What type of fluorescent whitening agent is used on hot melt coatings?

Top road hot-melt coating, also known as road marking coating, is very important for its reflective stability due to its use in roads. The stronger the reflective effect, and the higher the refracted brightness at night or in rainy or foggy weather. Road markings play a role in guiding and safeguarding roads, so product quality must meet standards. In the production process of hot-melt coatings, many additives are usually added to meet various requirements, among which fluorescent whitening agents play a role in whitening and brightening hot-melt coatings.

Due to the extremely special usage scenarios and strict requirements of hot melt coatings, there are also high demands when choosing whitening agents. When selecting whitening agents for hot melt coatings, it is required that the whitening agent has very good solubility and dispersibility. In addition, weather resistance is more important. For example, road markings need to be exposed to wind, sun, and traffic all year round. If the weather resistance of the whitening agent is not good, the marking color will turn yellow and the reflection coefficient will decrease, which can easily cause safety hazards.

Among numerous whitening agents, the one that can meet the above requirements is fluorescent whitening agent OB. The melting point of fluorescent whitening agent OB is between 196-203 ℃, which can meet the high temperature requirements during the production of hot melt coatings. Moreover, its blue light effect is very excellent, and usually the stronger the blue light, the more significant the whitening effect. Moreover, the whitening agent OB has good compatibility in different matrices, excellent dispersibility and solubility, and strong weather resistance, making it the top choice for whitening agents in Yunnan hot melt coatings.

Fluorescent whitening agent OB is used in hot melt coatings in very small amounts, usually only about 200-300g per ton, which is cost-effective for manufacturers. In addition, fluorescent whitening agent OB can absorb ultraviolet light, which can not only improve the brightness of hot melt coatings, but also effectively enhance the weather resistance of products and extend their service life.

However, Top Road hot melt coating manufacturers recommend choosing high-quality pure powder when selecting whitening agent OB, as the whitening agent market is currently quite chaotic and hot melt coatings have strict requirements for whitening agents. Once the quality of the chosen whitening agent is not high, it will have a significant impact on the hot melt coating. Therefore, when choosing whitening agents, it is more reliable to choose experienced whitening agent manufacturers.

Our company is a professional manufacturer of road hot-melt coatings, road retroreflective measuring instruments, and road marking machines. If you are interested, please feel free to communicate with me via email at any time export@toproadtraffic.com