Advanced Petrochemical Company Akro-Plastc Gmbh Celamese Sales Germany Gmbh Covestro Deutschland Ag Exxonmobil Hanwha Totalenergies Petrochemical Co., Ltd. Hip Petrohemija Idemitsu Kosan Co., Ltd. Kazakhstan Petrochemical Industriesinc Kumho Polychem Co., Ltd. Lotte Chemical Corporation Lyondellbasell Industries Mehr Petrochemical Company Qatar Petrochemical Company Repsol Sahara International Petrochemical Company Saudi Basic Industries Corporation Shell Usa, Inc Sibur Holding Sk Geo Centric Solvay (Solalene) The Sanmar Group Totalenergies Uz-Kor Gas Chemical Versalis S.P.A. Yuhwa Korea Petrochemical Ind. Co., Ltd.