Rohm and Haas announced a price increase for acrylic copolymer emulsions, solution acrylic copolymers and additives sold to various industries in North America. The increase, which ranges from 5 percent to 8 percent, takes effect July 1, 2002.      This increase is necessary to address the increase in the cost of feedstocks and downstream raw materials, according to the company.      Rohm and Haas also announced a price increase, effective May 1, 2002, of 5 percent to 7 percent for styrene...