What it is
This is a synthetic copolymer of acrylates with a steareth-20 methacrylate component that gives it surfactant-like, hydrophobically modified character. It functions as an associative thickener, building viscosity and stabilizing emulsions while contributing to spreadability and a pleasant feel. It is commonly used in fluid sunscreen formulations to control texture.
Safety & warnings
As a large polymer that is not appreciably absorbed, it is generally well tolerated and not associated with significant irritation, allergen, or comedogenicity concerns.
Origin & sourcing
Synthetic; produced by copolymerization of acrylate monomers with a steareth-20 methacrylate monomer.
Questions everyone asks
What is this ingredient used for?
It thickens and stabilizes the formula and helps a sunscreen spread smoothly and stay uniform.
Is it a UV filter?
No; it is a rheology and texture modifier, not a sunscreen active.