General knowledge of coatings: development prospect of waterborne industrial coatings

Core tip: with the increasing attention to environment and health, waterborne coatings have been more and more widely used At present, the pollution of VOC released by traditional solvent based coatings in the process of production and use has become the main pollution source in the city after the automobile In order to make the coating meet the requirements of environmental protection, the researchers focus on the research and development of replacing the traditional solvent coating These alternative coatings include: high solid coatings, waterborne coatings, powder coatings and radiation curing coatings As an alternative to traditional solvent based coatings, these coatings can Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings: with the increasing attention to environment and health, waterborne coatings have been more and more widely used At present, the pollution of VOC released by traditional solvent based coatings in the process of production and use has become the main pollution source in the city after the automobile In order to make the coating meet the requirements of environmental protection, the researchers focus on the research and development of replacing the traditional solvent coating These alternative coatings include: high solid coatings, waterborne coatings, powder coatings and radiation curing coatings As a substitute of traditional solvent based coatings, these coatings can reduce VOC emissions, reduce the generation of hazardous wastes, and reduce workers' exposure to toxic emissions Among them, water-based coating has the characteristics of convenient source, easy purification, low cost, low viscosity, non-toxic, non irritating, non combustible and so on, which has become a research hotspot Waterborne coatings were first used in the field of architectural coatings With the development of automobile, large household appliances and other industries, waterborne coatings as industrial metal anti-corrosion coatings also developed rapidly However, in the field of industrial coating, solvent-based coating dominates the world, and water-based coating only accounts for a small proportion Therefore, it has become a common task for China's coating industry to improve the proportion of waterborne coatings, especially industrial coatings, and reduce the pollution of coatings to the environment and the physical harm of construction personnel The development of waterborne industrial coatings in the three major application areas of the coating industry, waterborne coatings in two major application areas occupy a considerable proportion In 1999, the European waterborne industrial coatings have exceeded 500000 tons, and will reach 1 million tons in 2010 Water based industrial coatings have accounted for 20% of the world's industrial coatings, and will reach more than 30% by 2010 At present, European waterborne industrial coatings have accounted for 30% Even in the field of special coatings, waterborne coatings are also penetrating into the fields of automobile repair coating, anti-corrosion coating, road marking coating and so on at an unprecedented speed Developed countries in the world attach great importance to the development of waterborne coatings For example, the development of waterborne coatings in the United States accounts for more than 50% of the total development of coatings, while the development of waterborne coatings accounts for 20% of the total development of coatings From the 21st century, Japan has attached great importance to and started to develop the coatings with low environmental load, mainly waterborne coatings In recent years, China has also issued many important environmental protection regulations and implementation standards for the research, development and production of waterborne coatings As an important measure to reduce VOC emissions, waterborne industrial coatings are used in large-scale household appliances and automobile industries In particular, the waterborne of automotive primer, intermediate coat and top coat has become the development direction of global automotive coatings However, there is a big gap between the water-based level of domestic industrial coatings and developed countries The main problem faced by waterborne coatings is how to improve the performance of products on the premise of acceptable cost, to make them reach the same or close level with solvent based coatings, and further reduce VOC emissions Research background of waterborne industrial coatings with the continuous improvement of people's health and environmental awareness, the implementation of environmental protection regulations of EU and NAFTA countries, the average growth rate (agr) of waterborne coatings technology is surpassing the average growth rate of traditional solvent based coatings technology More and more successful application examples also prove that the waterborne coating can provide good corrosion resistance for steel even in bad conditions The water-based coating is not only healthy, safe and environmentally friendly, but also has short drying and coating time, low insurance cost, no diluent cost and short shutdown time (less coating and less solvent odor) Therefore, its advantages are high performance of the coating and low cost brought by efficient construction The first commercial waterborne coatings appeared in 1930s Based on its compatibility and protection to the environment, and with the advantages of saving resources and energy, it was quickly accepted by the market, and gradually developed and expanded In 1986, Japan and the United States accounted for 18% and 22% of the total paint sales respectively, while in 1995, the United Kingdom accounted for 64.5% of the total paint production in China China began to study waterborne coatings in the 1960s After entering the 1990s, the country vigorously supports the development of waterborne coatings Although the current market share is not very high, it has broad prospects for development With people's attention to environmental problems, more and more attention has been paid to the pollution and toxicity of coatings Many countries in the world have issued relevant laws and regulations, which put forward strict requirements for the environmental protection of coatings Traditional solvent based coatings contain up to 60% solvent According to statistics, at present, there is only one item of automobile paint, and about 500000 tons of organic solvents are discharged into the atmosphere every year Organic solvents are the main concern of environmental problems, because they can volatilize at room temperature and atmospheric pressure In the workshop, solvent gas can cause fire, explosion and other hazards, so it should be properly stored and operated VOC and dangerous air pollutants are released by solvents into the atmosphere VOC combines with nitric oxide in sunlight to form ground level ozone Ground level ozone is a precursor of smog and a major source of pollution in urban and industrial areas Therefore, the development of waterborne coatings not only solves the environmental pollution, but also saves a lot of solvents As we all know, European and American countries, especially the European Union, attach great importance to environmental protection They have successively formulated some environmental protection regulations to limit the release of VOC into the atmosphere, such as directive.99/13/ce of the European Union, at Luft of Germany (air purification law, 1992), 66 of the United States Laws and regulations, CAA (air cleaning law, 1970), CAAA (air cleaning law amendment, 1990), ROHS directive implemented by EU in recent years, and trade barriers on environmental protection set up by western countries for trade protection will promote the development process of environmental protection coatings in China, especially waterborne coatings At present, many of our country's industrial products exported to western developed countries have begun to use environmental friendly water-based coating construction In addition, the recent major river and lake pollution and export products pollution and poisoning events have prompted China's high-level leaders to make great determination to pay attention to the protection of the ecological environment A series of measures, such as the strengthening of energy conservation and emission reduction, the upgrading of the State Environmental Protection Administration to the Ministry of environmental protection, the formulation and promulgation of compulsory standards for environmental protection and safety of relevant domestic products, show that the Chinese government attaches great importance to environmental protection, and at the same time, the atmosphere of attaching importance to environmental protection and life has been formed in China On the other hand, the government's concern for the people's livelihood, the attention and improvement of all kinds of labor security will also arouse the workers' attention to the working environment and labor protection In the future, the coating construction of toxic and harmful solvent coating will face the problem of shortage of personnel and increase of construction cost In the future, the application of solvent based coatings which pollute the environment and harm the health of construction workers will be more and more restricted, which will provide a good development space for water-based coatings In the field of industrial coating, it is still solvent based coating that dominates the world, while water-based coating only accounts for a small proportion Therefore, it has become a common task for China's coating industry to improve the proportion of waterborne coatings, especially industrial coatings, and reduce the pollution of coatings to the environment and the physical harm of construction personnel At present, there is a certain gap between domestic and foreign research and development level of waterborne industrial coatings As a research and development personnel, our task is to make the cost and performance of waterborne industrial coatings reach the same or close level with solvent based coatings Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, 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