Recent in UV Filter (page 2 of 3)

Research Pathways to Photostable Sunscreens

This article provides a visual depiction of pathways that UV filters undergo when exposed to solar radiation; such pathways often lead to photo-instability. A fluorescence technique is described that has led the author to identify compounds that preserve photostability in a novel manner­— by quenching the UV filter’s singlet excited state.

Chitin Nanofibrils for Improved Photoprotection

Chitin nanofibrils (CN) are capable of interacting with cosmetic actives by binding to the stratum corneum, thus influencing their thermodynamic activity. Here, the authors test various sunscreen samples and determine that the addition of CN provides an interesting boost to the photoprotective activity of sunscreens.

A Diester to Protect Hair from Color Fade and Sun Damage

A new broad-spectrum UV filter to protect hair from color fading and integrity damage, quaternium-95 (and) propanediol, has been developed for rinse-off formulations. Shampoos and conditioners containing this material protected dyed hair against surface tryptophan degradation and tensile strength reduction.

Ingredient Profile: Titanium Dioxide

While TiO2 is often incorporated as a colorant and an opacifier in cosmetics and personal care products, its most important applications are as a sunscreen active and as a component of specialty pigments for color cosmetics.

A Melanin Derivative to Shield the Skin from High Energy Visible Light

High energy visible (HEV) light recently has been suspected of causing as much damage as UVA and UVB combined. Thus, the present paper describes a fractionated melanin tailored to absorb light in the visibile 400–500 nm range. In addition, because the material exhibits color, the authors focus on formulation techniques to incorporate it into semi-solid formulations.

Au Naturale Nanoparticle Sun Protection

In 1876, Charles Darwin observed the secretion of yellow matter from the rootlets of ivy. Little was known about the material until 2008, when Mingjun Zhang, PhD, an associate professor of biomedical engineering at the University of Tennessee, and his research team found nanoparticles in the yellow matter.

Silicon Microspheres as UV, Visible and Infrared Filters for Cosmetics

Silicon microspheres are described as UV, visible and infrared (IR) radiation filters. Parameters of these spheres including shape, smoothness, refractive index and size are examined for their potential benefits in cosmetic formulations. Finally, the ability of the spheres to block IR radiation is evaluated for thermo-regulatory effects.

Meeting the UVA Challenge: Inorganic-only Sun Protection

The production of a range of titanium dioxide-based dispersions is explored to provide enhanced UVA protection, in comparison with ultrafine titanium dioxide. Formulations containing these dispersions as the only active are shown to achieve a UVA protection factor that is 1/3 of the labeled SPF value, thus meeting European Commission recommendations.

Ingredient Profile—Ethylhexyl Methoxycinnamate

Ethylhexyl methoxycinnamate (EHMC) is among the most frequently used organic ultraviolet (UV) filters, known primarily for its role as an active ingredient in sunscreen products.

Micron-sized Zinc Oxide Dispersion for Transparent High SPF Formula

Regulatory bodies require quantifiable, photostable UVA protection for sunscreens and while zinc oxide provides an effective option, historically, its white appearance on skin has limited its acceptance. Therefore, in the present article the authors explore a micron-sized zinc oxide dispersion technology to enable the formulation of transparent yet full spectrum sunscreen formulas.

Singlet Quenching Proves Faster is Better for Photostability

The faster a photostabilizer works, the fewer opportunities for destructive chemical reactions. Here, the author describes a new photostabilizer, ethylhexyl methoxycrylene, which acts by quenching the singlet excited state of UV filters. The data shows how this material sets a new standard for the photostabilization of avobenzone, even in the presence of octyl methoxycinnamate.

Silane-coated Titanium Dioxide Dispersion for Protection and Skin Feel

Croda combines UV protection with a desirable skin feel in its latest launch.

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