Lanxess will build in Changzhou, China, what it says will be the world’s largest ethylene propylene diene (EPDM) rubber plant. The German chemical maker says it will invest about $300 million in the facility, which will open in 2015 with annual capacity of 160,000 metric tons. Raw material ethylene and propylene will come from a methanol-to-olefins facility under construction near Lanxess’ site in the Changzhou Yangtze Riverside Industrial Park. The company notes that it has all necessary permits and that it is already building a $38 million leather chemicals plant in Changzhou. Lanxess became the world’s leading EPDM supplier, with 320,000 metric tons of capacity, after its acquisition of DSM Elastomers last year.