SINGAPORE (Standard&Poor's) Sept. 3, 2012--Standard&Poor's Ratings Services assigned its 'BBB' issue rating to Thailand-based PTT Global Chemical Public Co. Ltd.'s (PTTGC) proposed senior unsecured fixed-rate notes. PTTGC plans to use the proceeds from the notes for capital spending and general corporate purposes. Our 'BBB' corporate credit rating and 'axA' ASEAN regional scale rating on PTTGC reflect the company's solid competitive position, favorable cost structure, diverse operations, and significant business integration with its parent, PTT Public Co. Ltd. (PTT; BBB+/Stable/--). PTTGC's exposure to industry risk and price volatility, and the weak outlook for the refining and petrochemicals industry partly offset these strengths. We assess the stand-alone credit profile of PTTGC at 'bbb-'. Our 'BBB' corporate credit rating