Anjeka 4340A for Orientation and Anti-Settling in Automotive Metallic Paints

In automotive exterior design, metallic paints have become a key element for expressing individuality and quality, thanks to their unique sparkling texture, deep layering, and captivating flip-flop effect. However, achieving this ideal visual effect presents formulation engineers with two core challenges: the "mottling" defect caused by the disordered arrangement of effect pigments (such as aluminum and pearlescent flakes) within the paint film, and pigment settling during storage. This not only affects the final coating's appearance consistency and luxury feel but also introduces instability in production and application.

The visual appeal of a car's metallic finish stems from the near-parallel orientation of countless tiny aluminum or pearlescent flakes to the substrate within the paint film. This alignment maximizes light reflection, producing a uniform, intense metallic sparkle and color that shifts with the viewing angle (flip-flop effect). Conversely, if the flake orientation is chaotic, it leads to localized uneven brightness, causing what is commonly known as "mottling" or "cloudiness," severely compromising the overall appearance.

Simultaneously, due to density differences with the medium, these flake pigments are prone to settling during storage. Severe settling results in poor can stability, requiring prolonged stirring for recovery, and may lead to hard sediment that cannot be fully redispersed, ultimately affecting the paint film's performance and appearance. Therefore, an excellent automotive metallic paint additive must optimize both the "optical arrangement" and "physical suspension" of the pigments.

Anjeka-4340A is a dispersion based on ethylene-vinyl acetate copolymer wax (EVA), specifically designed for solvent-based automotive coating systems. Through its unique wax crystal structure, it effectively guides and fixes flake effect pigments like aluminum and pearlescent flakes during the paint's drying and film formation process, promoting their parallel orientation.

• Precise Orientation, Enhanced Visuals: By promoting regular pigment arrangement, Anjeka-4340A can significantly enhance the flip-flop effect of metallic paints, making the color richer and more dynamic with changing viewing angles, while effectively preventing mottling caused by inconsistent pigment orientation, ensuring a uniform, luxurious, and high-end appearance of the paint film.
• Network Support, Prevents Settling: In the liquid coating system, Anjeka-4340A can form a fine network structure, imparting a degree of thixotropy to the system, thereby slowing down the settling speed of effect pigments in the can. This not only improves the product's can stability, reducing the intensity and difficulty of pre-use stirring but also enhances the product's stability during warehousing and transportation, ensuring batch-to-batch consistency.

1. Specialized for Automotive Coatings: The product development is highly targeted, specifically recommended for solvent-based automotive metallic basecoats and single-layer metallic topcoats, demonstrating an understanding of this field's high demands for ultimate appearance and stability.
2. Dual Benefits, Multiplied Value: A single additive simultaneously addresses the two key issues of "orientation control" and "in-can anti-settling," simplifying formulation design, improving formulation efficiency, and delivering application value greater than the sum of its parts.
3. Compatibility and Process-Friendly: Suitable for common solvent-based automotive coating systems. Its addition method is proven: after pre-activation via high-speed stirring, it can be conveniently added during production. For systems containing CAB, there are clear guidelines on the addition sequence to ensure optimal performance.
4. Controlled Quality, a Trusted Choice: The product provides clear in-house test methods for cleanliness (dried film should be transparent and particle-free) and fineness (≤20μm), ensuring the product's high purity and batch stability, providing a foundation for stable production for downstream customers.

• Recommended Systems: Solvent-based automotive coatings, especially metallic basecoats and metallic topcoats pursuing high sparkle and strong flip-flop effects.
• Dosage and Method:
  • Dosage: Typically 5-15% based on the total formulation (as supplied), or 80-150% relative to the aluminum paste content. The optimal dosage should be determined through experimentation.
  • Method: It is essential to stir at high speed for 15-30 minutes before use to restore it to a uniform, flowing liquid, then filter before use. In systems containing CAB, it is recommended to first disperse the CAB solution uniformly with the resin solution at high speed, then add the pre-treated Anjeka-4340A wax paste
• Storage Reminder: Store in a cool, well-ventilated place (0-40°C). If the product surface dries out due to improper container sealing, remove the dried portion before use to avoid affecting dispersion.

The aesthetics of automotive coating begin with the sophistication of formulation design. Anjeka-4340A is more than just an additive; it is a reliable partner in achieving stable, brilliant metallic paint effects. By precisely controlling effect pigments from storage through film formation, it helps paint manufacturers and automakers jointly create luxurious finishes with outstanding visual performance and consistent quality. Choosing Anjeka-4340A is choosing a firm commitment to excellent appearance and stable quality.