DCPD

Dicyclopentadiene, commonly abbreviated DCPD, is a bicyclic hydrocarbon and a dimer of cyclopentadiene with the formula C12H12. It exists as a mixture of endo and exo isomers and is produced industrially by the Diels–Alder dimerization of cyclopentadiene, typically derived from refinery streams. In commercial use, DCPD is stabilized with small amounts of inhibitors to prevent spontaneous polymerization during storage and handling.

The principal application of DCPD is as a monomer or co-monomer for polydicyclopentadiene (PDCPD) resins, a family of thermosetting polymers formed by ring-opening metathesis polymerization (ROMP). PDCPD resins are valued for chemical and heat resistance, stiffness, and dimensional stability, and they are used in corrosion-resistant linings for tanks and pipes, flooring, automotive components, and cast parts. DCPD can also serve as an intermediate in chemical syntheses and as a crosslinking agent in polymer formulations.

Handling and safety information point to its flammability and potential irritation to skin, eyes, and respiratory tract. DCPD can be reactive toward air and moisture and may form peroxides under certain storage conditions, particularly if inhibitors are depleted. It is typically stored under cool, well-ventilated conditions with stabilizers and away from ignition sources. Appropriate personal protective equipment and good storage practices are recommended when working with DCPD.

In summary, DCPD is a stabilized dimer of cyclopentadiene widely used as a key feedstock for PDCPD resins, offering advantageous properties for corrosion resistance and mechanical performance in industrial applications.