Evonik Solutions for sun care formulations
- Rheology effects
- Emulsion and suspension stabilization
- SPF booster effects
Sun protection is not just an issue on vacation. Sun care products are now part of the daily skincare routine for many people around the world, as they are essential for healthy skin and good looks. The requirements for this product group are increasing accordingly: Formulations need to match diverse demands, regarding different skin types, seasonal needs, protection intensity, pleasant sensory experience as well as a broad variety of product formats, ranging from sun care lotions to sprays.
Sun care products therefore must offer more than just reliable protection against UV radiation. The acceptance of sunscreen stands and falls with applicability and sensory profile. A sticky, oily effect on the skin is most undesirable – especially, but not only when sunscreen is used on the beach. Instead, the formulation needs to be absorbed quickly and feel light on the skin Evonik’s Silica and Silicates are well-proven and trusted nature-identical ingredients for formulating highly effective and innovative sun care products which meet various needs. It improves processability, product quality and applicability of sunscreen lotions, oils, gels, sprays, or sticks, ensuring a sensory profile that pleases consumers.
Key effects are rheology related. The processing of AEROSIL ® fumed silica is very easy as it neither need heat or an activator. On the other hand, processing at elevated temperatures is not a limitation. The properly dispersed AEROSIL® creates a such kind of network. The AEROSIL® acts as an SPF-booster in sunscreen formulations by stabilizing the UV-filter in the formulation and by excellent spreadability of sun care products, creating an even protective film on the skin's surface. UV rays therefore have less surface area to attack.
Another possible benefit for product design: depending on the formulation, hydrophobic AEROSIL® grades might support water-resistance of the sunscreen.
Silica for sustainable sun care formulations
Silica is a multi-purpose raw material that has limited impact on the environment through its sourcing and production. Once a sun care product is rinsed from the skin, the silica in it is not harmful to aquatic environments or wastewater plants. Silica simply joins the geological cycle of minerals and therefore is an eco-friendly additive in sunscreen and sun care formulations. Also, hydrophilic grades come with a COSMOS certification. In addition to that, silica made by Evonik allows for vegan formulations.