Thickener
BIS-PMMA/POLYBUTYL ACRYLATE COPOLYMER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A high-MW block copolymer of PMMA and polybutyl acrylate used to control viscosity. The cured polymer is well tolerated; safety attention focuses on keeping residual MMA and butyl acrylate monomer levels low.
Function
Skin benefits
- Effective viscosity control in cosmetics
- Provides flexible, durable films
- High molecular weight reduces skin penetration
- Compatible with both solvent and aqueous systems
Known concerns
- Residual methyl methacrylate is a known sensitizer
- Residual butyl acrylate is a known sensitizer
- Microplastic environmental persistence
- EU residual-monomer compliance required
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related thickeners
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.