When it comes to water -based paint, everyone doesn’t feel strange. Indeed, since the transformation of water paint, companies have begun to rectify the rectification project, and furniture manufacturers and consumers have also faced new choices. Water -based paint has become a hot vocabulary for a while.
Water -based paint decorative furniture
However, there are a lot of voices pointing out:
Does water -based paint have their tables?
Is the Volkswagen’s pursuit too blind?
Can water -based paint really replace the paint?
So, do you really understand water -based paint?
01 Where does the water paint come from? What is the development?
Water -based paint first appeared during World War II and was successfully developed by Germany. According to data, the use of water -based coatings in Europe has reached 80%, and since 2004, the EU has banned production, sales and use of paint. In China, the use of water -based paint is still very low, and developed cities such as Beijing and Shanghai have only reached 30%, showing a cold pattern of the industry’s hot market.
The first generation of water -based water paint is based on acrylic acid. Its advantage is that water resistance and weather resistance are good, but the physical chemical properties are poor. It is the main product of current water -based paint production enterprises to the market.
The second -generation products were rapidly promoted and commercialized in Northern Europe in 1980. The complex of acrylic acid and water -based polyurethane is the main raw material, which improves the hardness of water -based paint, but the chemical performance is still relatively low.
The third -generation water -based paint is based on acrylic acid and modified water polyurethane as the main raw material. The hardness can fully meet the needs of Nissan, and the chemical properties have become stable. The technology is currently monopolized by a few manufacturers at home and abroad.
02 What are the advantages of water paint?
The biggest advantage of water-based paint is environmental protection, but it does not mean that it does not contain organic solvents. Its organic solvent content is 10%-15%, and the organic solvent content of the solvent-based paint is about 80%. Paint can reduce VOC emissions from 45g/㎡ to 7g/㎡.
03 What is the most fundamental difference between water -based paint and oily paint?
The most fundamental difference between water -based coatings and oily coatings is that the former’s diluent is water, and the latter is an organic solvent. Because water and organic solvents are different things, the performance of the corresponding coatings is very different, which also causes process differentiation.
Comparison of water and some organic solvents
From the figure above, we can see that the surface tension of water is high, which is like a double -invisible hand preventing the combination of the contact with the substrate, so it is not conducive to eliminating bubbles, and the film formation is prone to disadvantages. The evaporation potential of water is 5-8 times that of most organic solvents. It has a long drying time. It is easy to cause a “sticky board” phenomenon before drying. And because of the hydrophilic group, the paint film has a large hydrophilicity, and after painting, it has fatal shortcomings such as easy back, white, and poor water resistance.
The existence of these factors shows that the development of water -based paint must be a process of twists and turns. The quality upgrade is imperative!
04 How to achieve the profit -seeking and avoiding harm of water -based paint painting?
1. Ensure that the water content of the board is stable, and the water of too low coatings can be easily absorbed and causes problems such as lack of coating. If it is too high, it will also affect the adhesion. Each time it is applied to enter the drying room, ensure that the water content is stable, and the temperature should not be too high. It is controlled between 40-60 ° C.
2. Water -based paint has strong fluidity, and the atomization effect will be greatly affected. You need to use a special water spray gun and a dedicated oil pump.
3. Because water -based paint is slow to dry, it is easy to be polluted by floating dust, and dust pollution needs to be reduced.
Here, everyone must be tired. In the final analysis, the environmental performance of water -based paint is indeed undeniable, so let’s appreciate some exquisite water -based paint children’s toys together!
The market prospect of water -based coatings is huge. For many domestic coating companies, it is currently increasing R & D efforts and continuously improving and improving performance. At the same time, it is also important to popularize healthy home decoration consumption concepts!
Finally, I want to say: Whether it is water -based paint or oily paint, it is reliable and healthy for environmental protection standards.