What it is
Acrylates/Stearyl Acrylate/Dimethicone Methacrylate Copolymer is a synthetic copolymer combining acrylate and stearyl acrylate units with dimethicone (silicone) methacrylate. The silicone portion gives it a smooth, conditioning feel while the acrylate backbone forms a cohesive film on the skin. It is used in sunscreens and tone-up products to improve spreadability, even deposition, and the longevity of the finish.
Safety & warnings
As a large film-forming polymer it remains on the skin surface and is generally well tolerated, with low expected potential for irritation or sensitization.
Origin & sourcing
Synthetic, made by copolymerizing acrylate and stearyl acrylate monomers with a silicone-functional methacrylate.
Questions everyone asks
Why is silicone built into this copolymer?
The dimethicone portion provides a smooth, light skin feel while the acrylate backbone forms an even film, improving the texture and finish of the product.
What kind of products use it?
It is found in sunscreens and tone-up creams where an even, long-lasting finish is desired.