Butylene/Ethylene/Styrene Copolymer ●
TL;DR. This ingredient is primarily a synthetic film-former and texture modifier. It helps create flexible, water-resistant films and can add body or gel-like structure in anhydrous formulas.
What does Butylene/Ethylene/Styrene Copolymer do in a cosmetic formula?
This ingredient is primarily a synthetic film-former and texture modifier. It helps create flexible, water-resistant films and can add body or gel-like structure in anhydrous formulas.
Is Butylene/Ethylene/Styrene Copolymer clean?
From a clean-beauty perspective, it is usually well tolerated on skin, with low direct irritation concerns. The friction is its status as a synthetic solid polymer, which many clean frameworks flag because of persistence and microplastic concerns.
Is Butylene/Ethylene/Styrene Copolymer sustainable?
This material is typically petroleum-derived and is not readily biodegradable. Its main sustainability issue is environmental persistence rather than high use-level toxicity or resource intensity.
Is Butylene/Ethylene/Styrene Copolymer COSMOS-approved?
This ingredient is not permitted under COSMOS-natural or COSMOS-organic standards because it is a synthetic petrochemical polymer. It has weak Green Chemistry alignment due to nonrenewable feedstocks and poor biodegradability, despite being chemically stable and used efficiently in formulas.
How does Butylene/Ethylene/Styrene Copolymer work chemically?
The molecule is a hydrophobic synthetic copolymer with a saturated hydrocarbon backbone and rigid aromatic units, giving it elastic film-forming and structuring behavior. It is water-insoluble, stable across normal cosmetic pH ranges, and is usually formulated into oil, wax, or anhydrous gel systems rather than water-based phases.
Last updated 2026-05-13