What Is Hydrogenated Polybutadiene/Glycol/Hdi Copolymer?
Hydrogenated Polybutadiene/Glycol/HDI Copolymer is a man-made polymer created by linking three key building blocks: hydroxyl-terminated hydrogenated polybutadiene, 1,6-hexamethylene diisocyanate (HDI) and a small glycol component. The backbone comes from polybutadiene, a rubber-like material sourced from petroleum. After hydrogenation, most of the natural double bonds are saturated, making the polymer more stable and less prone to oxidation. Chemists cap the polymer chains with hydroxyl groups, then react them with HDI and glycol under heat and controlled moisture levels. This step forms strong urethane links, resulting in a flexible yet durable copolymer that dissolves or disperses easily in cosmetic bases.
The technology behind this ingredient was first explored in the coatings and adhesive fields, where long-lasting, water-resistant films are essential. Formulators soon realized that the same properties translate well to beauty products that need staying power. Today the copolymer appears in long-wear makeup such as mascaras, eyeliners, liquid lipsticks and transfer-resistant foundations. It is also used in sunscreens, hair gels, styling sprays, nail lacquers, facial masks and lightweight anti-aging serums that aim to leave a protective veil on the skin.
Hydrogenated Polybutadiene/Glycol/Hdi Copolymer’s Cosmetic Benefits/Uses
This ingredient serves one key purpose in cosmetics: it acts as a film former. When spread on skin, hair or nails it dries to a thin, invisible layer that clings well to the surface. The film helps lock in moisture, improve water and smudge resistance, keep pigments in place and boost overall wear time. It can also lend a smoother feel, reduce tackiness in formulations and provide a subtle barrier against daily environmental stress.
Who Can Use Hydrogenated Polybutadiene/Glycol/Hdi Copolymer
This film-forming polymer is considered gentle enough for most skin types, including dry, normal, combination and oily skin. Because it sits on the surface rather than penetrating deeply it rarely disrupts sensitive or compromised skin, though anyone with a known sensitivity to polyurethane materials should proceed cautiously.
The raw materials used to make the copolymer are synthetic and sourced from petroleum, not animals, so it is suitable for vegans and vegetarians.
No data indicate that the ingredient poses a specific risk to women who are pregnant or breastfeeding when used in topical cosmetic concentrations. Still, this is not medical advice and anyone who is pregnant or nursing should show the full ingredient list of any cosmetic product to a qualified healthcare provider before use, just to be safe.
The copolymer is not known to increase photosensitivity and can be worn during daytime without heightening the risk of sunburn. As with any film former, thorough cleansing at the end of the day helps avoid buildup.
Potential Side Effects/Adverse Reactions
Reactions to topical Hydrogenated Polybutadiene/Glycol/Hdi Copolymer vary from person to person. The points below list potential side effects, though most users experience none of these when the ingredient is formulated and used correctly.
- Mild skin irritation such as redness or itching
- Contact dermatitis in individuals allergic to polyurethane compounds
- Eye irritation if the product accidentally enters the eyes
- Product buildup leading to clogged pores if not removed properly before reapplication
If you experience any of these effects discontinue use and consult a healthcare professional.
Comedogenic Rating
Rating: 1/5
The copolymer molecules are large and sit mostly on the surface forming a breathable film rather than sinking into pores. They do not contain heavy oils or waxes that typically trigger breakouts, so the likelihood of pore clogging is very low. A rating of 1 reflects the slim chance of issues while acknowledging that any film former can trap debris if makeup is not removed thoroughly. Overall this ingredient is generally suitable for acne-prone or breakout-prone skin.
If a formula combines the copolymer with richer emollients or silicones the finished product’s comedogenic potential will depend on those other ingredients, not the copolymer itself.
Summary
Hydrogenated Polybutadiene/Glycol/HDI Copolymer is mainly valued for its film-forming ability. Once applied it dries into a flexible layer that locks in moisture, anchors pigments and boosts the water and smudge resistance of makeup, sunscreens, hair products and nail lacquers. This performance comes from its urethane links and hydrogenated polybutadiene backbone which create a stable, durable network on the surface.
While not as famous as silicone elastomers or acrylate polymers it has carved out a niche in long-wear and transfer-resistant formulas where staying power matters. Its synthetic origin means consistent quality and no animal-derived components, making it a reliable choice for vegan formulations.
Safety data show the ingredient is low-irritant for most users and it holds a near-noncomedogenic score. As with any new cosmetic, patch testing is a smart precaution to confirm personal compatibility before full-face or daily use.