Siperox® DHBP (commonly known as DHBP, 101, or 'Dicumyl Peroxide Analog') is an efficient, high-temperature organic peroxide crosslinking agent. It is particularly valued for its lack of volatility and low odor compared to other peroxides, making it an excellent choice for producing vulcanizates with high tensile strength and controlled elongation, especially in silicone rubber (VMQ) applications.
Siperox® DHBP
(Organic Peroxide Crosslinking Agent for Elastomers & Plastics)
Chemical Name: 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane
CAS No.: 78-63-7
EC No.: 201-132-3
Molecular structure:
| Product Grade | Appearance | Active Content (w/w) | Carrier / Filler | Melting Point |
|---|---|---|---|---|
| Siperox® DHBP (Pure) | Light yellow liquid | ≥ 92 % | -- | ~ 28 °C |
| Siperox® DHBP 50A | White powder | 49 - 51 % | SiO₂ (balance) | -- |
| Siperox® DHBP 50B | White powder | 49 - 51 % | SiO₂ (24-26%) / CaCO₃ (24-26%) | -- |
| Siperox® DHBP 40A | White powder | 39 - 41 % | SiO₂ (balance) | -- |
| Siperox® DHBP 40B | White powder | 39 - 41 % | SiO₂ (29-31%) / CaCO₃ (29-31%) | -- |
Siperox® DHBP is primarily used as a crosslinking agent (vulcanizing agent) for:
Silicone Rubber (VMQ): The preferred high-temperature curing agent for vinyl silicone rubber.
Other Elastomers: EPDM, Polyurethane Rubber, and various specialty rubbers.
Plastics: Crosslinking agent for Polyethylene (PE).
Thermosets: Curing agent for unsaturated polyesters.
Storage: Store in a cool (< 38°C), dry, well-ventilated place away from heat sources, direct sunlight, and ignition sources.
Packaging:
Liquid (DHBP): 25 kg PE plastic drum.
Powder Grades: 10 kg inner PE bag, 20 kg (2x10kg) per outer carton.
Transport: Avoid shock, friction, and exposure to excessive heat. Keep separated from strong acids, reducers, and combustibles.
Safety Classification:
UN Number: UN 3105
Hazards Class: Organic Peroxide, Type B (5.2)
Packing Group: PG II
This information is based on our current knowledge and is intended for general guidance. It is not a warranty of specific properties or a substitute for a comprehensive Safety Data Sheet (SDS). Users must obtain and review the SDS, conduct their own tests, and ensure compliance with all local regulations before handling or use.
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