Kumho Petrochemical Co. is a South Korean chemical company headquarters in Seoul. As of 2012, Kumho Petrochemical was the largest the manufacturing of synthetic rubbers with the world's largest production capacity based on styrene-butadiene rubber and butadiene rubber according to the International Institute of Synthetic Rubber Producers. The company focuses on synthetic rubbers, synthetic resins, specialty chemicals, electronic chemicals, energy, building materials and advanced materials as its core business. Wikipedia