A conjugated diene-based polymer which includes a repeating unit (a) derived from a conjugated diene compound in a relative amount of 45 to 99 mass %; a repeating unit (b) derived from an aromatic vinyl compound in a relative amount of 0 to 40 mass; and a ...

A microporous film which is excellent in permeability and mechanical strength and has breakage resistance at high temperatures; a separator for a nonaqueous-electrolyte battery which comprises the microporous film; and a nonaqueous-electrolyte battery empl...