How we scored it
Assume 10 wt% ceteareth-20 methacrylate (1205.6 Da; natural C16/18 alkoxy C17H35O 255.5 = 21%); acrylic comonomers, ethylene oxide and crosslinker petrochemical. 0.10 x 0.21 = 0.02.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.
Where it comes from
Emulsion copolymerisation of acrylic and methacrylic monomers with a ceteareth-20 methacrylate associative macromonomer and a dimethacrylate crosslinker. The macromonomer content (about 10 wt%) is assumed.
In plain English
A synthetic acrylic polymer with fatty side chains that thickens water-based products and stabilises emulsions once the pH is raised. It gives creams and gels a smooth, rich texture.
CosIng definition: Acrylates/Ceteareth-20 Methacrylate Crosspolymer is a copolymer of the ester of methacrylic acid and Ceteareth-25 and one or more monomers of acrylic acid, methacrylic acid, or one of their simple esters, crosslinked with ethylene glycol dimethacrylate.
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2ACRYLATES/CETEARETH-20 METHACRYLATE CROSSPOLYMER. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3ACRYLATES/CETEARETH-20 METHACRYLATE CROSSPOLYMER. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ACRYLATES/CETEARETH-20%20METHACRYLATE%20CROSSPOLYMER