Stearic Acid is a saturated long-chain fatty acid derived from natural sources. It is used widely as a lubricant, dispersant, release agent, and stabilizer in the production of plastics, rubber, cosmetics, and more. Its consistent quality and neutral properties make it a reliable additive in both industrial and personal care applications.
| Property | Typical Value |
|---|---|
| Appearance | White powder or flakes |
| Acid Value | ≥ 200 mg KOH/g |
| Melting Point | 67 – 70 °C |
| Iodine Value | ≤ 1.0 |
| Moisture | ≤ 0.2% |
| Purity (C18) | ≥ 95% |
| Problem | Stearic Acid Role |
|---|---|
| High extrusion torque | Acts as internal lubricant to reduce friction |
| Poor mold release | Provides clean separation from mold surfaces |
| Inconsistent pigment dispersion | Improves wetting and distribution |
| Unstable pH in cosmetics | Acts as thickener and stabilizer |
Q1: Is stearic acid suitable for food contact or cosmetic use?
Yes, food/cosmetic grades are available upon request.
Q2: Can it be used with other lubricants?
Yes, stearic acid blends well with metal stearates and waxes.
Q3: How is it added in PVC production?
Typically added at 0.3 – 1.5 phr depending on processing line.
