Coatings are widely used in interior decoration. Its excellent anti-corrosion, protection and decorative properties make it widely used on interior walls, floors, furniture surfaces, and daily necessities. The composition of coatings has four parts, namely volatile components , film-forming substances, additives, and pigments. Volatile components are the main part of indoor air pollution caused by coatings, and some coatings may emit more than one species including benzene, toluene, xylene, etc. into the air. Although formic acid is not the raw material of most paints, there are still some paints that may add formaldehyde-containing additives, such as antifungal agents, to improve performance . These volatiles can have a serious .
According to the type of solvent used, coatings can be divided into traditional oil-based paints (and new water-based paints) . , which greatly reduces the content, which is relatively safer and more environmentally friendly, but it is still inevitable to add some coalescents to the formula to ensure the performance of the paint film. Therefore, in actual painting, water-based paint will also cause indoor air. pollute.
Today, building energy conservation is strongly advocated. In order to save air-conditioning energy consumption, the indoor and outdoor air exchange is limited a low level. It is used in places with special requirements such as hospitals, laboratories, etc. Most of the working and living places adopt a relatively energy-saving hybrid system (the air treated by the air conditioner is a mixture of fresh air and return air), which also means that indoor pollutants are not easy to spread, and may even accumulate indoors for a long time. Scholars at home and abroad have carried out a lot of research work on the pollution of indoor environment in coatings .
