Heat resistance, water resistance and bin storage stability in CSM hose compounds

Achieving optimum heat and water resistance in chlorosulfonated polyethylen e (CSM) based compounds has usually required the use of lead containing mat erials as acid accepters. Bin storage stability, or specifically poor or ma rginal bin stability, can be an issue with some CSM formulations under hot, humid storage conditions. This paper discusses results showing hydrotalcit e is a suitable replacement for lead in heat and water-resistant CSM formul ations. It also discusses ways to compound CSM for improved bin stability a nd the use of maleated polybutadiene resins as mill release agents having m inimal impact on bin stability.