Brussels — Solvay and Eastman Chemical Company have signed a definitive agreement to end their cellulose acetate production joint venture Primester with Solvay acquiring Eastman’s 50 percent stake in the U.S.-based plant and becoming its sole owner.

“After our partnership of 25 years, this agreement allows Solvay to continue securing the most economical long term supply of cellulose acetate flake for its own tow business in Germany, Brazil and Russia, while adapting capacity to demand,” said Philippe Rosier, President of Solvay Global Business Unit Acetow.

Following the transaction, Eastman will provide the long-term supply of basic utilities and raw materials to the plant, based in Kingsport, Tennessee.

Closing should occur in the second quarter of 2016, subject to customary regulatory approvals.