Denka Co. Ltd. (TYO:4061) aims to quickly achieve sales of 50 billion yen ($459 million) in the chloroprene rubber (CR) business. This follows the acquisition last year by the Japanese chemical manufacturer of DuPont’s CR business in the U.S. The president of Denka, Shinsuke Yoshitaka, wants to achieve this sales goal in the next 1–2 years. According to Denka, the…