Science
Mechanism of Action
This copolymer's primary function is to create a continuous, flexible film across the skin's surface. This molecular layer improves the spreadability of topical products and substantially extends makeup wear. Beyond enhancing cosmetic performance, the film actively contributes to moisture retention, increases a product's water resistance, and helps to secure active ingredients on the skin for prolonged action. Additionally, it functions as a thickening and stabilizing agent for emulsions, and can impart a matte, soft, velvety texture by absorbing excess oil, characteristic of similar crosspolymers.
Research
Clinical Evidence
Medium confidence0.5% - 5.0% (observed in related Acrylates Copolymers for enhancing water resistance and SPF retention in sunscreens and moisturizers)
Key findings
- 01 Clinical studies on related Acrylates Copolymers, including testing up to 30% solids and in a 25% aqueous dilution (Human Repeated Insult Patch Test with 47 subjects), demonstrated no irritant or sensitizing effects.
- 02 A related Acrylates/Ethylhexyl Acrylate Crosspolymer showed no irritation or sensitization when tested undiluted in human studies.
- 03 Related film-forming Acrylates Copolymers are suggested for use between 0.5% and 5.0% to provide water resistance and SPF retention in sun protection and SPF-containing moisturizers.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The base acrylates copolymer is inherently water-insoluble, but the 'TEA-' prefix in the ingredient name indicates it has been neutralized with triethanolamine (TEA), rendering it water-soluble or dispersible. It is also soluble in ethanol, isopropanol, and fatty alcohols. For optimal dispersion and performance in aqueous formulations, 80-100% neutralization of its carboxyl groups is advised, typically achieved by adding the neutralizing agent to the water phase and heating to approximately 80°C.
Synergies
- Film-forming agents (for enhanced durability)
- Emollients (for improved skin feel)
- UV filters (to boost water resistance and SPF retention)
- Active ingredients (to promote skin retention and prolonged efficacy)
Conflicts
- Cationic raw materials (compatibility must be thoroughly evaluated due to its anionic nature)
- High concentrations of non-polar products (e.g., paraffin waxes, which may diminish solubility)
- Nitrosating agents (due to the potential for nitrosamine formation if secondary amino compounds are present as impurities from TEA)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that related acrylates copolymers are safe for use in cosmetics when formulated to avoid irritation. Specific safety considerations involve managing residual monomer concentrations: acrylic acid should typically be between 10-1000 ppm (with an upper limit of 1500 ppm), and other residual monomers like ethyl acrylate should be ≤ 20 ppm. The EU's Scientific Committee on Consumer Safety (SCCS) has also assessed TEA-ACRYLATES/ETHYLHEXYL ACRYLATE COPOLYMER, deeming its use safe under specific restrictions, likely pertaining to purity criteria, maximum concentration, or particular product categories. A notable concern with TEA derivatives is the potential for nitrosamine formation if secondary amino compounds are present as impurities and react with nitrosating agents within a formulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
TEA-ACRYLATES/ETHYLHEXYL ACRYLATE COPOLYMER is a valuable film-forming agent that enhances product durability, water resistance, and moisture retention, while exhibiting a low risk of irritation and comedogenicity suitable for all skin types when formulated appropriately.
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