Dicumyl Peroxide
CAS Number: 80-43-3
Featured inIndustrial Catalysts
Dicumyl peroxide (DCP) is a dialkyl peroxide crosslinking agent and high-temperature initiator with a 10-hour half-life at 115°C. It is the most widely used peroxide for crosslinking polyethylene (XLPE), ethylene-propylene rubber (EPR/EPDM), and silicone compounds. DCP produces cumyloxy radicals that abstract hydrogen from polymer chains to initiate crosslinking.
Technical Specifications
| appearance | White crystalline granules or powder |
| purity (%) | ≥99.0 |
| melting point (°C) | 40–42 |
| active oxygen content (%) | 5.8–6.0 |
| 10-hour half-life temperature (°C) | 115 |
Applications
- XLPE crosslinking for medium and high voltage cable insulation
- EPDM and EPR rubber compound vulcanization
- Silicone rubber compression and injection molding crosslinking
- Peroxide crosslinking of EVA and thermoplastic elastomers
- Reactive extrusion grafting of maleic anhydride on PP/PE
Key Features
- Industry-standard peroxide for PE, EPDM, and silicone rubber crosslinking
- Solid form offers convenient handling and long ambient-temperature shelf life
- Produces only acetophenone and methanol by-products, manageable by process venting
- Adjustable crosslink density by varying DCP loading from 0.5–3.0 phr
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CAS Number
80-43-3
Category
Polymer Synthesis ChemicalsAvailability
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