Visico FR4450/LE4439 is a scorch retardant, moisture-crosslinking polyethylene compound for low voltage insulation.

FR4450/LE4439 is a natural, zero halogen, moisture-induced crosslinking polyethylene compound that is designed for use as low voltage wire insulation and jacketing. The combination of a VISICO FR4450 base resin, and the LE4439 catalyst, provides a highly scorch retardant compound with excellent thermal stability and good retardant flame properties. FR4450/LE4439 contains a patented scorch retardant additive (SRA) that increases the processing window for a moisture crosslinking compound and minimizes the tendency for premature crosslinking in the extruder, head or die.

A finished compound that is composed of 95 parts of FR4450 mixed with 5 parts of LE4439 is recognized by Underwriters Laboratories as VISICO FR4450/LE4439 95/5. FR4450/LE4439 is designed to reduce normal PE flame spread characteristics and achieve an HB-1 flame rating on 14 AWG wires and larger. LE4439 also provides, in addition to catalyst, a stabilization package containing suitable antioxidants, a metal passivator and a metal deactivator. Properly mixed, during the extrusion process, FR4450/LE4439 exhibits excellent thermal stability to oxidation.

FR4450/LE4439 is readily pigmented to a variety of colors using standard wire & cable color concentrates designed for thermoplastic or crosslinked polyethylene.

Application
FR4450/LE4439 is recommended for use as insulation and sheath for low voltage control cables and power cables up to 6kv in rating.

Specifications

• UL 44