How we scored it
Where it comes from
Polyurethane-55 is built from petrochemical polytetramethylene glycol segments, a diisocyanate, and an acrylate end-cap. No component has a commercial natural-origin source.
In plain English
A film-forming polymer used to strengthen and add gloss to nail products. It is made entirely from synthetic, petroleum-derived materials.
CosIng definition: Polyurethane-55 is the polymer formed by the reaction of Poly(1,4-Butanediol)-28, Poly(1,4-Butanediol)-14, and 1,3-bis(isocyanatomethy)cyclohexane. The polymer is capped with 4-hydroxybutyl acrylate.
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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.
- 2POLYURETHANE-55. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3POLYURETHANE-55. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=POLYURETHANE-55