Mitsui Chemicals Inc. (TYO:4183) achieved a strong performance in the first half of fiscal 2015 (April–September) for EPDM (ethylene propylene diene terpolymer) rubber. Contributing factors were a weak yen and low naphtha prices. Shanghai Sinopec Mitsui Elastomers Co. Ltd. (SSME), Mitsui Chemicals’ joint venture for EPDM production in China that went onstream at the end of 2014, started up again in...