POLYURETHANE-BASED ELASTOMER FOAM SUITABLE FOR BATTERY POTTING

The present disclosure provides a reaction system for producing a polyurethane-based elastomer foam, the reaction system comprising: component A) an isocyanate component comprising a hard block prepolymer; and component B) an isocyanate-reactive component comprising: a polyol; a first chain extender and a second chain extender which is different from the first chain extender, wherein the first and second chain extenders are each an aliphatic diol having from 2 to 6 carbon atoms; a blowing agent; optionally a surfactant; and optionally a catalyst.