Science
Mechanism of Action
This ingredient functions by organizing into a hydrophobic micro-matrix on the skin's surface. It encapsulates UV filters and pigments, preventing their migration or dilution, while simultaneously smoothing the skin texture and reinforcing the natural moisture barrier to reduce transepidermal water loss.
Research
Clinical Evidence
High confidence2.5%
Key findings
- 01 In vivo testing at 1.0% demonstrated a significant measurable increase in the stability and water resistance of sunscreen films using UVA-induced fluorescence tracking.
- 02 Formulations utilizing 2.5% as part of an emulsification system successfully achieved SPF 50+ ratings, providing high uniformity without altering the product's viscosity.
Transparency
Dusting Analysis
To achieve functional water resistance and film stability, at least 1% is required. Many mass-market products claim water resistance while using negligible amounts that fail to form a continuous protective matrix.
The Formula
Formulation
Stability
Supplied as a water-dispersible emulsion that is cold-processable. It is highly versatile for low-viscosity applications like sprays or gels as it does not require neutralization.
Synergies
- UV Filters (organic and inorganic)
- Iron Oxide Pigments
- Hydrophobic Emollients
Conflicts
- Cationic surfactants
- Temperatures exceeding 55°C during post-addition
Safety
Safety Profile
The CIR Expert Panel confirmed its safety profile for dermal leave-on applications up to 25%, noting it is non-irritating when formulated correctly.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential polymer for ensuring the integrity and longevity of high-SPF sunscreens and decorative cosmetics.
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References
Sources