MOSCOW (MRC) -- Shintech, a subsidiary of Shin-Etsu Chemical Co. and the largest US polyvinyl chloride (PVC) producer, will start up the first phase of an expansion across theВ PVC production chain at its Louisiana complex in September, according to Yasuhiko Saitoh, president of Shintech's Japanese parent Shin-Etsu, reported S&P Global.Saitoh's comments were in a transcript of discussions