Phenol/Styrene/Methylstyrene Copolymer
Also known as: Phenol-styrene copolymer resin
INCI: Phenol/Styrene/Methylstyrene Copolymer | Function: Film Former | Type: Synthetic copolymer (phenolic resin)
What Is Phenol/Styrene/Methylstyrene Copolymer?
Phenol/Styrene/Methylstyrene Copolymer 是一种酚醛类合成共聚物, 主要用于指甲油 (nail polish) 和护发定型产品中作为成膜剂。提供坚硬、有光泽的薄膜, 增强产品的持久性和抗水性。
Key Skin Benefits
- + Strong film-forming
- + Water resistance
- + Good gloss and hardness
Pros
- + Excellent film-forming for nail products
- + Good gloss and hardness
- + Water-resistant
Cons
- − Contains phenol component — residual monomer concern
- − Not for leave-on skin contact
- − Synthetic polymer — environmental persistence
Specifications
| Property | Value |
|---|
| Usage Areas | Body, Hair |
| Product Type | Leave-On, Rinse-Off |
| Source | Synthetic |
| Natural Level | Synthetic |
Safety Ratings
| Metric | Rating |
|---|
| Skin Sensitivity | 0-1/5 |
| Comedogenic Rating | N/A |
| EWG Score | 3/10 |
Regional Regulatory Limits
| Region | Leave-on % | Rinse-off % | Status |
|---|
| EU (CosIng) | No limit | No limit | Allowed |
| US (CIR/FDA) | No limit | No limit | Allowed |
| Japan (MHLW) | No limit | No limit | Allowed |
| ASEAN | No limit | No limit | Allowed |
| China (NMPA) | No limit | No limit | Allowed |
Typical Usage % by Product Type
| Product Type | Typical % |
|---|
| Nail polish | 5–20% |
| Hair styling spray | 1–5% |
References
- EU CosIng Database. https://ec.europa.eu/growth/tools-databases/cosing/
- EWG Skin Deep. https://www.ewg.org/skindeep/
- SpecialChem — Cosmetic database. https://cosmetics.specialchem.com/