Back to Ingredient Dictionary

ISOPRENE/MA/METHOXY PEG-40 COPOLYMER

Description

ISOPRENE/MA/METHOXY PEG-40 COPOLYMER is a synthetic copolymer used in various skincare and cosmetic formulations. This multifunctional ingredient serves primarily as a film-forming agent and viscosity controller. Its unique chemical structure, combining isoprene, maleic anhydride (MA), and methoxy polyethylene glycol (PEG-40), allows it to form a flexible, breathable film on the skin's surface.

This copolymer enhances the spreadability and texture of products while providing a smooth, non-tacky feel. It helps to improve the adherence of active ingredients to the skin, potentially increasing their efficacy. The film-forming properties also contribute to water resistance in sunscreens and long-wearing makeup formulations.

As a viscosity controller, it helps stabilize emulsions and suspensions, ensuring consistent product texture and performance. The PEG-40 component imparts water-solubility, making it compatible with a wide range of formulations. This ingredient is generally well-tolerated by most skin types and is considered safe for use in cosmetics at typical concentrations.

In skincare products, ISOPRENE/MA/METHOXY PEG-40 COPOLYMER can be found in moisturizers, serums, sunscreens, and foundations, where it contributes to improved texture, stability, and overall product performance.