DENVER--(BUSINESS WIRE)--Trinseo (NYSE: TSE), a global materials solutions provider and manufacturer of plastics, latex binders and synthetic rubber, has signed a definitive agreement to acquire API Applicazioni Plastiche Industriali S.p.A. The transaction is expected to close in the third quarter of 2017, following customary closing conditions. Trinseo is funding the purchase of API's shares through its existing cash on hand. Per the terms of the transaction, Trinseo will acquire API's manufac