Compounding — Process Challenge

Peroxide Crosslinking for XLPE & Rubber

Wire & cable, PE-foam and EPDM/silicone rubber processors use organic peroxides to free-radical crosslink polyethylene and elastomers, the alternative to the moisture/silane route, selecting by decomposition temperature and scorch safety. Co-agents raise crosslink density and cure efficiency
Updated Jun 2026
Solution Approach

RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Formulation Workflow
1
Polymer & Process Definition
Identify the resin and process (extrusion, molding, film) and the targets — thermal stability, clarity, flame retardance, slip, or color.
2
Additive Selection
Match stabilizers, antioxidants, plasticizers, lubricants, flame retardants, or masterbatch carriers to the polymer and processing temperatures.
3
Compounding Trial
Confirm loading and dispersion on a compounding or molding trial, checking processability, mechanicals, and aesthetics against the control.
4
Validation & Scale-Up
Verify long-term performance (heat aging, migration, weathering) and lock the formulation, packaging, and lot specs for production.
Recommended Chemistries (5)
Dicumyl Peroxide (DCP)
CAS 80-43-3
Specialty Additives
Crosslinking / Curing
3110 (DICUMYL PEROXIDE) · Class
Generates cumyloxy radicals on heating that abstract hydrogen from PE and elastomer chains to form C-C crosslinks; the workhorse XLPE/rubber peroxide
Physical Description: White to yellow solid; mp = 39 deg C; Fine fain…   Appearance: Pale yellow to white granular solid   Boiling Point: 130 °C at 760 mmHg (decomposes)
Quick view
Full Details
2,5-Dimethyl-2,5-di(t-butylperoxy)hexane (Luperox 101 type)
CAS 78-63-7
Higher-temperature difunctional peroxide giving better scorch safety and crosslink efficiency for EPDM and silicone cure (source on demand)
Quick view
Full Details
Di(t-butylperoxyisopropyl)benzene (BIPB)
CAS 25155-25-3
Low-volatility solid peroxide for XLPE wire & cable with reduced blooming (source on demand)
Quick view
Full Details
Triallyl isocyanurate (TAIC)
CAS 1025-15-6
Multifunctional crosslink co-agent; the allyl groups boost crosslink density and grafting efficiency (source on demand)
Quick view
Full Details
Triallyl cyanurate (TAC)
CAS 101-37-1
Co-agent that raises the state of cure and lowers peroxide demand (source on demand)
Quick view
Full Details

Need help selecting the right chemistry?

Our team can help with grade selection, dosage guidance, and multi-origin sourcing.

Request Quote All Plastics & Polymers Problems
Request Quote