Physical Properties
Half-Life Data
Decomposition Products: tert-butyl alcohol, diisopropylbenzene, acetylbiphenyl, acetyl-2-hydroxyisopropylbenzene, methane, acetone
Aliases & Synonyms
- Also written as
- Bis(tert-butylperoxyisopropyl)benzene
- Other names
- 1,4-bis(2-tert-butylperoxypropan-2-yl)benzene · alpha,alpha'-bis(tert-butylperoxy)-p-diisopropylbenzene · BIPB
- Also supplied under these brand names*
- Perkadox 14 · Luperox F · Peroximon F 40(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
BIPB (CAS 25155-25-3, Di(tert-butylperoxyisopropyl)benzene) is a highly efficient, odorless crosslinking agent for plastics and rubbers, widely used as a superior alternative to Dicumyl Peroxide (DCP). Sourced directly from LAAP's factory in China, BIPB 25155-25-3 is extensively employed in the crosslinking of EPDM, EVA, CPE, and silicone rubber. Key applications for CAS 25155-25-3 include: • Wire and cable insulation crosslinking (halogen-free cables, XLPE cables) • Foam shoe soles (EVA foam crosslinking with precise density control) • Polyolefin pipe production (PE-Xa, PE-Xb) • Automotive rubber seals and gaskets requiring odor-free vulcanization • Silicone rubber molding (HTV/LSR crosslinking) • CPE and CSM rubber compounding BIPB 25155-25-3 offers a high decomposition temperature (1h half-life at 118°C), making it ideal for high-temperature processing without premature crosslinking. LAAP is a leading manufacturer and supplier of BIPB (CAS 25155-25-3) in China, offering factory-direct pricing with REACH certification and cold-chain export to Russia, Southeast Asia, and 30+ countries. Learn more about <a href="/crosslinking-peroxide">crosslinking peroxides from China</a>.
Technical Selection Guide
Product Overview
Di(tert-butylperoxyisopropyl)benzene (BIPB, CAS 25155-25-3) is a bifunctional dialkyl peroxide with 9.45% active oxygen and a 10-hour half-life temperature of 115°C. Because both peroxide groups are attached to the same benzene ring, crosslinking proceeds through a single, thermally stable aromatic backbone — which is why BIPB has become the standard replacement for DCP in odour-sensitive rubber and polyolefin compounds.
Half-Life & Temperature Profile
With a 10-hour half-life of 115℃, BIPB is designed for cure temperatures between 150°C and 180°C. The 1-hour value of 134℃ and the 0.1-hour value of 156℃ show how quickly the decomposition accelerates once the process passes 150°C — the practical implication is that residence time, not peak temperature, controls the degree of crosslinking. In continuous vulcanization (CV) lines for cable, BIPB is normally run in the 170-200°C zone; in compression moulding of EVA foam, the press temperature is set 5-10°C below the CV line to compensate for the longer dwell.
Selection Within the Same Family
The BIPB/DCP choice is the most common decision in this family. DCP (CAS 80-43-3) is cheaper and has a very similar 10-hour half-life (117°C), but it decomposes to acetophenone, which carries a strong odour and is the usual cause of failed sensory tests. BIPB's decomposition products — tert-butyl alcohol and diisopropylbenzene — are essentially odourless, so BIPB is preferred for EPDM weatherstrip, HTV silicone, food-contact rubber and interior automotive parts. Against BPDH (CAS 78-63-7, 128°C), BIPB is the lower-temperature option; against DTAP (CAS 10508-09-5, 108°C), BIPB is the higher-temperature option.
Quality, REACH & Documentation
Standard BIPB grades are ≥96% active with an activation energy of 152.69 kJ/mole. Typical controls are assay, active oxygen, appearance (white powder or flakes) and melting behaviour. Each batch ships with a CoA; REACH-compliant SDS and a TDS carrying the half-life table and recommended dosages are available on request.
Packaging, MOQ & Lead Time
Standard packing is 20 kg corrugated boxes; custom sizes are available. SADT is 80°C and the recommended storage temperature is below 15°C, so product should be kept out of direct sunlight and away from heat sources. Minimum order quantity starts at 25 kg, stock grades ship in 7-14 days, and quotations are returned within 24 hours.
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Lanzhou, Gansu, China