DuPont announced that it has entered into a definitive agreement with Advent International, one of the world’s largest private equity firms, to acquire Laird Performance Materials for $2.3 billion which will be paid from existing cash balances.    The transaction is expected to close in the third quarter of 2021, subject to regulatory approvals and other customary closing conditions.   Laird Performance Materials is a world leader in high-performance electromagnetic shielding and thermal...