Westlake Chemical Acquires CertainTeed's PVC Pipe, Fittings and Foundations Business
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HOUSTON , March 6, 2013 /PRNewswire/ -- Westlake Chemical Corporation (NYSE: WLK) announced today that it has entered into a definitive agreement with CertainTeed Corporation , a subsidiary of the French public company, Compagnie de Saint-Gobain , to purchase its Pipe and Foundation Group (PFG), a