1. Arkema S.A.
2. Arxada AG
3. Asahi Kasei Corporation
4. Celanese Corporation
5. Dic Corporation
6. Huntsman International LLC
7. Mitsubishi Chemical Corporation
8. Olin Corporation
9. Polyplastics Co. Ltd. by Daicel Corporation
10. Saudi Basic Industries Corporation by Saudi Aramco
11. Shin-Etsu Chemical Co. Ltd.
12. Solvay SA
13. The Dow Chemical Company
14. Yunda Electronic Materials Co. Ltd.
15. Zeon Corporation