Science
Mechanism of Action
This polymer functions via a 'thermal switch' mechanism; when applied to the skin (transitioning to 32-35°C), it shifts from a crystalline to an amorphous state. This phase change allows for the precise, uniform spreading of actives—particularly UV filters—and creates a breathable, water-resistant matrix that improves ingredient retention without clogging pores.
Research
Clinical Evidence
High confidence2%
Key findings
- 01 Demonstrated efficacy as a side-chain crystalline (SCC) agent that significantly boosts SPF values and enhances water resistance in clinical sunscreen trials.
- 02 A 2.0% concentration clinical HRIPT (Human Repeated Insult Patch Test) confirmed zero dermal irritation or sensitization across a diverse test group.
Transparency
Dusting Analysis
This ingredient is typically used at 0.5% to 4.0% to achieve its functional film-forming and SPF-boosting properties; concentrations below 0.5% may indicate use as a marketing claim rather than for its technical performance.
The Formula
Formulation
Stability
Supplied as an aqueous emulsion, it exhibits high thermal stability and maintains integrity across a wide pH range without requiring alkaline neutralization.
Synergies
- Organic UV filters
- Inorganic UV filters (Zinc Oxide/Titanium Dioxide)
- Pigments in long-wear foundations
Conflicts
- High electrolyte concentrations
- Strong oxidizing agents
- Benzene-polymerized variants
Safety
Safety Profile
Safety is contingent on the polymer being produced in non-benzene solvents. The CIR expert panel considers this category safe in current cosmetic practices when formulated to be non-irritating.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential performance-enhancing polymer for long-wear and sun protection formulas, providing a precise, temperature-triggered delivery system with excellent safety profile.
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References
Sources