Question 1

What does Castor Oil/IPDI Copolymer do in a cosmetic formula?

Accepted Answer

This ingredient is primarily a film-forming polymer, used to create flexible, glossy, water-resistant films in color cosmetics, lash products, and long-wear formats. It can also help improve adhesion, wear time, and transfer resistance.

Question 2

Is Castor Oil/IPDI Copolymer clean?

Accepted Answer

From a clean-beauty perspective, this ingredient has friction because it is a synthetic polyurethane-type film former rather than a simple biodegradable cosmetic material. The main quality-control focus is low residual reactive monomer content and overall impurity control from polymer manufacture.

Question 3

Is Castor Oil/IPDI Copolymer sustainable?

Accepted Answer

This material uses a partly renewable triglyceride feedstock, but it is also built with a petrochemical diisocyanate component. The finished polymer is not expected to be readily biodegradable, so its environmental profile is less aligned with low-persistence ingredient design.

Question 4

Is Castor Oil/IPDI Copolymer COSMOS-approved?

Accepted Answer

This ingredient is not generally aligned with COSMOS-natural or COSMOS-organic standards because it is a synthetic polymer made through diisocyanate chemistry. From a Green Chemistry lens, its renewable-content contribution is a positive, but persistence and reactive-monomer manufacturing concerns keep alignment limited.

Question 5

How does Castor Oil/IPDI Copolymer work chemically?

Accepted Answer

The molecule is a crosslinked or high-molecular-weight polyurethane-type polymer formed by reacting hydroxyl-bearing triglyceride chains with diisocyanate functionality, producing urethane linkages and a flexible hydrophobic network. It is typically used as a film former in anhydrous or low-water systems, where compatibility with oils, waxes, pigments, and volatile carriers determines film feel and wear.