Processes for producing filter cartridge assemblies and molded polyurethane elastomers

A process of making a filter cartridge assembly comprising an end member and a body comprising a filter medium, comprising affixing the end member to an end of the body, wherein the end member is a polyurethane elastomer that is a reaction product of a non-foaming reaction mixture comprising an isocyanate-reactive composition and an organic polyisocyanate prepolymer having an internal mold release agent, wherein the isocyanate-reactive composition comprises a mixture of polyols formulated to provide a polyurethane elastomer having a Shore D hardness, measured according to ASTM D2240-15, within 10 minutes after production that is at least 60% of the Shore D hardness of the polyurethane elastomer measured 16 hours after production, wherein the mixture of polyols comprises 1% to 10% by weight, based on the total weight of isocyanate-reactive ingredients in the isocyanate-reactive composition, of a polyether tetrol that is an alkylene diamine-alkylene oxide adduct having a number average molecular weight of 150 to 500 gram/mole.