Application: TEGOMER® V-Si 4042 serves as process aid for highly loaded compounds containing carbon black or mineral fillers, like aluminum or magnesium hydroxide. TEGOMER® V-Si 4042 enhances the flame retardant properties of the compound. TEGOMER® V-Si 4042 can be used to produce halogen free flame retardant polyolefin and elastomeric compounds for cable application. By thermally initiated crosslinking reactions TEGOMER® V-Si 4042 can be introduced permanently into polymeric resins and is therefore even suitable for x-PE application. TEGOMER® V-Si 4042 is a process aid which improves the extrusion of EPM/EPDM compounds without changes in physical properties of the rubber article.

Benefits: TEGOMER® V-Si 4042 provides several benefits to the HFFR polymer formulation such as:

• improved polymer processing and lubrication of polymer resin
• excellent compatibilizing of (high addition levels of) inorganic fillers in the polymeric resin
• improved melt flow rates during processing
• excellent surface characteristics of cables
• no build-up of process aid on metal surfaces and no die drol appears
• excellent char formation
• low smoking cable formulation can be achieved
• low heat and smoke release
• significant improved Lower Oxygen Index (LOI)

• reduces the compound viscosity at higher shear forces for increased capacity or for reduced energy cost
• does not change mechanical properties as other process aids usually do
• reduces failures on the extruded surface

Information provided by Evonik