What it is
This crosspolymer combines acryloyldimethyltaurate units with vinylpyrrolidone (VP) in a crosslinked network, so it swells in water to build a clear, soft gel. In a sunscreen it thickens the formula, stabilizes the emulsion, and helps suspend other ingredients while contributing a light, non-tacky skin feel. The VP portion adds film-forming character that can help the product spread and set evenly.
Safety & warnings
This class of crosslinked acrylate/VP polymers stays on the skin surface and is generally well tolerated, with low irritation and sensitization potential at normal use levels. It is not regarded as comedogenic and contains no known fragrance allergens.
Origin & sourcing
Synthetic, produced by crosslinking polymerization of acryloyldimethyltaurate and vinylpyrrolidone monomers.
Questions everyone asks
What is the role of this ingredient?
It is a gelling thickener and stabilizer that gives the sunscreen its consistency and keeps the emulsion uniform.
Will it leave a sticky feel?
Polymers of this type are usually chosen for a light, non-tacky finish, though overall feel depends on the full formula.