...December 17, 2020 - TPC Group Inc. still faces challenges related to its currently idled Port Neches (PNO), Texas, facility. In addition, the company's operating performance has been impaired by the COVID pandemic. As a result, TPC's volumes and earnings have declined significantly. - This has led to a deterioration in debt leverage, which S&P Global Ratings believes is currently unsustainable. Additionally, the company faces refinancing risk in 2021. - Therefore, we are lowering our issuer credit rating on TPC Group Inc. to '###' from 'B-'. The outlook is negative. - At the same time, we are lowering our rating on the company's senior secured notes to '###' from 'B-'. The recovery rating remains '4', indicating our expectation of average (30%-50%; rounded estimate: 30%) recovery in the event of a payment default. - The negative outlook reflects economic uncertainty around the economy, uncertainty around the timing of potential insurance proceeds, and the company's upcoming term loan maturity...