U.S.-based Momentive Performance Materials Inc. has seen consecutive quarters of weaker earnings and profitability given a significant reduction in siloxane prices and a negative impact from its exposure to a weaker automotive sector. As a result, we are lowering our issuer credit rating on Momentive to 'B+' from 'BB-'. At the same time, we are lowering our issue-level rating on the company's senior secured credit facility to 'B+' from 'BB-'. The '3' recovery rating remains unchanged, indicating our expectation for meaningful (50%-70%; rounded estimate: 50%) recovery in the event of a payment default. The negative outlook reflects the potential that we will lower our rating on Momentive in the next 12 months if siloxane prices remain at depressed levels for