Momentive Performance Materials Inc. said yesterday that it may file for chapter 11 protection and is in talks with stakeholders to restructure the debt of the silicone and quartz producer, Reuters reported yesterday. As of Sept. 30, the company had total liabilities of $4.14 billion, it said in a filing with the U.S. Securities and Exchanges Commission on Tuesday. The unit of Apollo Global Management LLC said that it was unable to file its annual report for the period ended Dec. 31, on March 31.