. Thus, with the increasing amount of architectural coatings, energy-saving buildings affect the socio-economic development has become a major issue globally.
Insulation technology past the building material is mainly used to achieve low thermal conductivity, the commonly used polystyrene board material thickness of 30 ~ 50mm, its insulation system structure is complex, large construction difficult. In contrast, the insulation coating is by building facades and top coated with a barrier layer, reflection, radiation and other effects of the coating to achieve the purpose of energy efficiency and insulation thin functional coatings. Now, the insulation coating has become the new material development and production of the new hot spot.Currently made great progress in one aspect is the use of highly reflective hollow glass microspheres preparation of new insulation coatings. Research shows that the order fillers affect reflectivity coatings for: hollow beads> titania> sepiolite> silicate, and latex paint reflectivity varieties for little effect; and when the amount of hollow glass microspheres increases when coating reflectivity also increased, in hollow glass microspheres content of 35%, the thermal insulation coating reflectivity is maximized.Simultaneous use of hollow glass beads and high refractive index white pigment can effectively improve the insulating effect of the coating. Composite pigments and functional filler composite infrared radiation on the basis of the traditional water-based coating formulations on adding high reflectivity of hollow glass microspheres and ultrafine titanium dioxide can be prepared with high reflectivity and high-radiation-based, supplemented by traditional insulation the new water-based insulation coating.Recent studies have shown that blending different ways and different proportions of functional materials for thermal insulation effect paint has a great influence. Powder to absorb infrared heat building has a certain launch function, can speed up the rate of indoor cooling, is an active cooling type of new insulation coatings. In addition, using acrylic emulsion binders, fillers having a high refractive index, thermal insulation coating rutile titanium dioxide and hollow glass microspheres prepared, its reflective insulation effect with increasing filler content and enhanced thermal insulation, when separated thermal filler content of 13%, reflective insulation effect is maximized.It was also reported as a barrier with Xonotlite filler to rutile titanium dioxide and hollow glass microspheres as a functional filler can be prepared an excellent building exterior insulation coatings. The results showed that: single-doped Xonotlite, rutile and hollow glass microspheres can improve the thermal properties of the coating; incorporation of these types of composite materials can be further improved thermal performance when several functions above fillers incorporated in an amount of 9%, 30%, 15%, the reflectance of the coating of up to 93.69%. Coatings for 250 ~ 2500nm wavelength within the range of the strongest sunlight reflectivity, insulation temperature up to 13 ℃.
This article from the China steel news