Elementis plc announced that it has agreed, through its wholly owned subsidiary Elementis Holdings Limited, to purchase Deuchem Co., Ltd., a Taiwan-based company, for a cash consideration of £40.4 million. Deuchem had £37.9 million in sales in 2007, with after-tax profits of £3.6 million.      Established in 1978, Deuchem is a leading supplier of additives and resins to the coating and related industries, with three sales offices in Taiwan and 11 sales offices in China, together with manufactu...