2,4-Diphenyl-4-methyl-1-pentene

2,4-Diphenyl-4-methyl-1-pentene (CAS 6362-80-7, EC 228-846-8) is an alpha-methylstyrene dimer supplied under trade designations including DK 80, DK 81, Nofmer MSD, and Alpha Methylstyrene Dimer. It carries no assigned E-code and has the molecular formula C18H20.

In plastics and rubber manufacturing, this compound functions as a polymerization modifier and chain-transfer agent, controlling molecular weight during free-radical polymerization of styrene-based and rubber systems. It acts by terminating growing polymer chains at a defined chain length, enabling processors to tune melt flow and mechanical properties with precision.

This material is registered under REACH and available in standard industrial drum and IBC packaging formats suited to bulk procurement. Buyers should confirm supplier documentation for purity grade and batch traceability in line with their internal qualification requirements.