| Visico FR4450/LE4439 is a natural, halogen free, moisture-induced crosslinking polyethylene compound system designed for use as low voltage wire insulation and jacketing. The combination of Visico FR4450 base resin and LE4439 catalyst, provides a highly scorch retardant compound system with excellent thermal stability and good flame retardant properties. Visico FR4450/LE4439 contains a patented scorch retardant additive that increases the processing window for a silane crosslinkable compound system and minimizes the tendency for premature crosslinking in the extruder, head or die. A finished compound system that is composed of 95 parts of Visico FR4450 and 5 parts of LE4439 is recognized by Underwriters Laboratories as "Visico FR4450/LE4439". Visico 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, and a metal deactivator. Cable insulation with a proper mixture of Visico FR4450 (95 parts) and LE4439 (5 parts) exhibits excellent thermo-oxidative stability in contact with aluminum or copper. Visico FR4450/LE4439 can be readily pigmented to a variety of colors using standard wire & cable color concentrates designed for thermoplastic or crosslinked polyethylene. Applications: Visico FR4450/LE4439 is recommended for use as insulation and jacket for low voltage control cables and power cables up to 6 kV. Specifications: Visico FR4450/LE4439 in combination meets the applicable requirements as below when processed using sound extrusion and testing procedure: UL 44 and UL 854 Information provided by Borealis AG |
