Latex paint mainly contains benzene series, and the content of brand latex paint is much less Furthermore, because the wall is made of latex paint, the benzene inside is easy to volatilize, so the general wall and paint are dry and the benzene will not exceed the standard. Don't believe the saying that there is no benzene paint. Any paint should use benzene series as raw materials, just as there must be formaldehyde in glue. There is no real formaldehyde-free glue, only low formaldehyde glue. At present, the topcoat and primer of common brand latex paint are all water-based, and the environmental protection index of water-based latex paint is much better than that of ordinary latex paint. The so-called water-based latex paint is simply latex paint that can be diluted with water. The content of benzene harmful substances in water-based latex paint is greatly reduced, almost none.
The harmful substances in latex paint are mainly "volatile organic compounds" and "free formaldehyde". Among them, "volatile organic compounds" generally refers to VOC (volatile? Organic? Compound), VOC exceeding the standard will stimulate people's skin and eyes, damage the nerve and hematopoietic system, and seriously endanger human health.
The VOC content of latex paint is limited in China's "Limit of harmful substances in interior decoration materials", and the VOC standard is 200 g/L. In the current coating production process, film-forming additives and antifreeze are the main sources of VOC in coatings. Due to the limitation of raw materials and coating preparation level, in order to ensure and improve the coating performance of coatings, organic solvents (the main source of VOC) must be added to coatings. ? The addition of organic solvent increases the VOC content of the coating and reduces the environmental protection of the coating. Simply reducing the content of organic solvents will enhance the environmental protection performance, but the film performance, as one of the important properties of coatings, will be affected. Therefore, some latex paints are expensive because of their strong coverage. Many people mistakenly think that the more expensive the better, in fact, there may be more harmful substances. ?
Formaldehyde is a highly irritating gas and a volatile organic compound. Formaldehyde was detected by the International Agency for Research on Cancer (IARC? 1995) was identified as a suspected carcinogen. So we should also pay attention to the formaldehyde content. The influence of formaldehyde on human health is mainly manifested in stimulating eyes and respiratory tract, resulting in abnormal lung function, liver function and immune function. Therefore, when choosing latex paint, we should pay attention not only to its scrub resistance or coverage, but also to its VOC and formaldehyde content.
Is latex paint toxic?
Latex paint should be basically non-toxic, belonging to green products and water-based coatings. Their film performance is much better than that of solvent-based coatings, but here the organic solvent which accounts for half of solvent-based coatings is replaced by water. Therefore, the toxicity of organic solvents is basically solved by latex paint. Not all latex paints are 100% nontoxic and harmless. The possible harmful substances in latex paint are: 1. Formaldehyde; 2. Other organic solvents: including dichloromethane, chloroform, benzene, toluene, etc. 3. Heavy metals: including lead, cadmium, chromium and mercury.
The above is what we told you about the formaldehyde content of latex paint. I think everyone will have a good understanding of the formaldehyde content of latex paint after reading our sharing content. Latex paint is very common in our decoration industry, but it also has a great impact on our lives, such as home decoration, or building leakage and so on. However, everyone must be cautious when purchasing latex paint, and consider whether the formaldehyde content of latex paint is normal.