Asahi Kasei Corp. (Japan)
Chi Mei Corp. (Taiwan)
China National Petroleum Corporation (China)
Dynasol Elastomers (USA)
En Chuan Chemical Industries Co., Ltd (Taiwan)
Firestone Polymers LLC (USA)
INEOS Styrolution Group GmbH (Germany)
Kraton Corp. (USA)
LCY Chemical Corp. (Taiwan)
LG Chem (South Korea)
RTP Company (USA)
Sinopec Corp. (China)
TSRC (Taiwan)
Versalis S.p.A. (Italy)