Anti-graffiti coating market size




The 2013 anti-graffiti coatings market is $72 million and is expected to reach $87 million by 2023, with a compound annual growth rate of 3.8% during the forecast period.




Anti-graffiti anti-paste principle




Anti-paste and anti-graffiti materials can be classified into two types according to the form of film formation: film forming type and non-film forming type.


A film-forming material, commonly known as a coating, is applied to the surface of the substrate to be protected to form a continuous coating film having a low surface tension and capable of preventing sticking and graffiti. At the same time, it has certain anti-corrosion and anti-aging characteristics.


Non-film-forming materials are used in porous substrates, applied to absorbent surfaces such as concrete and stone, and penetrate into the pores of the substrate. Although they cannot form a continuous coating film, they can also change the surface energy of the surface of the material. The oyster sauce prevents the graffiti coating from penetrating into the substrate, acts as a graffiti-proof, and also has an anti-stick function. This type of material is also known as an anti-graffiti protectant or a water extractant.
 


Anti-graffiti anti-stick coating technology route


 
Anti-graffiti coatings are classified into sacrificial anti-graffiti coatings, semi-permanent anti-graffiti coatings and permanent anti-graffiti coatings according to their protective properties.
 
The sacrificial anti-graffiti coating is typically a paraffin emulsion or a mixture of paraffin and silicone. After the surface of the material is contaminated by graffiti, the coating is removed along with the graffiti. The characteristic of this kind of paint is that it needs to be applied again after cleaning the graffiti, which increases maintenance manpower and material resources. Typical products are the SILRES BS 601 from WACKER.
 
The semi-permanent anti-graffiti coating is an acrylic resin coating or an epoxy or polyester resin cross-linked coating which can be applied multiple times. It has a certain resistance to strong chemical cleaning agents and can withstand several chemical cleaning agents, but in the end it requires a new coating replacement. Due to the adhesion of the contaminants to the coating and the increased adhesion over time, the degree of adhesion and penetration into the coating will increase and must be cleaned with a strong chemical cleaner.
 
Permanent anti-graffiti paint has a relatively long service life. It can remove graffiti, stickers or other contaminants on the surface of the coating several times without using a safe neutral detergent or without using a cleaning agent, without losing the performance of the coating itself. .
 


The permanent anti-graffiti anti-adhesive coatings on the market are mainly classified into fluorine-modified or silicon-modified polyurethanes, fluororesin coatings, elastic silicone coatings and silicone coatings according to their chemical composition.
 
Fluorine-modified or silicon-modified polyurethane coatings are usually copolymerized with fluoromonomers and acrylate monomers, or copolymerized with silicon monomers and acrylate monomers, and then crosslinked with an isocyanate curing agent, usually a two-component system. It needs to be mixed before it can be used. In addition, some anti-graffiti resins or additives are added to achieve the anti-graffiti function. After repeated cleaning, the anti-graffiti function will decrease. Usually such coatings are solvent-based products that use more VOC emissions during construction.
 
Elastomeric silicone coatings have good anti-graffiti function and durability, but are also solvent-based products. However, the paint film is soft, the ability to resist mechanical damage is relatively poor, and it is easy to stain dust. Typical products are the SILRES IC 701 from WACKER.
 
Waterborne two-component anti-graffiti coatings are relatively low in VOC and more environmentally friendly, and their film-forming materials are usually acrylic urethanes modified with low surface energy materials. Since the emulsifier is used in the synthesis of the resin, the anti-graffiti performance is weakened, and the contamination of the water-based pen can be easily removed, but the contamination of the oil-based pen still needs to be erased with alcohol.
   
The one-component solvent-free moisture-curing silicone resin coating is a more environmentally friendly system that uses the latest technology to synthesize low-viscosity silicone resins, which can achieve lower application viscosities without the need to add solvents. It has a lower odor and a lower VOC content, and its VOC content can be less than 60 g / liter. Since the composition is 100% silicone, the high density methyl group can be oriented on the surface of the coating, so it has a particularly low surface energy. Even if the oil-based pen is painted on the surface, it can be easily wiped off with a dry cotton cloth, eliminating the risk of using a cleaning agent.
 


Graffiti is a global issue and poses a huge challenge to the coatings industry. Although graffiti can't stop graffiti, you can use some fresh and ingenious methods to deal with it. You can use surface coating, which not only protects the substrate, but also makes it easier to clean up the graffiti. Although the graffiti problem is very serious in some countries, it has not caused enough attention in the coatings industry. With the use of these coating systems, the troublesome graffiti problem can be solved to a large extent. A variety of new anti-graffiti multi-functional coatings have been successfully developed, which will undoubtedly play a significant role in the protection of urban buildings and the maintenance of city appearance.