Mr. Anon Sirisaengtaksin, Chief Executive Officer of PTT Global Chemical (PTTGC) and Mr. Bowon Vongsinudom, President of PTT Polyethylene Co., Ltd. (PTTPE) jointly signed the master amendment in relation to agreements for purchase and sale of products including ethane, LPG, and propane between PTT Global Chemical and PTTPE with Mr. Peerapong Achariyacheevin, Senior Executive Vice President - Gas Business Unit of PTT. Dr. Pailin Chuchottaworn, President and Chief Executive Officer of PTT presided over the ceremony along with PTT Global Chemical executives who attended the event on 15 August 2012 at Palang Thai Room 1 on 3rd Floor, Tower 1, PTT Head Office.