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Application of carbon black in black paint and rubber

2020-09-22 18:20:50
The main raw materials of black waterborne paint are carbon black The basic principle is that the blackness should be good enough, and the structure should not be too low, otherwise it will affect the dispersion, and the content of oxygen-containing groups should be rich enough.
  
Water based paint has been widely used in many fields such as interior wall decoration, wood furniture and so on. Water as a solvent or as a dispersion medium of coatings, can be called water-based paint. Water based paints include water soluble, water diluted and water dispersed. In the past decade, under the increasingly strict environmental protection law, waterborne wood coatings have been increasing by 19% annually in Europe. The market share of water paint in the world is expanding year by year. Germany is 70%, the United States is 80%, and the annual growth rate is about 9%. However, the domestic water-based paint is still in its infancy, and it will have broad application prospects. In the next five years or so, water-based wood coatings will be popularized.
  
When making black water-based paint, the performance of pigment carbon black should be stable to ensure the quality.
  
The real two-component water-based paint, whether the main agent or curing agent, can hardly smell or has only a very slight smell after opening the can. 2. The real two-component waterborne paint is diluted with clean tap water. If you need a special diluent or alcohol to dilute, it must not be. 3 two component waterborne paint is also a non hazardous chemical, while fake two-component paint is often flammable. 4 see environmental protection index: whether it contains benzene heavy metals and high content of VOC and other toxic substances.
  
The dispersion of carbon black is particularly important in the production of waterborne paint, which has a certain impact on the blackness, brightness and fluidity of waterborne paint. The smaller the aggregate, the better the dispersion in the paint, the higher the gloss. Powder products without granulation treatment are often used in water-borne paint. Such products usually go through post-treatment to increase the content of chemical adsorbed oxygen groups on the surface of particles. With the increase of these oxygen-containing groups, it will give them better performance. Not only can the blackness of carbon black be greatly improved, but also the higher the level of these groups, the better the flow will be Mobility.
 
For conductive carbon black, it can make plastics have a certain conductivity, can also be used as raw materials for dry batteries, so can it be used in rubber products industry?
  
The addition of conductive carbon black in conductive plastics is a relatively new field, but the application value of conductive carbon black to conductive plastics is still relatively high. In different plastic products, the role of super conductive carbon black is also different.
  
After adding conductive carbon black into plastics, the conductive mechanism of carbon black in plastics is different due to the different filling amount and dispersion degree of carbon black. On the one hand, due to the developed structure of carbon black, carbon black particles contact with each other to form a conductive channel; on the other hand, due to the lack of carbon black particles, or after evenly dispersed, carbon black particles can not contact each other. There is a thin layer of resin between the carbon black particles to form a potential barrier, and the electrons can not flow directly. However, when there is a voltage, the electrons can conduct electricity by tunnel effect The electron must take place the electron transition at the potential barrier, forms the tunnel conduction.
  
In fact, in the process of conducting polymer composites, these two kinds of conductive mechanisms exist at the same time, but the conductivity efficiency is different. Due to the different conditions in use of conductive composites, such as AC, DC, high frequency, low frequency, electromagnetic wave shielding, etc, carbon black There are differences in their roles.
For the application of pigment carbon black in plastic primer, please read: Application of pigment carbon black in plastic primer and its purchasing standard
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