Anatase Titanium Dioxide CAS 13463-67-7

Introduction to Anatase Titanium Dioxide

Anatase Titanium Dioxide is a white inorganic pigment with a tetragonal crystal lattice, where titanium atoms are coordinated with six oxygen atoms in a distorted octahedral arrangement. This specific crystal structure defines the material’s optical and physical properties in industrial formulations. It exhibits a high refractive index and strong light scattering capability, absorbing UV light while reflecting the visible spectrum to produce a bright white appearance with a distinct bluish undertone.

The material remains chemically inert in most solvents and aqueous systems, dissolving only in hot concentrated sulfuric acid or hydrofluoric acid. It is widely used to impart opacity and brightness to waterborne paints, paper coatings and synthetic fibers, with lower Mohs hardness than rutile grades for reduced equipment wear.

Anatase Titanium Dioxide Chemical & Physical Properties

Applications of Anatase Titanium Dioxide

Interior architectural paints: Dispersed at 10–25% in waterborne acrylic or vinyl emulsions. It provides high hiding power and bright bluish whiteness for interior finishes. Formulators often add stearic acid during milling to improve hydrophobicity and dispersion stability in the resin matrix.

Papermaking fillers and coatings: Added at the wet end or coating color to increase paper opacity and brightness. Its low abrasiveness protects paper machine wires and felts from excessive wear. Mills use sodium polyacrylate as a dispersant to prevent flocculation and ensure uniform light scattering across the paper web.

Rubber and synthetic fibers: Incorporated at 2–5% to whiten rubber compounds and deluster synthetic fibers like polyester and nylon. Fine particles scatter light evenly, reducing the unnatural gloss of extruded filaments and producing a matte, natural appearance.

Storage & Safety Precautions for Anatase Titanium Dioxide

• Store pallets in a dry warehouse below 35 °C. Moisture absorption causes powder agglomeration and increases milling time. Use dehumidifiers to maintain low ambient humidity for consistent flowability.
• Use local exhaust ventilation and wear N95 respirators during bag slitting and bulk transfer. Fine powder poses a nuisance dust hazard; avoid prolonged inhalation and eye contact.
• When dispersing into waterborne systems, pre-mix the powder with wetting agent and water before adding to the high-shear mill. Dumping dry powder directly into thick resin pastes traps air and creates hard seed agglomerates.

Anatase Titanium Dioxide FAQ

Q: How does Anatase Titanium Dioxide improve interior paints?

A: It delivers exceptional whiteness with bluish undertones for bright interior finishes. Its high refractive index provides excellent hiding power, reducing pigment loading, and it disperses easily into waterborne acrylic systems for smooth application.

Q: Why is Anatase Titanium Dioxide preferred for papermaking?

A: It offers high opacity and low abrasiveness, protecting paper machine wires and felts from wear. Its fine particle size and low hardness produce smooth paper surfaces, and it works well with dispersants for uniform brightness in premium grades.

Q: Does Anatase Titanium Dioxide cause chalking in outdoor coatings?

A: Yes. It exhibits strong photocatalytic activity under UV exposure, degrading organic binders and causing rapid chalking on exterior surfaces. For outdoor coatings, use rutile grades or apply heavy silica-alumina surface treatments.