Film Former
BIS-HEMA POLY(BUTYLENE/HEXAMETHYLENE CARBONATE)/IPDI COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A polycarbonate-polyurethane copolymer end-capped with HEMA — used in nail and color cosmetics for tough, flexible coatings. Cured polymer is inert, but free HEMA is a known nail-acrylate sensitizer, so monomer purity is critical.
Function
Skin benefits
- Forms durable, flexible films on nails
- Polycarbonate backbone gives strength and biocompatibility
- Improves wear and chip resistance
Known concerns
- Residual IPDI isocyanate concern if poorly purified
- HEMA monomer is a documented nail acrylate-allergy trigger
- Limited public toxicology on this exact copolymer
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related film formers
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.