1. Arkema S.A.
2. Asahi Kasei Corporation
3. Aurora Plastics
LLC
4. Avient Corporation
5. BASF SE
6. Biesterfeld AG
7. Celanese Corporation
8. China Petroleum & Chemical Corporation
9. Covestro AG
10. Distrupol Limited
11. DuPont de Nemours Inc.
12. Elastron Kimya Sanayi ve Ticaret A.?.
13. Evonik Industries AG
14. Exxon Mobil Corporation
15. Huntsman International LLC
16. KRAIBURG TPE
17. Kraton Corporation by DL Chemical Co. Ltd.
18. LCY Chemical Corp.
19. Lubrizol Corporation
20. LyondellBasell Industries N.V.
21. Mitsubishi Chemical Holdings Corporation
22. Mitsui Chemicals Inc.
23. Moriroku Chemicals Company
Ltd.
24. RTP Company
25. Shin-Etsu Polymer Co. Ltd.
26. SIBUR International GmbH
27. Teknor Apex Company Inc.
28. The Dow Chemical Company
29. Tosoh Corporation
30. TSRC Corporation
31. Zeon Corporation