A bleach auxiliary for use as a peroxygen bleach catalyst comprising a water-soluble complex of iron and a multi-dentate ligand-forming chelating agent having defined bleach catalytic activity and hydrolytic and oxidative stability. The chelating agent is preferably a hydroxycarboxylic acid having the general formula I
wherein R is CH20H, CHO or C02H, n is from 4 to 8 and m is from 3 to n, or a salt, lactone, ether, acid ester or boric ester thereof. Bleach and laundry compositions containing the complex are also disclosed.
一种用作过氧漂白催化剂的漂白助剂,由
铁的
水溶性络合物和多齿配位体形成的
螯合剂组成,具有确定的漂白催化活性、
水解稳定性和氧化稳定性。
螯合剂最好是羟基
羧酸,其通式为 I
其中 R 是 CH20H、CHO 或 C02H,n 是 4 至 8,m 是 3 至 n,或其盐、内酯、醚、酸酯或
硼酸酯。此外,还公开了含有该复合物的漂白剂和洗衣组合物。