It's been brutal for the chemicals industry. Dow Chemical (NYSE: DOW), for example, lost a multi-billion dollar joint venture deal with Kuwait. Then there was the implosion of the Huntsman (NYSE: HUN) buyout, which singed private equity operator, Apollo Management LP.

Now, there's another victim: Lyondell Chemical. The company, which is part of the LyondellBasell Industries AF empire, filed for bankruptcy.

Lyondell Chemical, a maker of polymers and petrochemicals, couldn't manage the price deflation as well as harsh materials costs. Although, the main problem was a $12.7 billion merger in 2007, which resulted in large amounts of debt.

Of course, the subprime crisis is a key element of the credit crunch. But there has also been another force: the huge build up of leveraged loans for mega buyouts.

Well, with the help of sovereign wealth funds -- and even some private equity firms, like TPG -- the subprime problem appears to be improving. And, interestingly enough, it looks like banks are also effectively dealing with the leverage loan overhang. This according to a piece in FinancialNews.com.

Basically, the backlog is now at $91 billion (which is a drop of nearly 60% so far this year). But we are already seeing signs that banks are opening up to new loans, such as with Basell's buyout of Lyondell Chemical Company. The major banks need the deal flow from private equity firms because of the juicy fees. So it's no surprise that we've seen a lot of action in getting things moving again.

Tom Taulli is the author of various books, including The Complete M&A Handbook and The Edgar Online Guide to Decoding Financial Statements. He also operates MergerBook.com.