Polyester-5 ●
TL;DR. This ingredient functions mainly as a synthetic film-former, helping products create a flexible, continuous coating on hair or skin. It can support hold, water resistance, texture, and pigment or UV-filter adhesion.
What does Polyester-5 do in a cosmetic formula?
This ingredient functions mainly as a synthetic film-former, helping products create a flexible, continuous coating on hair or skin. It can support hold, water resistance, texture, and pigment or UV-filter adhesion.
Is Polyester-5 clean?
From a clean-beauty perspective, it is usually viewed with friction because it is a synthetic polymer and may fall under policies that restrict persistent film-forming plastics. Skin irritation is not the main concern, the bigger issue is standards alignment and environmental persistence.
Is Polyester-5 sustainable?
This material is typically petrochemical-derived and is not considered readily biodegradable. Its environmental profile is weaker than that of simple biodegradable plant-derived or mineral ingredients because polymer films can persist after rinse-off use.
Is Polyester-5 COSMOS-approved?
It is not aligned with COSMOS natural or organic standards because it is a synthetic polyester film-former rather than a permitted natural-origin material. Its fit with Green Chemistry is limited by nonrenewable feedstocks, persistence, and end-of-life concerns, even though it can improve product performance at low use levels.
How does Polyester-5 work chemically?
This compound is a high-molecular-weight synthetic polyester built from repeating ester-linked units, with architecture chosen to form clear, flexible films after water or solvent evaporation. It is commonly used at low single-digit percentages, often around 0.5% to 5%, and is selected for film integrity, water resistance, and compatibility with other styling or sunscreen-film systems.
Last updated 2026-05-13