Science
Mechanism of Action
It functions as a structural diamine and cross-linking agent, utilizing its unique norbornane bicyclic framework to impart mechanical strength and thermal stability to polymers. On the skin, it facilitates the formation of a cohesive, non-tacky barrier that repels water and sweat while maintaining a high degree of transparency and flexibility.
Research
Clinical Evidence
Medium confidence5%
Key findings
- 01 Research indicates its role in synthesizing polyamide-polyether copolymers (such as Pebax), which significantly enhance the longevity of topical applications and provide smudge-resistant mechanical properties.
Transparency
Dusting Analysis
As a functional monomer required for structural film integrity, concentrations below 0.05% typically fail to provide the intended mechanical durability or water-resistance benefits.
The Formula
Formulation
Stability
The polymerized form is stable across a wide pH range (3–11). However, the free monomer is highly basic and reactive to atmospheric CO2; it requires precise pH control to prevent salt precipitation in acidic environments.
Synergies
- Polyamide-polyether copolymers
- Hydrophobic pigments
- Silicone resins
Conflicts
- Strong oxidizing agents
- Formaldehyde
- Strong acids
Safety
Safety Profile
While the raw industrial substance is classified as corrosive, it is safe in cosmetics when fully polymerized or when residual levels are strictly limited to non-irritating thresholds.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential structural component for achieving high-performance, water-resistant films in long-wear and protective skincare.
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