- Appearance: Colorless liquid
- Peroxide Content: Approximately 75% w/w
- Active oxygen content: approx. 6.3% w/w
- Desensitizing Agent: Aliphatic hydrocarbons (boiling point > 170°C)
- Density (20°C): approx. 0.84 g/cm³
- Viscosity (20°C): approx. 3 mPa·s
- Refractive index (20°C): approx. 1.429
- Solubility: Insoluble in water; soluble in alcohols and aliphatic hydrocarbons
- SADT (Critical Temperature): approx. 55°C
- Refrigerated stability: Below -25°C
- Initiation temperature: approx. 75°C
- Recommended storage temperature: Below 20°C
- Shelf life: 3 months from the date of delivery
- Curing agent for unsaturated polyester resins
- Temperature range: 80–150°C
- Dosage: 1–3% as supplied
- "Shelf life" at room temperature (gel time of resin + peroxide) is several days or weeks
- Sensitive to certain fillers, pigments, and additives
- Adding 0.1–0.3% of the inhibitor BC 500 can significantly extend the shelf life
- Within the 70–80°C range (“initial” temperature), the curing rate is slow unless an exothermic reaction occurs (e.g., in an insulated mold). True short-time curing (1–3 minutes) is only achievable at temperatures above 120°C.
- Therefore, the optimal temperature range for hot-press molding is 120–150°C.
- Primarily used for hot-press molding of sheet molding compounds (SMC) or bulk molding compounds (BMC), wet-press molding (e.g., profiles, paper laminates), and impregnation (filament winding).
- Adhere to the recommended storage temperature range to maintain quality and usability; for safety reasons,
- , follow the safety recommendations in local regulations and codes, as well as the requirements of relevant authorities and your insurance provider.