What it is
This crosspolymer is built from acrylic acid and vinylpyrrolidone (VP) units that are crosslinked into a three-dimensional network. The acrylic acid portion provides viscosity building and gel structure when neutralized, while the VP component contributes film-forming character and helps create a smooth, cohesive layer on the skin. In sunscreens it can help thicken the base, stabilize the emulsion, and support an even cosmetic finish.
Safety & warnings
As a high-molecular-weight crosslinked polymer, it is generally well tolerated on intact skin and is not expected to penetrate significantly, with a low irritation and sensitization profile. It is not a recognized fragrance allergen and is not a comedogenic oil.
Origin & sourcing
Synthetic polymer made by crosslinking acrylic acid with vinylpyrrolidone monomers.
Questions everyone asks
What is the VP part of this ingredient?
VP stands for vinylpyrrolidone, a monomer that adds film-forming character to the polymer network alongside the acrylic acid units.
Why is it used in sunscreen?
It helps thicken and stabilize the formula and contributes to a smooth, even film when the product is applied.