MOSCOW (MRC) -- Shintech, a subsidiary of Shin-Etsu Chemical Co. and the largest US polyvinyl chloride (PVC) producer, has shut its 1.45 million mt/year PVC operations in Freeport, Texas, on a lack of upstream vinyl chloride monomer (VCM) supply, sources familiar with company operations told S&P Global Sept. 7.The shutdown of the largest PVC plant in the US pushed the amount of US PVC ca