Titanium Dioxide
A white, opaque pigment and functional additive widely used in automotive paints, coatings, and plastics to provide brightness, UV protection, and durability.
Overview
Titanium dioxide (TiO₂) is one of the most important industrial minerals in automotive manufacturing, primarily valued for its exceptional whiteness, opacity, and UV-blocking properties. It is the dominant white pigment used in automotive paints and coatings, providing the base for virtually all vehicle colour formulations — even in coloured paints, TiO₂ is blended in to achieve the required opacity and finish quality. Beyond pigmentation, TiO₂ is used as a functional additive in automotive plastics and rubber components to improve UV resistance and prevent degradation. It also appears in glass coatings and as a photocatalytic agent in self-cleaning and anti-fogging surface treatments. Two main crystal forms are used industrially: rutile (preferred for coatings due to superior opacity and durability) and anatase. The material is produced from ilmenite or rutile mineral sands through the sulphate or chloride process.
Automotive Applications
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Properties
Category
Type
Metal Oxide
Available Colors
Available Forms
Key Properties
- Extremely high refractive index (2.55–2.70)
- Superior whiteness and opacity
- Excellent UV absorption and blocking
- Chemically inert and non-toxic
- High temperature stability
- Good compatibility with resins and polymers
Technical Specifications
Density
3.9–4.2 g/cm³ (rutile)
Temperature Resistance
Up to 1,800°C (melting point)
Sustainability
Sustainability Rating
Titanium dioxide production is energy-intensive and the sulphate process generates significant acidic waste streams. The chloride process is cleaner but requires high-purity feedstocks. There are ongoing debates about the safety of nano-sized TiO₂ particles, and the EU has classified it as a suspected carcinogen when inhaled in powder form. Industry efforts focus on reducing waste, improving energy efficiency, and developing safer nano-particle handling protocols.