| Visico " ME4425 / Ambicat " LE4479 is a silane crosslinkable natural compound system designed for insulation of low voltage energy cables. Visico ME4425 is a medium density polyethylene, copolymerized with vinyl silane. Ambicat LE4479 is an ambient crosslinking catalyst masterbatch specially designed to be used with Visico base resins to give reduced radial shrinkage in cables. The system is highly active and crosslinks quickly at ambient conditions, in sauna or in hot water. Cable insulation with a proper mixture of Visico ME4425 (95 parts) and Ambicat LE4479 (5 parts) exhibits excellent thermo-oxidative stability. The combination is suitable for both copper and aluminum conductors. If the insulation is designed to meet the thermo-oxidative ageing demand required by IEC 60502 at 150°C in contact with copper, the addition of 9 parts Ambicat LE4479 to Visico ME4425 is recommended. Applications: Visico"ME4425 / Ambicat"LE4479 is intended for following applications: Insulation of low voltage energy cables, range up to 6 kV Specifications: Visico"ME4425 / Ambicat"LE4479 is expected to meet the applicable requirements included in the below mentioned standards provided it is processed using sound material handling and processing practices as well as appropriate testing procedures. ASTM D1248 Type II, Class A, Category 4; HD 604 S1; IEC 60502-1; EN 50290-2-2; HD 603 S1 Typical characteristics: Visico"ME4425 / Ambicat"LE4479 can be described with following typical characteristics: - Excellent processing properties
- Very good curing speed
- Low scorch allowing long runs and more frequent tooling changes
- Excellent surface finish
- Environmentally friendly (free from heavy metals)
- Reduced radial shrinkage
- Less smell; more consistent quality (no volatiles)
- Excellent storage stability
- No drying prior to extrusion
The addition of metal soaps and basic (high pH) components, like some fillers, stearates and UV-stabilizers, will deactivate the catalyst and is not suitable together with Ambicat. To prevent deactivation of the catalyst during coloring, Ambicat compatible color masterbatches are needed. Please contact your Borealis representatives for additional information.Information provided by Borealis AG |
