FRANKFURT, Germany (July 10)—Degussa A.G. has purchased the antioxidant business of Germany's Raschig GmbH, which trades primarily under the trade name Ralox. No financial details were disclosed. According to terms of the deal, Degussa will purchase the patents and know-how for the antioxidant product range, which helps protect polymers and synthetic rubbers from aging, it said. The acquisition will roughly double the size of Degussa's phenolic antioxidant business, Degussa said. Antioxidants are part of Degussa's Oligomers & Silicones business unit.