Butyl Acrylate/Styrene Copolymer
AKA “Acrylic Copolymer
Synthetic
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Ingredient Facts
Butyl acrylate/styrene copolymer
AKA: Acrylic Copolymer
Synthetic · Film Forming | Viscosity Controlling | Skin Conditioning - Emollient | Waterproofing · EWG: 1
Plant-Derived
Emollient
Occlusive
Skin Conditioner
Synthetic
Clean
Creates a flexible, breathable layer on skin that helps products stay put and resist smudging throughout the day.
CAS #
25767-47-9
Form
Liquid
Plant-Derived
Synthetic. Derived from petroleum-based monomers: butyl acrylate and styrene from the acrylic and aromatic hydrocarbon families. Synthesized through free-radical polymerization of the two monomers in an emulsion or solution process.
Function
Film Forming | Viscosity Controlling | Skin Conditioning - Emollient | Waterproofing
Benefits
Film Forming
Anti-Inflammatory
Boosts Collagen
Wound Healing
Creates protective layer
Traditional Use
A synthetic polymer developed in the mid-20th century for cosmetic applications as a film-former and adhesive. Used in products like masques and long-wear formulations.
Skin Types
all-skin-types, gentle
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score1
CIR Safety Findings
ewg-1, medical-approval, pregnancy-nursing-safe, all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR