Titanium Dioxide (TiO₂) is the most commonly used whitening agent in paints, plastics, rubber, and printing inks. However, whiteness is only part of the equation. To properly assess the quality of TiO₂, it’s essential to consider three core technical aspects. They are production process, surface treatment, and dispersion in various systems. Below is an analysis of each factor and its impact on real-world application performance.
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1. PRODUCTION PROCESS – DETERMINES PURITY
There are two main processes for producing TiO₂ which are chloride and sulphate. The chloride process generally yields a purer product with fewer metallic impurities, offering higher whiteness and UV durability. It is best suited for applications requiring outdoor colorfastness, automotive coatings, or high-end engineering plastics.
Meanwhile, the sulphate process is more cost-effective and provides better tint control, commonly used for interior paints, inks, or standard products.
2. SURFACE TREATMENT
To enhance the application performance of Titanium Dioxide (TiO₂), especially in industries like coatings, plastics, and inks, TiO₂ particles are typically treated with both inorganic and organic coatings. This improves dispersibility, color durability, and compatibility with base systems.
2.1. Inorganic Treatment
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Silica (SiO₂): Enhances optical brightness, reduces moisture absorption, and improves dispersion in water-based coatings.
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Alumina (Al₂O₃): Enhances surface smoothness, limits adverse interactions with additives, and improves slip properties for smoother application.
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Zirconium (Zr): Improves ion resistance and stabilizes TiO₂ in environments with fluctuating pH, especially mildly acidic or alkaline systems.
These inorganic coatings also act as a protective barrier, minimizing TiO₂’s photocatalytic activity. TiO₂ can absorb UV light and engage in photocatalytic reactions that generate hydroxyl and peroxide radicals—agents that degrade polymer films, causing material aging. Inorganic coatings limit UV exposure to the TiO₂ core, helping prevent damage to organic coatings and enhancing weather resistance.
2.2. Organic Treatment
After inorganic treatment, TiO₂ is often coated with organic compounds like silane or polyol to improve compatibility with oil-based or resin-based systems. Organic layers enhance wetting ability, reduce clumping during mixing, and improve dispersion in non-polar or solvent-based environments.
TiO₂ products with multi-layer treatments—combining both inorganic and organic coatings—typically exhibit superior color stability, consistent dispersion, and minimal flocculation, making them ideal for technical formulas requiring long-term stability.
3. DISPERSIBILITY
Dispersibility directly impacts coverage, stability, and processing time. High-quality TiO₂ typically has a narrow particle size distribution, is free from agglomeration, and easily achieves Hegman fineness ≥6. This reduces resin consumption, enhances gloss, minimizes pigment usage, and prevents white specks on final products.
4. CONCLUSION
Vichem is the official distributor of BOOM, TINOX, and WHITEARROW Titanium Dioxide products in Vietnam, specializing in high-quality TiO₂ supply. As an authorized distributor, we offer:
✅ Full technical documentation (TDS, MSDS)
✅ Support with formulation and real-world sample testing
✅ Coverage testing sheets and troubleshooting support
For more information about the products, please contact us through the following channels:
📞 Hotline: 0817 901 790
📧 Email: contact@vichem.vn
🔎 LinkedIn: Vichem JSC
🌐 Website: www.vichem.vn
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