Science
Mechanism of Action
Upon solvent evaporation, this copolymer forms a durable and protective film on the skin's surface. It functions as a binder and tackifier, improving product cohesion and adherence. As a rheology modifier, it increases system viscosity. The inclusion of isobornyl methacrylate is crucial for developing a harder yet flexible film, enhancing gloss, adhesion, and bolstering resistance against environmental factors like friction, aging, and corrosion.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Prolonged storage above 30 °C (85 °F) can diminish its shelf-life. The nonpolar bicyclic structure of isobornyl methacrylate may necessitate pH adjustment in waterborne systems to facilitate optimal polymerization activity.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel deemed acrylates copolymers (a broader category) safe for cosmetic use when formulated to prevent irritation. While the methacrylate ester monomers (isobornyl and isobutyl methacrylate) have sensitizing potential and are considered safe in nail products only when skin contact is avoided, the polymer itself, with a high molecular weight exceeding 1000 Da, is expected to have limited dermal absorption. Residual monomer concentrations are typically maintained at low levels, ranging from 10 to 1500 ppm. The maximum reported use concentration for Acrylates Copolymer in products with dermal contact, such as face and neck applications, is up to 25%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This copolymer is a valuable film-former and rheology modifier, offering durable film properties and enhanced product texture, though careful formulation is crucial to manage potential monomer sensitization and ensure optimal skin compatibility.
Related
Similar Ingredients
Finding similar ingredients…