Trimethypentanediol/Adipic Acid Copolymer ●
TL;DR. This ingredient is primarily a film-forming polymer, used to improve adhesion, flexibility, and wear in color cosmetics, nail products, and long-wear formulas.
What does Trimethypentanediol/Adipic Acid Copolymer do in a cosmetic formula?
This ingredient is primarily a film-forming polymer, used to improve adhesion, flexibility, and wear in color cosmetics, nail products, and long-wear formulas.
Is Trimethypentanediol/Adipic Acid Copolymer clean?
From a clean-beauty perspective, this ingredient is usually treated as a synthetic polymer rather than a simple skin-active ingredient. It is not a common irritation concern, but it can face restricted-list friction because of its synthetic polymer profile and limited biodegradability data.
Is Trimethypentanediol/Adipic Acid Copolymer sustainable?
This material is typically petrochemical-derived and is not known as a readily biodegradable ingredient. Its sustainability profile is limited by fossil feedstock dependence and environmental persistence concerns common to durable cosmetic polymers.
Is Trimethypentanediol/Adipic Acid Copolymer COSMOS-approved?
This ingredient is generally not permitted under COSMOS natural or organic standards because it is a synthetic polymer outside the allowed natural-origin ingredient framework. It has weak Green Chemistry alignment due to nonrenewable sourcing, polymer persistence concerns, and limited end-of-life biodegradation support.
How does Trimethypentanediol/Adipic Acid Copolymer work chemically?
The molecule is a synthetic aliphatic polyester made by condensation chemistry, designed to create a flexible, hydrophobic film on skin, hair, or nails. It is generally stable across normal cosmetic pH ranges and is co-formulated with solvents, resins, waxes, or pigments to tune film hardness, gloss, and adhesion.
Last updated 2026-08-31