Kuraray Co. Ltd. (TYO:3405) announced on March 7 that it has inked a joint venture agreement with Sumitomo Corp. (TYO:8053) and Thai-based PTT Global Chemical PCL (PTTGC) for a butadiene derivative business. The three companies began detailed feasibility studies in September 2016. Ahead of the final decision on investment, they signed an agreement to hold further discussions and to file…