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TiO2 Dispersions for High UVB/UVA Protection without Whitening
Posted: May 5, 2010
Croda will be available at NYSCC Suppliers' Day to discuss its new titanium dioxide dispersions. Solaveil SpeXtra comprises two dispersions designed to deliver the optimal balance of UVA and UVB attenuation. These dispersions were launched at In-Cosmetics in Paris.
According to the company, Solavail XT-100 (INCI: Titanium Dioxide (and) C12-15 Alkyl Benzoate (and) Polyhydroxystearic Acid (and) Stearic Acid (and) Alumina) and Solaveil XT-300 (INCI: Titanium Dioxide (and) Caprylic/Capric Triclyceride (and) Polyhydroxystearic Acid (and) Stearic Acid (and) Alumina) meet European Commission guidelines for UVA protection while achieveing the high SPF efficacy typically expected from conventional sunscreen grades of titanium dioxide.
Larger particle size titanium dioxide reportedly delivers higher UVA protection but often has a broad size distribution, including pigment sized particles that give an unacceptable degree of whitening on skin. The company's titanium dioxide dispersions are created with particle synthesis techniques that give the optimum particle size and shape for UVA efficacy while controlling particle size distribution. The result is a material that offers enhanced UVA attenuation, coupled with a high SPF efficacy typical of conentional titanium dioxide sunscreens without excessive whitening.
The titanium dioxide dispersions are coated titanium dioxide with a mean particle size of 145 nm dispersed in a choice of carrier media. Each dispersion contains 55% solids. The company recommends the dispersions at 2–30% in sun care, skin care and color cosmetics.
The oil-based dispersions can be stirred into the oil phase before emulsification for w/o and o/w systems. They reportedly are easy to formulate with and provide excellent compatibility with other ingredients.