Zinc Stearate
CAS Number: 557-05-1
Zinc Stearate is a white metallic soap powder serving as a primary external lubricant, mold-release agent, and PVC co-stabilizer in plastic and rubber processing. In PVC stabilizer systems, it reacts with the HCl generated during thermal degradation, providing initial color stability. It is also a key lubricant and release agent in rubber vulcanization and thermoplastic compounding.
Technical Specifications
| appearance | White fine powder |
| moisture (%) | ≤1.5 |
| free acid (%) | ≤0.5 |
| zinc content (%) | 10.0–11.0 |
| melting point (°C) | 118–125 |
Applications
- PVC rigid and flexible compound processing
- Rubber mold release agent
- Cosmetics and personal care products
- Polyolefin and styrenic polymer lubrication
- Powder coating flow aid
Key Features
- Excellent external lubrication and mold release
- Effective HCl scavenger in PVC processing
- Good dispersibility in polymer matrices
- Multi-industry utility from plastics to cosmetics
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CAS Number
557-05-1
Category
Plastic / Rubber AdditivesAvailability
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