The present invention relates to new derivatives of N-(2,2-dichlorovinyl)salicylamide and use thereof for controlling bacteria, fungi and algae which propagate on industrial raw materials, industrial products and in water in circulating water systems.
The bacteria and fungi on industrial raw materials and products degrade the quality of industrial raw materials and products and cause various other troubles. The damage is very serious. The algae which propagate on the bottom of ships cause the slowdown of speed of ships.
Bacteria, fungi and algae in water in circulating water systems produce mats of slime which restrict the flow of water and reduce the efficiency of heat exchange. They constitute a considerable problem.
Many compounds having bactericidal, fungicidal and algicidal activity are used for prevention of the damage caused by the bacteria, fungi or algae to industrial raw materials and products and the impediment caused by slime in circulating water systems. These compounds include, for example, organic mercury compouds, organic tin compounds, phenols having substituted halogen atoms, organic sulfur compounds, formalin, cresol and quaternary ammonium salts. These compounds, however, have various defects, for example, strong toxicity against humans and live-stock, pollution of environment, irritative or offensive odor, bad influence upon industrial raw materials and products and weak bactericidal, fungicidal activity.