Contaminated components of furniture paint and judgment skills

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Harmful substances in paints and coatings

1, VOC (volatile organic compounds)

VOC is the abbreviation of volatile organic compounds. Volatile organic compounds are organic substances that do not form a paint film in the paint and eventually volatilize into the atmosphere. Volatile organic compounds react with oxygen in the air to form ozone, which is harmful to the atmosphere and human health.

2, TDI (toluene diisocyanate)

TDI is mainly found in paints in the decoration and is derived from the synthesis of PU paint curing agents. Excessive TDI beyond the standard can cause harm to the human body, mainly sensitization and stimulation, eye pain, tearing, conjunctival congestion, cough, chest tightness, shortness of breath, asthma, red papules, maculopapular rash, contact allergies and other symptoms.

3, formaldehyde

Formaldehyde is a colorless, highly irritating gas. It is characterized by its high volatility and high toxicity. 35% - 40% of the aqueous formaldehyde solution is called formalin. Formaldehyde is highly toxic.

4. Benzene, toluene and xylene

Benzene is a highly toxic substance. Toluene and xylene are low-toxic substances. Inhalation of a certain amount of benzene, toluene and xylene can cause poisoning and even damage the hematopoietic system and nervous system.

5, soluble heavy metals

Heavy metals refer to metals having a density greater than 4.5 g/cc, such as lead, cadmium, chromium, mercury, and the like. Some of the resin, pigment or drier in the paint will have the presence of soluble heavy metals. If the paint contains heavy metals for a long time, it may cause mild neurasthenia syndrome and dyspepsia. In heavier cases, anemia and lead paralysis may occur.

Environmentally friendly paint and paint judgment skills

Note if it contains toxic solvents. Ethers such as benzene, methanol, and ethylene glycol are all toxic solvents. Toxic solvents can cause direct harm to production and construction personnel. If they come into contact with or are inhaled, they may cause diseases and cause serious death. Therefore, be sure to pay attention to the coating. Whether these solvents are contained in the ingredient list.

Pay attention to solvent usage restrictions. Dilution solvents used in paints and coatings include gasoline, turpentine, xylene, water-based acrylic acid, water, etc. Currently, environmentally friendly coatings basically use water as a solvent. Generally, after the paint is dried, the solvent can be completely volatilized, but some of the solvent volatilizes slowly, and prolonged exposure to toxic solvents may cause damage to human health. Therefore, when purchasing, be sure to see if there are solvents that are strictly restricted.

Look at the VOC content. The lower the content, the more environmentally friendly it is. VOC, a volatile organic compound, is an abbreviation of English Volatile Organic Compound, which refers to an organic compound that can volatilize itself in paints and coatings under normal temperature and pressure. Foreign restrictions on the amount of solvent used in paints and coatings are becoming more and more strict. Some commonly used solvents such as toluene, xylene, methyl ethyl ketone, acetate, etc. are all limited, and ethanol is no exception.

At present, some painters adopt non-additive technology, zero VOC technology, etc. The paints are basically free of formaldehyde, benzene and other organic volatiles in the production to ensure that the products are truly environmentally friendly products.

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