...+ We anticipate that for the next 12 months, TPC Group Inc.'s operating performance will be weaker than we previously expected, primarily due to pricing pressures. + In addition, TPC Group Inc.'s leverage has not improved over recent quarters, as was our expectation, and we believe that leverage is unsustainable in the current operating environment. + As a result, we lowered our corporate credit rating to '###+' from 'B-'.We also lowered the issue-level rating on the company's first-lien secured debt to '###+' from 'B-.' Our recovery rating remains '4' (lower half of the 30%-50% range). + The negative outlook reflects the refinancing risks associated with the company's late 2017 asset-based loan (ABL) maturity. We expect that the company's liquidity position may deteriorate once the ABL becomes current. NEW YORK (S&P Global Ratings) Sept. 13, 2016--S&P Global Ratings said today that it lowered its corporate credit rating on Texas-based TPC Group Inc. to '###+' from 'B-'. The outlook is...