Paint knowledge: what are the harmful substances in paint

Core tip: these harmful substances generally include: the harmful substances in paint mainly include: formaldehyde, VOC (toxic volatile gas), heavy metals (mercury, chromium, lead, etc.), toluene compounds, etc Generally speaking, the content of these substances in the brand paint is relatively low, and the environmental protection performance is relatively good Paint often comes into contact with some toxic substances, which will cause certain toxic effects on the environment and human health The common toxic compounds in paint and coating are summarized as follows: 1 Toluene, xylene toluene and xylene are medium toxic solvents in solvent classification, which have anesthetic and irritant effects on human body, High concentration on nervous system Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: these harmful substances are generally: paint harmful substances mainly include: formaldehyde, VOC (toxic volatile gases), heavy metals (mercury, chromium, lead, etc.), toluene compounds, etc Generally speaking, the content of these substances in the brand paint is relatively low, and the environmental protection performance is relatively good Paint often comes into contact with some toxic substances, which will cause certain toxic effects on the environment and human health The common toxic compounds in paint and coating are summarized as follows: 1 Toluene, xylene toluene and xylene are medium toxic solvents in solvent classification, which have anesthetic and stimulating effects on human body, and toxic effects on nervous system at high concentration, but the residual toxicity in human body is low, which can be generally eliminated by metabolism The maximum allowable concentration in the air is 100mg / m3 People who have long-term exposure to toluene and xylene should not drink white spirit, let alone excessive high level white spirit, because alcohol will prolong its retention time in the body, which is extremely harmful to health The workplace should maintain air circulation to reduce its concentration in the air According to the latest research data, toluene and xylene will produce certain photochemical reaction after entering the atmosphere, which will damage the ozone layer 2 Benzene, a highly toxic solvent, is an aromatic and volatile organic substance, which has anesthetic and stimulating effects on human nervous system A small amount of inhalation can also cause long-term damage to the human body Benzene can accumulate in the nervous system and bone marrow, damage the nervous system and hematopoietic tissue, reduce the number of white blood cells and platelets in the blood, long-term contact can cause leukemia "Classic" paint contains no benzene 3 After metabolism, glycol ether solvents will form highly toxic compounds, which will cause permanent damage to human blood circulation system and nervous system Long term exposure to high concentration glycol ether solvents will cause cancer In addition, glycol ether solvents will cause permanent damage to the female reproductive system, resulting in female infertility 4 TDI (Chinese name is toluene diisocyanate) TDI has a low vapor pressure, which has a strong irritant effect on human cornea, causing eye redness and swelling TDI vapor will damage the liver and kidney function after inhaled by human body Long term exposure to high concentration of TDI vapor will cause cancer In polyurethane (PU) paint, the free TDI of curing agent is less than 0.5%, which is basically harmless to health The free TDI content of "classic" Aijia health paint is less than 0.02%, which is 10 times lower than the national compulsory standard, avoiding the damage of free TDI to human body 5 Heavy metal mainly exists in the paint, mainly comes from the pigment part of the paint Excessive heavy metals in human body will cause chronic poisoning Heavy metals affect the growth and development of children, especially the intellectual development of children Unfortunately, heavy metal free pigments are expensive "Classic 2000" fully uses non-toxic pigments, and the content of heavy metals is much lower than the relevant compulsory standards of the European community 6 Phthalate ester plasticizer phthalate ester plasticizer is the most widely used plasticizer in volatile paint In the past, it was considered that it has no toxicity to human body for quite some time However, according to the latest research in Europe and the United States, this kind of plasticizer has no obvious adverse effect on adult health, but it will have adverse effects on children's development, mainly resulting in precocious puberty Therefore, in recent European and American standards, it has been clearly stipulated that such plasticizers should not be used in children's toys 7 VOC VOC is volatile organic compounds According to incomplete statistics, about 3 million tons of volatile organic compounds are discharged into the atmosphere every year in China's paint industry, which directly pollutes the atmospheric environment, destroys the living environment of human beings, damages human health, and causes huge waste of resources It is not in line with the current economic model of sustainable development of regeneration 8 Formaldehyde is a kind of irritant gas, which will damage respiratory tract and internal organs It mainly exists in adhesives and water-based paint, and the inferior wall putty is also a major source 9 Radon What is radon? Radon is a colorless and tasteless radioactive gas, 7.5 times heavier than air It is the decay product of uranium, radium and other radioactive elements After radon decays, the short-lived progeny is called radon and its progeny Radon is distributed in soil, water and air In the soil or rock with high uranium content, radon concentration is higher Radon is radiated from uranium in underground, ground water and building minerals, enters the room and accumulates in the place with poor ventilation ◆ the harm of radon to human body? Radon is a gas, while radon daughters are solid In the room, most radon daughters are adsorbed on fine particles suspended in the air When the short-lived daughters of radon are inhaled, they are continuously deposited on the surface of the respiratory tract and accumulated in local areas, which may lead to lung cancer, leukemia and respiratory diseases Because in the lung, radon can release particles, but also can release particles and r-rays, thus causing harm to the lung The World Health Organization has listed radon as one of the 19 carcinogenic substances The above substances are the main pollution and damage to the environment and human body of the coating industry, which need to be controlled emphatically They are also the main driving force to promote the development of today's coating products to "high solid", "water-based", "economical" and "low pollution" Home of coatings focuses on coatings, paint coatings, coating technology, news and information of fire retardant coatings, coatings, coating technology, decoration knowledge and decoration renderings of fire retardant coatings,