How we scored it
Where it comes from
Made by alternating copolymerisation of petrochemical isobutylene and maleic anhydride, then neutralised with sodium hydroxide. Degree of substitution assumed 1:1, the industry-standard ratio.
In plain English
A film-forming and thickening polymer used in styling products. Made from petrochemical isobutylene and maleic acid, neutralised with sodium.
CosIng definition: 2-Butenedioic Acid (2Z)-, Disodium salt, Polymer with 2-methyl-1-propene
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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.
- 2ISOBUTYLENE/SODIUM MALEATE COPOLYMER. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3ISOBUTYLENE/SODIUM MALEATE COPOLYMER. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ISOBUTYLENE/SODIUM%20MALEATE%20COPOLYMER