UPDATE 1-Indalex files for Ch. 11 bankruptcy

NEW YORK, March 20 (Reuters) - Indalex Inc [INDHFO.UL], an Illinois maker of soft alloy aluminum extrusion products, filed for Chapter 11 bankruptcy protection on Friday, according to court documents.

Indalex and four affiliates listed assets of between $100 million to $500 million and liabilities of between $100 million to $500 million, according to documents filed with the U.S. Bankruptcy Court in the District of Delaware.

Indalex's largest unsecured creditors include Alcoa Inc (AA.N) to which it owes $6 million, and Rio Tinto Alcan(RIO.L)(RIO.AX), which it owes $5 million.

The case is In re: Indalex, U.S. Bankruptcy Court, District of Delaware, No. (Reporting by Phil Wahba; editing by Carol Bishopric)