Polyester-11 ●
TL;DR. This ingredient is a synthetic film-former and binder used to improve wear, adhesion, and water resistance in makeup, sunscreen, and other leave-on formulas. It can also add structure and a smoother feel in pigmented systems.
What does Polyester-11 do in a cosmetic formula?
This ingredient is a synthetic film-former and binder used to improve wear, adhesion, and water resistance in makeup, sunscreen, and other leave-on formulas. It can also add structure and a smoother feel in pigmented systems.
Is Polyester-11 clean?
From a clean-beauty perspective, it is usually flagged because it is a synthetic plastic-like polymer rather than because of common irritation concerns. Many stricter retailer and certification frameworks scrutinize this class for persistence and microplastic policy alignment.
Is Polyester-11 sustainable?
This material is generally derived from petrochemical feedstocks and is not considered readily biodegradable. Its main sustainability concern is environmental persistence rather than agricultural sourcing or land-use impact.
Is Polyester-11 COSMOS-approved?
It is not permitted under COSMOS natural or organic standards as a conventional synthetic polymer. Its Green Chemistry fit is weak because it relies on nonrenewable feedstocks and does not readily break down after use.
How does Polyester-11 work chemically?
This material is a high-molecular-weight synthetic polyester resin built from multifunctional acid and alcohol units, which gives it hydrophobicity, adhesion, and film integrity. It is generally stable across typical cosmetic pH and processing conditions, and it is often paired with pigments, waxes, oils, or volatile carriers to tune payoff, flexibility, and wear.
Last updated 2026-05-13