Polymethyl Methacrylate, Methyl Methacrylate Crosspolymer and Methyl Methacrylate/Glycol Dimethacrylate Crosspolymer are polymers, which mean that they are large compounds made up of small repeating units called monomers. Polymethyl Methacrylate contains only one monomer, methyl methacrylate, while the cross polymers also include the cross linking monomer ethylene dimethacrylate. These polymers are used in eye makeup, other makeup, as well as hair and nail care products.
- Polymethyl Methacrylate, Methyl Methacrylate Crosspolymer and Methyl Methacrylate/Glycol Dimethacrylate Crosspolymer function as film formers in cosmetic and personal care products.
- Methyl Methacrylate Crosspolymer may also function as a viscosity increasing agent
Source: www.cosmeticsinfo.org/ingredient/polymethyl-methacrylate-and-related-polymers#sthash.boTlyVxn.dpuf