Polyester-37 ●
TL;DR. It functions mainly as a synthetic film-former and texture modifier, helping products form flexible, water-resistant films on skin, hair, or lashes. It can also help structure oils, improve wear, and support pigment or UV-filter dispersion.
What does Polyester-37 do in a cosmetic formula?
It functions mainly as a synthetic film-former and texture modifier, helping products form flexible, water-resistant films on skin, hair, or lashes. It can also help structure oils, improve wear, and support pigment or UV-filter dispersion.
Is Polyester-37 clean?
Clean-beauty frameworks often flag it as a synthetic polymer rather than for routine skin irritation, since large molecules typically have low skin penetration. The main scrutiny is restricted-list friction around persistent synthetic polymers and supplier controls for residual monomers or catalysts.
Is Polyester-37 sustainable?
This material is typically made from petrochemical-derived monomers through polymerization chemistry. It is not considered readily biodegradable, so its sustainability profile is weaker than renewable, degradable film-formers.
Is Polyester-37 COSMOS-approved?
It is not permitted in COSMOS-natural or COSMOS-organic products as a conventional synthetic polymer. From a Green Chemistry view, it has clear drawbacks around nonrenewable feedstocks and end-of-life persistence, even if it can deliver performance at relatively low use levels.
How does Polyester-37 work chemically?
The molecule is a high-molecular-weight condensation polymer with repeating ester linkages, designed to create cohesive films and oil-phase structure rather than dissolve in water. Typical use levels are supplier-specific, and performance depends on solvent or oil compatibility, plasticizers, and the loading of pigments, waxes, or UV filters.
Last updated 2026-05-13