Generally speaking, the discharge of traditional paint is cleaner, mostly naturally degradable substances and water, so as to achieve the purpose of environmental protection. However, it should be noted that some inferior water-based paints will lead to more problems, which are mainly caused by its cumbersome process, but also related to the self-discipline of enterprises, in this regard, we need more guidance. Water-based paint is not completely environmentally friendly, for people, no matter what kind of paint paint is harmful, but it can be determined that the impact on the environment is already very small compared to traditional coatings, especially water-based paint is constantly iteratively updated, each generation of products pay attention to the improvement of environmental performance. Due to the presence of zinc powder, waterborne epoxy zinc-rich coating can effectively protect the box cathodic protection, delay the corrosion progress of the box, and prevent the paint film from falling off caused by bumps, so the system has been unanimously recognized by the industry.
Waterborne container coatings also have certain limitations, such as: high cost, high construction environment requirements, such as temperature, humidity, ventilation, etc. will affect the performance of the coating, its own construction performance is also relatively poor, workers are difficult to master. Due to the poor quality of this generation of products and the difficulty of construction, it will cause great difficulty in promoting water-based paint in China in the future, as long as workers who have been in contact with such water-based paint will habitually resist. The more products are sold, the more difficult it is to promote water-based paints. Temperature difference, one of the biggest shortcomings of water-based refinish paint lies in the strict requirements for temperature, working between 5~35 °C, which is a huge challenge for construction. This leads to a series of problems, such as storage and transportation problems, and risk control. Paint film, water-based paint film is thinner than oil-based paint, which means that it is easy to be scratched. Water-based paint is also easy to crack, good quality water-based paint does not have such problems, good quality water-based paint, the gloss and fullness of the paint film is not as high as the paint; The wear resistance is not as high as paint, and it is not suitable for use on desktops and writing surfaces, suitable for cabinets, doors, etc. The hardness of some water-based paints does not reach the level of oil-based paint, so it is necessary to apply several times more than oil-based paint, and the construction technical requirements are higher than oil-based paint. Domestic construction environment, domestic paint construction is often more extensive, most workers like high pressure, low viscosity spray painting, so that the waste of paint is the largest, for paint, easy to cause dry spray, for water paint, easy to cause pockmarks. Energy consumption, which requires more energy than traditional paint; Sewage treatment, because water-based coatings contain a certain amount of water-soluble substances, so the wastewater of the water-based spraying process is more difficult to treat than the wastewater of the solvent-based process. However, relatively speaking, the concentration of container coating is very high, and the sewage can be treated centrally. In practical applications, waterborne paints have high requirements for the surface cleanliness of the construction process and materials, and the water resistance is a bit poor. This has led many people to abandon this paint in the renovation.
Overall, China's waterborne coatings demand is about 1.89 million tons, accounting for less than 10% of the coating industry, with the acceleration of waterborne coatings in steel structures, furniture, containers and other fields, it is expected that by 2022, China's waterborne coatings market demand will reach 6.34 million tons, with a compound growth rate of more than 20%. The launch of the "oil to water" policy has brought benefits to waterborne coating enterprises, and it is believed that the popularization and application of waterborne coatings in China will make long-term progress.
