1. Asahi Kasei Corporation
2. Celanese Corporation
3. Covestro AG
4. DuPont de Nemours Inc.
5. Mianyang Prochema Commercial Co. Ltd.
6. Mitsubishi Chemical Holdings Corporation
7. Rogers Corporation
8. Sumitomo Chemical
9. Tekra
10. Teraoka Seisakusho Co. Ltd.