A dry bleaching composition, particularly useful for low temperature applications, is provided in which generation of hypochlorite by reaction between a peroxygen bleaching agent and a chloride salt is promoted by an aromatic diol or oxidized aromatic diol activator. Preferred activators are in ester form and provide hypochlorite generation at levels of less than about 20 ppm for at least about the first two minutes following dissolution of the compositions in aqueous solution, but rising to effective bleaching levels within a reasonable time thereafter. The initially low hypochlorite level assists in the functioning of laundry additives, such as fabric brighteners.
提供了一种干法漂白组合物,尤其适用于低温应用,其中芳香族二元醇或氧化芳香族二元醇活化剂可促进过氧漂白剂与
氯盐反应生成
次氯酸盐。 优选的活化剂为酯形式,在组合物溶解于
水溶液后的至少最初两分钟内,
次氯酸盐生成量低于约 20 ppm,但随后会在合理时间内升至有效漂白
水平。 最初较低的
次氯酸盐
水平有助于织物增白剂等洗衣添加剂发挥作用。