- Arkema SA
- Asahi Kasei Corporation
- BASF SE
- DuPont
- Celanese Corporation
- Chevron Phillips Chemical Company LP
- LyondellBasell Industries
- Daicel Corporation
- Eastman Chemical Company
- Evonik Industries AG
- Lanxess AG
- LG Chem
- Mitsubishi Engineering Plastic Corporation
- Polyplastic Co. Ltd
- Royal DSM
- SABIC Innovative Plastics
- Solvay
- Teijin Chemicals Limited
- A. Schulman Inc.
- INOES
- Dyneon LLC
- Rochling Group