AMERICAN CYANAMID <ACY> BUYS U.K. COMPANY American Cyanamid Co said it bought the 50 pct interest of Cyanamid Fothergill Ltd held by <Fothergill and Harvey PLC>, making the unit a wholly owned subsidiary. The unit manufactures structural materials, including advanced composites, adhesives, and aluminum honeycomb for the European space industry. The current management will remain in place and the unit will continue at its locations in Wrexham, U.K., the company said.