The key to improving coating durability: selection and use of special pigment carbon black

In the process of pursuing product performance in the coating industry, the durability of the coating has always been an important technical indicator. With the growing market demand for high-performance coatings, how to improve the durability of the coating has become one of the core issues in coating formula design. Special pigment carbon black (referred to as pigment carbon black) as a commonly used colorant plays multiple roles in coatings, especially in improving the durability of coatings, showing irreplaceable advantages.

1. Basic characteristics of pigment carbon black
Pigment carbon black is a fine-grained black powder produced by a special process from a carbon-based substance, with extremely high tinting power and excellent stability. Unlike ordinary carbon black, special pigment carbon black has a smaller particle size and a special surface treatment to make it more compatible with other coating ingredients. Pigment carbon black can not only effectively provide a black coloring effect, but also enhance the UV absorption capacity of the coating, improve weather resistance and anti-aging properties.

2. The effect of pigment carbon black on coating durability
Enhancement of UV resistance

Special pigment carbon black has excellent light absorption properties, can absorb and scatter ultraviolet rays, and reduce the erosion of ultraviolet rays on the coating. In an environment exposed to sunlight for a long time, ultraviolet rays are one of the main factors that cause coatings to fade, crack and age. By adding special pigment carbon black, the coating can effectively slow down the damage of ultraviolet rays to the coating and improve the weather resistance and durability of the coating.

Improve the antioxidant properties of the coating

The surface treatment of pigment carbon black is usually lipophilic, which enables it to combine well with the resin component in the coating to form a strong coating. This combination not only improves the hardness and scratch resistance of the coating, but also improves the antioxidant ability of the coating to a certain extent and prolongs its service life.

Enhance the hiding power of the coating

Pigment carbon black has excellent tinting power and high hiding power, which can effectively cover the defects and uneven surface of the substrate and improve the visual effect and surface flatness of the coating. In addition, the uniform dispersion of pigment carbon black can also improve the mechanical properties of the coating and increase the overall damage resistance of the coating.

3. Precautions for selecting and using special pigment carbon black
Particle size and dispersibility

It is crucial to select pigment carbon black with the right particle size. Carbon black particles with smaller particle size have a larger specific surface area, which helps to improve the coloring power and UV absorption capacity, but they are also easy to aggregate, resulting in poor dispersibility and affecting the quality of the coating. Therefore, it is necessary to select good dispersibility special pigment carbon black with good dispersibility to avoid problems such as rough coating surface and poor gloss.

Surface treatment and lipophilicity

The surface treatment of special pigment carbon black is the key to determining its performance in coatings. Surface treatment can improve the dispersibility of carbon black and improve its compatibility with resin, thereby enhancing the adhesion and durability of the coating. Therefore, when selecting pigment carbon black, in addition to paying attention to its particle size, its surface treatment process should also be paid attention to to ensure its adaptation to the specific coating system.

Stability of pigment carbon black

The chemical stability of pigment carbon black directly affects the long-term performance of the coating. Poor quality carbon black may contain impurities or be easily degraded under environmental factors such as ultraviolet rays and moisture, resulting in coating failure. Therefore, good chemical stability special pigment carbon black can ensure the long-term use effect of the coating in harsh environments.

The use of special pigment carbon black in coatings can not only give the coating a bright color, but also significantly improve the durability of the coating. By rationally selecting pigment carbon black with appropriate particle size, excellent surface treatment and good dispersibility, the coating's UV resistance, oxidation resistance and mechanical properties can be effectively enhanced, and the coating's service life can be extended. In modern coating formulation design, special pigment carbon black has become one of the key materials for improving coating performance. The selection and use of appropriate pigment carbon black is a key factor in achieving long-term stability of coating products under high performance requirements.