Chemtura acquires full interest in DayStar Materials joint venture Chemtura Corporation announced that it has acquired UP Chemical’s 50% stake in DayStar Materials, a South Korean manufacturer and marketer of high-purity metal organic precursors for the LED market. Chemtura now owns a 100% interest in DayStar, which was formed in 2011 as a joint venture of Chemtura and UP Chem.
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