Methyl Methacrylate
What is Methyl Methacrylate?
Methyl Methacrylate is a synthetic monomer primarily used in the production of polymethyl methacrylate (PMMA), a polymer known as acrylic or Plexiglas, which can appear in skincare as film-forming agents or microbeads in certain products. In cosmetics, it functions to create durable, flexible films on nails or skin for enhanced wear and protection. However, it is highly reactive and typically not used in its pure monomer form in finished skincare products due to polymerization risks.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Bulking Agent
Increases mass/volume to build structure and improve handling, commonly used to adjust feel, spread, and cost-in-use without acting as a primary active.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.
Artificial nail builder
Forms the structural body of artificial nails by creating a durable, shapeable layer (often via polymers/monomers), providing thickness, strength, and wear resistance.