Physical Properties
Half-Life Data
Decomposition Products: acetophenone, methane, 2-phenylisopropanol
Aliases & Synonyms
- Also written as
- Bis(1-methyl-1-phenylethyl) peroxide
- Other names
- bis(alpha,alpha-dimethylbenzyl) peroxide · diisopropylbenzene peroxide · DCP
- Also supplied under these brand names*
- Di-Cup · Perkadox BC · Luperox 500(Commercial Reference)*
* Brand names are trademarks of their respective owners and are referenced for identification purposes only. LAAP products are not manufactured or endorsed by these companies.
Overview
Dicumyl peroxide (DCP, CAS 80-43-3) is the most widely used crosslinking peroxide globally, suitable for a broad range of applications: • XLPE cable insulation crosslinking — the dominant peroxide for medium/high-voltage power cable manufacturing • Silicone rubber crosslinking (heat-cured silicone, HTV silicone) • EPDM rubber vulcanization for automotive weatherstrips and seals • Polypropylene controlled degradation (visbreaking) • Wire and cable jacketing materials LAAP's DCP99 (≥99% purity) is specifically formulated for demanding cable applications. Available as white powder, pastilles, or masterbatch blends for easy incorporation into cable compounds.
Technical Selection Guide
Product Overview
Dicumyl peroxide (DCP, CAS 80-43-3) is the most widely used crosslinking peroxide in the world, with ≥5.89% active oxygen and a 10-hour half-life temperature of 117°C. Its dominance comes from a combination of low cost, a well-understood cure profile, and a very broad application base — from XLPE power-cable insulation to EPDM vulcanization and polypropylene visbreaking.
Half-Life & Temperature Profile
DCP's 1-hour half-life of 135℃ and 10-hour half-life of 117℃ put the practical cure window at 160-190°C. In XLPE cable manufacture this is run in a continuous vulcanization (CV) tube; the key process variables are the DCP loading, the melt temperature in the extruder (which must stay well below the decomposition threshold to avoid scorch), and the cure-zone residence time. Because DCP decomposes to acetophenone, methane and 2-phenylisopropanol, adequate degassing is essential in high-voltage cable — acetophenone is both a byproduct and a known cause of voids if not removed.
Selection Within the Same Family
The DCP/BIPB comparison is the single most common decision in this family. DCP is cheaper and has a virtually identical decomposition temperature, but its acetophenone byproduct creates odour and taste issues. BIPB (CAS 25155-25-3) is odourless and is therefore the default for EPDM weatherstrip, silicone rubber, food-contact and interior automotive parts. Within the dialkyl family, DCP (117°C) sits just below TBCP (CAS 3457-61-2, 120°C) and DTBP (CAS 110-05-4, 121°C); for lower-temperature processes choose BIPB or DTAP (CAS 10508-09-5, 108°C).
Quality, REACH & Documentation
LAAP DCP99 is ≥99% pure, supplied as white crystalline powder. Typical controls are assay, active oxygen, melting point and appearance. Each batch ships with a CoA; REACH-compliant SDS and a TDS with the half-life table and recommended dosages are available.
Packaging, MOQ & Lead Time
Standard packing is 20 kg corrugated boxes containing four 5 kg plastic bags, with custom packaging on request. SADT is 75°C and the recommended storage temperature is 30°C. Minimum order quantity starts at 25 kg, and quotations are returned within 24 hours.
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Lanzhou, Gansu, China