Database/Hair Fixing/Polyurethane-19
100% petroleum · ISO 16128

Is Polyurethane-19 natural?

No. Aliphatic-isocyanate polyurethane cross-linked with hydrazine and alkanediamines, all synthesised from petrochemical feedstocks; no natural fragment.

INCI namePolyurethane-19
FunctionHair Fixing
FeedstockBuilt from a petrochemical diisocyanate, synthetic diols and…

How we scored it

Butanediisocyanate + synthetic diols/DMPA copolymer diol, cured with hydrazine and alkanediamines, TEA salt; all petrochemical. 0/total = 0.0.
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

Built from a petrochemical diisocyanate, synthetic diols and diacid, cured with hydrazine and short-chain diamines. No natural-origin route is used commercially.

In plain English

A synthetic polymer used in hair-styling products to hold hair in place with a flexible film. All of its building blocks come from petrochemical sources.

CosIng definition: Butanediisocyanate, polymer with 2,2-dimethyl-1,3-propanediol, 2,2-di(hydroxymethyl)butanol, 2,2-di(hydroxymethyl)propanoic acid, and a copolymer of 2,2-di(hydroxymethyl)butanol and hexanedioic acid, tris(2-hydroxyethyl)amine salts, reaction products with hydrazine and C1-8 alkanediamines

Natural alternatives with the same function

Chitosan 100% natural origin

A film-forming, hair-fixing polysaccharide derived from chitin, the natural material in crustacean shells. Treating chitin with a mild…

 Chitosan Lactate 100% natural origin

A film-forming, hair-fixing polymer made from chitosan, from crustacean shells or fungi, combined with lactic acid, a fermentation-derived…

 Decapeptide-11 100% natural origin

A lab-assembled peptide made from natural amino acids, used to condition hair and help fix style. All of…

 Dehydroxanthan Gum 100% natural origin

A thickener made by removing water from fermentation-derived xanthan gum, used to stabilise formulas and hair-styling products.

 Oleuropein 100% natural origin

A powerful antioxidant compound naturally abundant in olive leaves. It's extracted directly from the leaves, not manufactured.

 Rhizobian Gum 100% natural origin

A polysaccharide gum made by fermenting sugars with Rhizobium bacteria. Used to form films, fix hairstyles, and control…

References

  1. 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.
  2. 2POLYURETHANE-19. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3POLYURETHANE-19. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=POLYURETHANE-19