Making resins for industrial coatings is a generally sleepy business, but two large acquisitions are livening the field up. PTT Global Chemical has agreed to purchase the industrial coating resin producer Allnex from the private equity firm Advent International for $4.8 billion. And the private equity firm Lone Star Funds will buy the resin producer AOC from fellow private equity firm CVC Capital Partners and minority owner DSM. Based in Frankfurt, Germany, Allnex has annual sales of about $2.4 billion, as well as 4,000 employees, 33 manufacturing sites, and 23 research and technology facilities. It makes a range of industrial coating polymers and additives, including powder resins, waterborne resins, energy-curable resins, cross-linking resins, and additives for use on substrates such as wood, metal, and plastic. PTT, a Thailand-based petrochemical maker, says it will invest in Allnex to develop novel resins, including those based on sustainable technologies. Under its new owners,