BRINDISI, Italy (Jan. 15)—Dow Chemical Co. has indefinitely extended the shutdown of its methylene diphenylene isocyanate plant in Brindisi. The decision reflects lower MDI demand, tougher business conditions and a competitive business climate, said David Fischer, global business vice president of Dow Polyurethanes. The company said the shutdown has not and is not likely to cause a disruption in supply. The plant, which produced about 75,000 metric tons yearly, was initially shut down in December, idling about 180 workers. Future decisions on the factory will be based on the business environment, an evaluation of investment needs and the facility's competitive position.