- ACH-80-AL3 is a colorless, free-flowing liquid containing approximately 80% w/w of 1,1-tert-butylperoxycyclohexane, which has been demineralized using alkane hydrocarbons.This cycloaliphatic peroxide is used as a curing initiator (radical source) for unsaturated polyester resins.
- Main Applications: Hot-press molding of SMC or BMC at temperatures ranging from 130 to 150°C (266 to 302°F).
- Appearance: Colorless liquid
- Deactivator: Alkane hydrocarbons
- Content: approx. 80% w/w
- Active Oxygen (AO) Content: Approx. 8.8% w/w
- Density (20°C): Approx. 0.90 g/cm³
- Viscosity (20°C): Approximately 6.7 mPa·s
- Refractive index (20°C): approx. 1.441
- Critical Temperature (SADT): approx. 60°C / 140°F
- Refrigerated stability: approx. -20°C / -4°F
- Initiation temperature: approx. 80°C / 176°F
- Recommended storage temperature: Below 30°C / 86°F
- Shelf life after delivery: 6 months
- Standard Packaging: HDPE drums, 35 lbs and 25 kg
- Curing agent for unsaturated polyester resins, with a temperature range of 120–160°C (248–320°F).
- Usage ratio: 0.5–2.5%.
- "Shelf life" (gel time of resin + peroxide) at room temperature varies from several weeks to several months depending on the resin type and is virtually unaffected by fillers, pigments, cobalt salts, or tertiary aromatic amines.
- Adding 0.1–0.3% of the inhibitor BC 500 can significantly extend the shelf life.
- Within the range of 75–90°C (167–194°F) (“initiation” temperature), the curing rate will not be very high if the reaction heat does not cause a temperature rise (e.g., inside a heated mold).
- True short-time curing within 1–3 minutes is only achievable at temperatures above 115°C (239°F).
- The optimal temperature range for hot-press molding is 125–150°C (257–302°F).
- ACH-80-AL3 provides improved surface properties for SMC parts.
- Primarily used for hot-press molding of sheet molding compounds (SMC) or bulk molding compounds (BMC).
- ACH-80-AL3 reacts slightly faster than CH-80-AL in standard n-butylphenol polyester molding resins.
- Decomposition products that may be detected: tert-butyl alcohol, acetone, cyclohexanone, lactone, hexanoic acid
- Avoid heat, light, and moisture, and protect the product from contamination by impurities.
- Keep within safe temperature limits.
- The information and technical recommendations provided in this document reflect United Initiators’ current knowledge and experience regarding the product and its applications, based on its internal research and development.
- United Initiators makes no warranty regarding the specific performance of the products or their suitability for particular applications, nor does it provide complete instructions for use.
- United Initiators does not guarantee the performance of the products or their shelf life, nor does it assume any legal liability for the use of the products, including liability related to existing third-party intellectual property rights (particularly patent rights).
- United Initiators reserves the right to make any changes based on technical progress or further developments.
- The use and application of our products based on technical recommendations are beyond our control and are strictly at the user’s own risk; users remain obligated to carefully inspect and test the products they receive to verify their suitability for the intended application.