What it is
Ammonium acrylates copolymer is a synthetic polymer formed from acrylic acid monomers neutralized with ammonium and used as a rheology modifier in water-based and emulsion systems. It thickens formulas, helps suspend particles, and can form a light film that improves the wear and uniformity of a sunscreen layer. It is a common structural ingredient that contributes to product stability and a defined texture.
Safety & warnings
Acrylate copolymers of this type are generally well tolerated and have a low irritation profile at cosmetic use levels. They are not oils and are not considered comedogenic.
Origin & sourcing
Synthetic. It is manufactured by polymerizing acrylate monomers and neutralizing them with ammonium to produce the copolymer.
Questions everyone asks
What is the role of ammonium acrylates copolymer?
It is a thickening and film-forming polymer that builds viscosity, stabilizes the emulsion, and helps the sunscreen form an even layer.
Is it a UV filter?
No. It is a structural and texture ingredient; it does not absorb or reflect ultraviolet light.