Polyurethane-21
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About Polyurethane-21
Polyurethane-21 is a urethane copolymer obtained by reacting isophorone diisocyanate with the polyester of hexanedioic acid, isophthalic acid, and 1,6-hexanediol, dimethylolpropionic acid, and ethylenediamine, followed by neutralization with triethylamine.[1] In cosmetics, it is used to form a thin film on the surface of the skin, hair, and nails after application.[3] In Europe, the maximum concentration is 2.5% in leave-on products, while no separate maximum concentration is specified for rinse-off products. Nitrosamines must also be no more than 50 μg/kg.[2]
Polyurethane-21 Details
- Ingredient function
- Film Forming
- INCI name
- POLYURETHANE-21
- CosIng ID
- 58925
Polyurethane-21 References
- 대한화장품협회 화장품성분사전 · 성분코드 16177
- European Union · Annex III entry 62
- European Commission — CosIng · substanceId 58925
Last updated
This ingredient information is based on publicly available scientific literature, cosmetic ingredient databases, and regulatory sources from various countries. Usage restrictions, permitted concentrations, and labeling requirements may vary by country, region, and product type.
Ingredient preference is a reference metric based on user review data. It does not indicate the efficacy or safety of the ingredient itself.
