Are volatile organic matter present in water-based coatings? It's clear after reading this

Definition of water-based coatings and volatile organic matter
In order to explore the hazards of volatile organic matter in water-based coatings, it is necessary to understand the meaning and characteristics of water-based coatings and volatile organic matter. The water-based coatings covered in this article refer to all coatings used as solvents or dispersing media. At present, it is considered to be a relatively new coating in the paint market
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. This coating is widely used because it has the advantages of strong surface adaptability, strong adhesion, good parallel spread, saving a lot of resources, reducing air pollution and so on. Therefore, water-based coatings are possible. This is an important future direction of the coatings market. It is necessary to study it.
world health organization defines volatile organic compounds (VOCs) with an ambient temperature range of 50-260 degrees Celsius. According to its chemical structure, it can be divided into alkanes, aromatics, esters, aldehydes and so on. At present, more than 300 species have been identified, quite amazing. Indoors, high concentrations of volatile organic compounds can cause many safety problems, most likely caused by acute poisoning, and can be severe until they are in a coma, convulsions, or even damage to the internal organs, brain and nervous system. Memory and other serious consequences. Severe cases can also lead to liver poisoning or even coma, which brings life-threatening hazards that cannot be ignored.
The dangers of volatile organic matter in water-based coatings
In recent years, with the continuous development of the decoration market, consumer demand for various types is becoming more and more intense, manufacturers in order to meet consumer demand and ignore various preventive measures, resulting in more and more problems in the furniture industry. A succession of problems, indoor environmental pollution is particularly serious. It can be seen that because indoor environmental pollution has endangered human health, but also more and more attention to the concept of public consumption. Today, consumers demand a high brightness of all colors during the decoration process. Water-based coatings are one of the most important elements to meet the needs of consumers. There are a variety of volatile organic matter in water-based coatings. These organic compounds consist of hydrocarbons, halogenated hydrocarbons, nitrogen hydrocarbons and oxygen. Hydrocarbons, etc., itself contains a variety of compounds, these compounds in addition to heavy metals, but also contain formaldehyde, glycol esters, ammonia and other volatile organic compounds. Once people live in a room, there are too many of these substances, and the consequences can be unimaginable. So what should we do in the face of such demands and dangers? The author believes that although this kind of harm can not be said to be completely eliminated, but can be prevented and controlled, as far as possible to minimize the risk can learn from the following methods.
years, water-based coatings have been widely used in surface coatings in China under the requirement of environmental protection and emission reduction. As the name implies, water-based coatings are water-soluble coatings, while oil-based coatings, i.e. solvent-based coatings, are insoluble in water when passing through hydrocodes and water curtain cabinets and are suspended or diffused in water. Oily coating dissolves in water to produce wastewater, while oily coating suspends or diffuses in water to produce wastewater, but the treatment process and treatment principle of two kinds of wastewater is different, oily coating wastewater treatment is filtration filter, is a mature physical p.e process, is a better treatment process, and water-based paint wastewater dissolved in water film reverse osmosis (MRO) is a complex and expensive physical process to treat wastewater. If chemical methods are used, the costs will be higher and the trouble will be greater. In other words, water-based coatings are used in the coating process and dry spraying technology is used in the coating room. Dry filters are used to intercept solid substances such as pigments, titanium dioxide, liquid substances such as water-based resins and other official energy groups at the discharge port. The total non-methane hydrocarbon content of exhaust port exhaust gas must be less than 20%. Mg/M, because 80% of water-based paint thinners are water, and 95% of good water-based coatings are water. 20%-5% solvent is alcohol and a small amount of ether and very few additives, additives are to change the surface strength of water-based resins, improve water-based coating adhesion. Therefore, it is recommended to build a dry coating production line on the late coating production line of water-based coating. Do not use zeolite channels in primers, midway and color paints to reduce losses when replacing water-based coatings. Zeolite flow channels can be considered for smooth varnish lines because surface smooth varnishes do not enable water-like varnishes in a short period of time.
In order to reduce construction costs and equipment volume, dry spray is the future direction of development, in order to adapt to the current environmental protection situation, paint exhaust gas treatment of the pre-treatment is a complete priority, treatment equipment selection is reasonable. The best, only the most reasonable. Enterprises have the conditions to do automatic spraying, must do backwind treatment, and backwind treatment of the pre-treatment also needs to be completely resolved. In addition, in the process of exhaust gas treatment, in order to further reduce wind resistance, pipeline layout, fan selection, coating process products to meet the production requirements play a decisive role, so the layout of the pipeline, fan selection must be carefully calculated and carefully calculated. picked out.
exhaust gas first comes into contact with the micro-bubbles produced by the generator in the contact area, all hydrophobic substances are adsorbed to the surface of the micro-bubbles, and then the gas rises to the upper and lower reaction zones. Micro-bubbles in the reaction zone will continue to break and break, releasing a certain amount of instantaneous energy, making the solvent volatile, while the resin and other subsidion and progress. One-step polymerization drying. Since polymerized polymer resins are almost insoluble in water, they do not contaminate the circulating water in the tank, and only resins deposited in the tank can be recycled regularly. The exhaust gas after removal of the organic solvent is processed through the filter tank to the next operation.
The effect and characteristics of paint mist separation technology
paint exhaust gas outlet direct docking equipment, is the pioneer of the entire VOCs treatment program, exhaust gas through the paint fog separation equipment, the gas has viscous paint fog removal, the general paint fog removal rate of more than 95%, the removal of viscous UV paint. 1x rate can also guarantee more than 85%, followed by simple dry filtering, to ensure the normal operation of the post-processing process.
the paint mist separation technology is different from other traditional technologies on the market. Features include the complete separation of viscous resins from organic solvents. Sticky resins are non-stick and easy to collect after inercession. Equipment maintenance is convenient, the system is free of fillers, low operating costs, no chemical additives, no secondary pollution and other consumables. Recycled powder coatings.