Titanium dioxide is the most critical white pigment in the coatings industry, playing three core roles: optimizing optical properties, providing durable protection, and enhancing physical performance of coatings.
Core Optical Functions
High hiding power: Titanium dioxide has an extremely high refractive index and can strongly scatter light. 1 gram of titanium dioxide can cover an area of about 450 square centimeters, completely concealing the color and defects of the substrate to present a uniform coating appearance. Its required dosage is only 1/3 of that of traditional lithopone.
Strong tinting strength: It provides a pure high-whiteness base color, making the colors of various tinted paints more vivid and saturated, greatly reducing the consumption of colorants and lowering the color-matching cost.
Gloss enhancement: It makes the coating surface brighter and smoother, significantly improving the decorative effect of coatings, and is widely used in high-end products such as high-gloss exterior wall paints and automotive topcoats.
Durable Protection Functions
Excellent weather resistance: Rutile titanium dioxide can efficiently absorb and scatter ultraviolet rays, greatly reducing the damage of UV radiation to the resin components in coatings. It prevents the coating from chalking, yellowing and fading, enabling exterior wall coatings to maintain a stable appearance for more than 10 years.
Anti-corrosion barrier: Titanium dioxide particles fill the gaps between coating molecules to form a dense protective structure, blocking corrosive media such as moisture, acids and alkalis from penetrating the coating, protecting the substrate from erosion and extending the service life of anti-corrosion coatings and industrial paints.
Superb chemical stability: Titanium dioxide itself is extremely chemically inert and will not react adversely with other components in the coating, ensuring that the coating will not experience delamination, discoloration and other problems during storage and long-term use.
Physical Performance Enhancement Functions
Improve mechanical strength: Titanium dioxide particles can increase the hardness and wear resistance of the paint film, reduce the generation of scratches on the coating surface and prevent the coating from cracking.
Optimize construction performance: Surface-modified titanium dioxide can be uniformly dispersed in the coating system, avoiding construction defects such as particle agglomeration and flow marks, and improving the brushing uniformity and film-forming quality of the coating.
Enhance adhesion: It strengthens the bonding force between the paint film and the substrate, making the coating less prone to peeling and flaking, and further improving the overall stability of the coating system.