Science
Mechanism of Action
This carboxy-functionalized silicone operates through a dual-action structure. Its silicone backbone provides characteristic smoothness and water-repellency, while its carboxylic acid groups, once neutralized, create an ionic matrix that adheres securely to the skin. This results in a viscoelastic, non-tacky film that acts as a secondary skin barrier against environmental irritants and transepidermal water loss.
Research
Clinical Evidence
High confidence5%
Key findings
- 01 Demonstrated significant stabilization of pigment dispersion and color uniformity at concentrations between 1% and 5%.
- 02 Observed enhancements in film durability and wash-off resistance when cross-linked at 3% to 30% concentrations.
- 03 Validated as a safe skin protectant that maintains a breathable barrier to prevent moisture evaporation (TEWL).
Transparency
Dusting Analysis
While often used in color cosmetics at low levels for pigment wetting, therapeutic barrier benefits and film-forming efficacy require a minimum of 1% concentration to be meaningful in skincare.
The Formula
Formulation
Stability
The ingredient requires neutralization (typically with an alkaline agent) to reach a pH of 7.0–9.0 to activate its ionic film-forming properties; in its unneutralized state, it behaves as an oil-miscible liquid.
Synergies
- Polycarbodiimides (for enhanced film durability)
- Mineral pigments (for stabilized dispersion)
- Sunscreen filters
Conflicts
- Low pH environments (causes precipitation)
- Strongly cationic ingredients (leads to complexation instability)
Safety
Safety Profile
Generally recognized as safe in leave-on products up to 15% when formulated to avoid irritation; its large molecular structure prevents deep systemic absorption.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An exceptional multi-functional polymer for precision formulations requiring both moisture retention and superior wear-time.
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References
Sources