Stabilized Avobenzone Broad-Spectrum UV-A Sun Blocker
Exposure to the sun is responsible for major detrimental health effects with increasing incidence of skin cancer, sunburns and photo allergies. Sunscreens containing avobenzone, the organic molecule that absorbs UV rays in sunlight, undergoes photodegradation and needs to be replaced periodically, usually every 2 hours, and other molecules are often added to provide stability.
AvoStabil© introduces a new technology of UV skin protection to improve the environmental lifetime, effectiveness and cost performance of avobenzone with whole wavelength range protection. This composite material system encapsulates the avobenzone in a collodial nanozeolite that both serves as the host for the organic sun blocker and scatters sunlight. Encapsulation of the avobenzone increases its stability and minimizes skin contact. The uniqueness of our product is the combination of both sun blocking and sunlight scattering into a composite photostable material.
The benefits of our composite system are:
Avobenzone decomposes upon sun exposure. By encapsulating it in the collodial zeolite, stability is indefinitely improved. At the same time, toxic photodecomposition products as well as photostabilizers of avobenzone are eliminated.
Avobenzone can be toxic with skin contact. Encapsulating avobenzone decreases the toxicity of sunscreen product.
Combined UV-A and UV-B Protection
In our product, encapsulation results in the red shift of UV absorption of the organic sunblocker. Scattering by AvoStabil© also enables UVB protection from sunlight.
|Product Type||Hydrophobic Powder|
|Particle Size:||100 – 150 nm|
|Chemical Composition:||15 wt% avobenzone in AvoStabil©|
Performance of AvoStabil©
Molecular formula of the active enolic form of avobenzone
Profile of light used to study photodecomposition of avobenzone.
› Light intensity enough to produce erythema in 3 minutes ‹
Avobenzone decomposes completely in 4 hours of photolysis (decomposition observed within the first 15 minutes)
Photolysis of AvoStabil© for 12 hours, indicating stability upon encapsulation (4 overlapping spectra taken at 0, 3, 9 and 12 hours)