Researched by Helena DeMaria-Williams
Formula IngredientFilm FormingStyrene/Isoprene Copolymer
INCI: Styrene/Isoprene Copolymer
Styrene/Isoprene Copolymer is a synthetic polymer formed from styrene and isoprene (2-methyl-1,3-butadiene) monomers. It functions primarily as a film-forming and opacifying agent in cosmetic formulations. It is commonly used in hydrocolloid acne patches and adhesive skincare products, where it provides a flexible, adherent film that conforms to the skin surface.
Category
Film Forming
Irritation Risk
Low
Skin Types
all skin types
What does this do in a formula?
film forming, adhesion, flexibility, opacifying, product structure
Is Styrene/Isoprene Copolymer safe? Key considerations
Can Styrene/Isoprene Copolymer cause irritation?
Low RiskStyrene/isoprene copolymer is an inert polymer that is generally well tolerated. No EU CosIng Annex II or III restrictions apply. As a synthetic rubber-type polymer, it has minimal sensitisation potential.
Does Styrene/Isoprene Copolymer increase sun sensitivity?
No RiskThis copolymer does not increase photosensitivity. No sun protection precautions are required.
Is Styrene/Isoprene Copolymer safe during pregnancy?
SafeA synthetic polymer with no known reproductive or developmental toxicity. Considered safe for topical use during pregnancy.
How does Styrene/Isoprene Copolymer work?
Styrene/Isoprene Copolymer is a synthetic polymer formed from styrene and isoprene (2-methyl-1,3-butadiene) monomers. It functions primarily as a film-forming and opacifying agent in cosmetic formulations. It is commonly used in hydrocolloid acne patches and adhesive skincare products, where it provides a flexible, adherent film that conforms to the skin surface.
Which products contain Styrene/Isoprene Copolymer?
Shop products that contain Styrene/Isoprene Copolymer
