- Akzo Nobel NV
- Borealis AG
- Celanese Corporation
- Chevron Phillips Chemical Company
- Davis Standard
- DuPont de Nemours Inc.
- Dura Coat Products Inc.
- LyondellBasell Industries Holdings BV
- Optimum Plastics
- PPG Industries
- Qenos Pty Ltd
- SABIC
- The Lubrizol Corporation
- THE SHERWIN-WILLIAMS COMPANY
- Transcendia
- Westlake Chemical Corporation