 BERWYN, Pa.--BUSINESS WIRE--- TSE aristechsurfaces--Trinseo NYSE: TSE, a global materials company and manufacturer of plastics and latex binders, announced today the completion of the previously disclosed transaction to acquire Aristech Surfaces LLC Aristech, a leading North America manufacturer and global provider of polymethyl methacrylates PMMA continuous cast, solid surface and architectural resin sheets serving the wellness, architectural, transportation and industrial markets. This acquisition is anoth 