Deal round-up: Airgas, Rohm&Haas, JRC, WaMu

  Rohm & Haas Co. has paid $40 million for a controlling share of Gracel Display Inc., a South Korea-based developer and manufacturer of organic light-emitting diode (OLED) materials, which are used in cell phones, MP3 players and other flat-panel display. 
  That follows Rohm & Haas's sale, announced Friday, of its 40 percent interest in UP Chemical Company, a South Korean firm that specializes in DRAM technology used in semiconductors, to South Korea's Woori Consortium. 
   Gracel story at           Rohm & Haas releases at
   Airgas, Radnor, won't say what it's paying for A&N Plant, a European supplier of welding equipment with $20 million in yearly sales. Brief story at   
   Journal Register Co., Yardley, says it's hired Lazard Freres as its investment banker, according to a press release posted at Marketwire:           
   Washington Mutual Inc. shares are up sharply today on speculation the beleagured national home lender is about to get a big investment. See Bloomberg story at