Compound antioxidants: "Beautician" in the paint industry

In the colorful world of paint, there is a magical substance, which is like a skilled beautician, silent but can make the paint shine with charming brilliance. It is a compound antioxidant. Maybe you are unfamiliar with this name, but its function cannot be underestimated. Compound antioxidant is a chemical additive made up of scientifically proportioned multiple antioxidant ingredients. It is like a "shield" in paint, which can effectively prevent the paint from aging due to oxidation, thereby improving its appearance quality and service life.

What are compound antioxidants?

Compound antioxidant is a highly effective antioxidant composed of two or more single antioxidants through reasonable combination and optimization. Its main function is to delay or inhibit the oxidative degradation process of polymer molecules in the coating, thereby maintaining the stability of the color, gloss and physical properties of the coating. This is like putting a bulletproof vest on the paint, which can still maintain its original beauty under the attack of the external environment.

The importance of composite antioxidants

With the development of technology and the improvement of people's aesthetic concepts, paints not only need to have basic protection functions, but also need to have lasting aesthetics. In this process, the effect of compound antioxidants is particularly important. It can prevent the paint from deteriorating under harsh conditions such as ultraviolet rays and oxygen, extend the service life of the paint, and at the same time improve the processing performance of the paint, making it easier to construct and maintain.

Classification and Characteristics of Complex Antioxidants

There are many types of composite antioxidants, each with its unique characteristics and scope of application. According to their mechanism of action and chemical structure, composite antioxidants can be divided into the following categories:

Main antioxidant

The main antioxidant mainly terminates the chain reaction by capturing free radicals, thereby achieving the purpose of antioxidant. They usually have high thermal stability and can effectively function under high temperature conditions. For example, phenolic antioxidants are a common primary antioxidant, and they are known for their excellent antioxidant properties and good compatibility.

Phenol antioxidants

Auxiliary antioxidants

Auxiliary antioxidants reduce the formation of free radicals by decomposing hydroperoxides, playing a synergistic antioxidant effect. Thioester antioxidants are a typical example, which can significantly improve the heat and weather resistance of the coating.

Thioester antioxidants

Other types

In addition to the above two categories, there are also some special composite antioxidants, such as phosphorus-based antioxidants and metal ion passivators, which each have unique mechanisms of action and application fields.

Application of composite antioxidants in coatings

Composite antioxidants are widely used in coatings, covering almost all types of coating products. Whether it is latex paint for interior decoration, anticorrosion coatings for outdoor buildings, or even high-performance topcoats in the automotive industry, composite antioxidants can be seen.

Interior Decoration Paint

For interior decorative coatings, composite antioxidants not only prevent the coating from turning yellow due to long-term exposure to oxygen in the air, but also enhance the coating's wear resistance and stain resistance, so that the walls always remain fresh and bright.

Exterior wall coating

Exterior wall coatings face more stringent environmental tests, such as strong UV exposure and frequent temperature changes. Compound antioxidants play a crucial role here, which can significantly improve the weather resistance and anti-aging ability of the paint, so that the facade of the building remains bright in color all year round.

Auto paint

In the field of automotive coatings, the application of composite antioxidants has reached the extreme. Since automotive coatings need to withstand friction during high-speed driving, complex weather conditions and erosion from various chemicals, the requirements for composite antioxidants are also higher. SuitableCompound antioxidants can greatly extend the service life of the automotive coating and keep the body as smooth as new.

Conclusion

Although composite antioxidants do not directly impart color to the paint like pigments, nor do they build the basic skeleton of the paint like resins, they are an indispensable part of the paint system. It silently protects the quality of the paint, allowing each layer of coating to show a good condition. As the old proverb says, “Details determine success or failure.” Compound antioxidants are the key details in the paint world that add more color and texture to our lives. Let us look forward to the fact that in the days to come, compound antioxidants can bring us more surprises and changes.

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