Judge holds Hexion to buyout of Huntsman

A Delaware judge has refused to allow Hexion Specialty Chemicals to walk away from a $6.5 billion buyout of chemicals maker Huntsman Corporation.

In a ruling late Monday, Vice Chancellor Stephen Lamb ordered Hexion to use its best efforts to complete the deal.

Lamb also denies Hexion's claim that Huntsman was not entitled to a $325 million break up …