Most of the solvent-based wood coatings used for interior decoration use organic substances as solvents. The xylene solvent is a commonly used solvent in the coating industry because of its strong dissolving power and moderate volatilization speed.
The type, composition and nature of wood coatings. During the construction and use, it can cause the indoor air quality to decline, as well as the main volatile organic compounds, benzene, toluene, xylene, etc., which may affect human health.
1. Volatile organic compounds
Volatile organic compounds (VOCs) can pollute the environment and increase the load on indoor organic pollutants. Seriously cause headaches, sore throat and other symptoms, endangering human health.
2, benzene, toluene, xylene
At present, paint manufacturers rarely use benzene as a solvent. In wood coatings, benzene is mainly introduced as impurities into toluene and xylene. The level of benzene is related to the production process of toluene and xylene.
Considering the type, composition and properties of wood coatings, the main harmful substances are volatile organic compounds, benzene, toluene and xylene, free toluene diisocyanate and soluble heavy metals such as lead, cadmium, chromium and mercury. During the construction and use, it often causes the indoor air quality to drop, which has a certain impact on human health. Volatile organic compounds (VOCs) not only pollute the environmental quality, but also increase the load of indoor organic pollutants. In severe cases, it can cause headaches, sore throats and harm to human health. Benzene has been confirmed by the International Cancer Research Center. It is a highly toxic carcinogen, mainly affecting the human hematopoietic system, nervous system, and skin. The free toluene diisocyanate (TDI) is a highly toxic inhalation poison, which has accumulation and latency in human body. It is also a mucosal irritant that has a strong stimulating effect on the eyes and respiratory system, causing allergic asthma, causing asphyxia, etc.; soluble metals such as lead, cadmium, chromium and mercury are soluble in the human body. Obvious hazard, excessive lead can damage nerves, hematopoiesis and reproductive system, especially affecting children's growth and mental development. Long-term inhalation of cadmium dust can damage kidney or lung function. Long-term exposure to chromium compounds can cause contact dermatitis or eczema, mercury. Chronic poisoning mainly affects the central nervous system.
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