Zeon Corp. (TYO:4205) needs to quickly find and master new solution styrene butadiene rubber (S-SBR) technology in order to develop a distinctive position, says President Kimiaki Tanaka. Sitting down recently for an interview, Tanaka said that with Zeon and Sumitomo Chemical Co. Ltd. (TYO:4005) having agreed to merge their S-SBR operations under a new joint venture, we will see a…