SUSTAINED-RELEASE AGENT FOR CONTROLLING ALGAE AND LEGIONELLA BACTERIA WHICH CONTAINS DITHIOL COMPOUNDS EXHIBITING SUSTAINED RELEASE PROPERTIES BY MICROENCAPSULATION AND CYCLODEXTRIN INCLUSION AS EFFECTIVE INGREDIENT HAVING INCREASED DURABILITY AND REDUCED TOXICITY SUCH AS SKIN IRRITATION

摘要

PURPOSE: A sustained-release agent for controlling algae and Legionella bacteria containing dithiol compounds exhibiting sustained release properties by microencapsulation and cyclodextrin inclusion as an effective ingredient is provided. It is improved in skin irritation and useful in controlling algae and Legionella bacteria present in recycled water of a cooling tower, circulating cooling water of a freezing apparatus, cold and warm water systems, heat accumulation systems such as warm water pools, bathrooms or the like. CONSTITUTION: The sustained-release agent for controlling algae and Legionella bacteria contains: a dithiol compound of the formula 1 and additionally one or more of corrosion inhibitors, scale inhibitors, defoamers and surfactants. In formula, R1 and R2 exhibit H or halogen and are each the same or different. The sustained release is microencapsulation and cyclodextrin inclusion. For an example, 95% by weight of microencapsulated formulations are mixed with 30% by weight of diethanolamine as corrosion inhibitors and 2% by weight of dimethyl silicone oil as defoamers.