The 3-6 months after the coating is used is also the most likely period to endanger human health. According to experts, the harmful substances contained in paints and putty mainly include volatile organic compounds VOC, benzene, formaldehyde, heavy metals (lead, mercury, etc. ) and so on. Among them, benzene and benzene series are the main pollutants. It is understood that benzene has been identified as a carcinogen by the World Health Organization, which can cause cancer and blood diseases. Experts reminded that in addition to the pollution during construction, the harm after occupancy should not be underestimated.
Detailed description of paint
Brief introduction of coatings
Paint, what we usually call paint is just one of them. Refers to a liquid or solid substance that can form a film on the surface of an object for protection, decoration or other special functions (insulation, rust prevention, mildew prevention, heat resistance, etc.) under certain conditions. ).
Because most of the early paints used vegetable oil as the main raw material, it was also called paint. Now synthetic resin has largely or completely replaced vegetable oil, so it is called paint. Coatings are not liquid, and powder coatings are a major category of coatings.
The coating belongs to organic chemical polymer material, and the film-forming belongs to polymer compound type. According to the classification of modern chemical products, coatings belong to fine chemical products. Modern coatings are gradually becoming a multifunctional engineering material and an important industry in the chemical industry.
coating composition
Film-forming substance
It is the main component of coating film, including oil, oil-processed products, cellulose derivatives, natural resin and synthetic resin. Film-forming substances also include some non-volatile active diluents, which are the main substances that make the coating firmly adhere to the surface of the coated object to form a continuous film, and are the basis of the coating, which determines the basic characteristics of the coating.
assistant
Such as defoamer, leveling agent, etc. And some special functional additives, such as substrate wetting agent, etc. Generally, these additives can't form films, but they play a very important role in the process and durability of forming coatings on substrates.
pigment
There are generally two kinds, one is color pigment, common titanium dioxide, chrome yellow and so on. The other kind is physique pigment, which is often called filler, such as calcium carbonate and talcum powder.
solvent
Include hydrocarbon solvents (mineral oil, kerosene, gasoline, benzene, toluene, xylene, etc.). ), alcohols, ethers, ketones and esters. The main function of solvent and water is to disperse the film-forming base material and form viscous liquid. This is helpful for construction and improvement of some properties of the coating.
Precautions for use
In order to prevent paint from splashing on skin or eyes, work clothes, gloves and goggles must be worn during construction. If paint spills on your skin, rinse it with soap and water, preferably without solvent. If paint spills into eyes, immediately rinse with clear water for at least 10 minutes. Then go to the doctor for examination immediately.
If the operator feels dizzy, headache, nausea, vomiting, etc. He should immediately go to a place with fresh air and continue painting until the ventilation in the workplace is improved. If you faint from inhaling too much gas or paint mist, you should immediately move it to a place with fresh air to make it recover gradually, but don't do forced exercise.