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Film Former

ISOBUTYLENE/ETHYLMALEIMIDE/HYDROXYETHYLMALEIMIDE COPOLYMER

CAS 283148-39-0
70

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A maleimide-isobutylene copolymer used in hair styling for humidity-resistant fixative films. Cured polymer is well-tolerated; residual maleimide monomer is the main purity-dependent sensitisation concern.

Function

FILM FORMINGHAIR FIXING

Skin benefits

  • Forms flexible hair-fixing films
  • Long-hold styling
  • Humidity resistance
  • Soft, non-flaking film

Known concerns

  • Maleimide monomers can be sensitisers
  • Limited published safety data
  • Not biodegradable
  • Possible irritation in eye-area products

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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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.