What Is Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer?
Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer is a man-made polymer created by linking small units of 1,4-butanediol with isophorone diisocyanate, then finishing the chain with 2-hydroxyethyl acrylate. The result is a flexible, lightweight film-forming material that remains stable when exposed to air, light and a range of pH levels. Because all of its building blocks are produced in controlled laboratory settings, the ingredient does not rely on animal or plant extraction and shows consistent quality from batch to batch.
Polyurethane-style polymers like this one began appearing in cosmetics in the late 1990s as formulators looked for alternatives to heavier waxes and synthetic resins. Advances in polymer chemistry allowed companies to fine-tune properties such as stretch, gloss and water resistance, making them useful in everything from hair gels to skincare. Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer entered the market as brands demanded a binder that could deliver a smooth finish without a tacky feel.
Manufacturing involves a stepwise reaction under carefully controlled temperatures where 1,4-butanediol oligomers are first reacted with isophorone diisocyanate. Once the desired molecular weight is reached, 2-hydroxyethyl acrylate is added to cap the ends, giving the polymer compatibility with both water-based and solvent-based systems. After purification and drying, the material is supplied as a viscous liquid or fine powder ready to be blended into cosmetic bases.
You will most often find Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer in long-wear foundations, liquid lipsticks, waterproof mascaras, peel-off face masks, smoothing primers and certain leave-on hair treatments where durability and a weightless feel are key selling points.
Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer’s Cosmetic Benefits/Uses
This ingredient is primarily valued for its binding ability, meaning it helps hold a formula together while forming a flexible film on skin or hair. As a binder it improves product texture, keeps pigments evenly dispersed, boosts wear time and enhances water resistance without adding noticeable weight or stiffness.
Who Can Use Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer
This polymer suits most skin types including oily, combination, normal and dry because it sits on the surface and does not clog pores or pull moisture out of the skin. Sensitive skin users generally tolerate it well since it has no fragrance or reactive actives, though those with a known polyurethane allergy should avoid it.
All building blocks are synthesized in a lab and contain no animal-derived substances so the ingredient is appropriate for vegans and vegetarians.
Current data show no specific risks for pregnant or breastfeeding women when the polymer is used in cosmetics, but this is not medical advice. Anyone expecting or nursing should review their routine with a qualified healthcare professional to be sure every product is suitable for their individual situation.
The ingredient does not increase photosensitivity and can be worn in day or night formulas without affecting your sun protection needs. It is also odorless and colorless so it rarely interferes with fragrance or pigment choices in a finished product.
Potential Side Effects/Adverse Reactions
Responses to topical Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer differ from person to person. The issues listed below are possible but unlikely for most users when the ingredient is used at typical cosmetic levels.
- Mild skin redness or itching
- Transient stinging on very sensitive or compromised skin
- Contact dermatitis in individuals allergic to polyurethane materials
- Watery eyes if used in eye products and accidentally rubbed into the eye
If you notice any irritation discontinue use promptly and consult a healthcare professional for guidance.
Comedogenic Rating
Rating: 1 (very low)
Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer has a large molecular size and forms a breathable film that stays on the surface rather than seeping into pores. It does not contain heavy oils or waxes that typically trap dead skin cells and sebum. Because of this, reports of clogged pores are rare and most formulators consider it essentially non pore clogging.
In practical terms this ingredient is generally suitable for people prone to acne or breakouts.
Its low usage levels in finished products and inert nature further reduce any risk of comedogenicity.
Summary
Bis-Hea Poly(1,4-Butanediol)-22/Ipdi Copolymer is mainly used as a binder and lightweight film former, helping pigments stay evenly dispersed and boosting wear time while keeping textures smooth and flexible. By capping the polymer with 2-hydroxyethyl acrylate it can sit comfortably in both water-based and solvent-based formulas, creating a durable yet barely there veil on skin or hair.
Though not as famous as silicones or traditional polyurethanes, it appears with growing frequency in long-wear makeup, peel-off masks and waterproof eye products thanks to its balance of strength and comfort.
Current data show it to be low risk for irritation or pore blockage when used at cosmetic concentrations. Still, skin can be unpredictable so it is sensible to patch test any new product that contains this polymer before applying it more widely.