N, N'-(1-oxo-1,2-ethanediyl)-bis (aspartic acid), salts and use in detergent compositions
申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP0412697A2
公开(公告)日:1991-02-13
Disclosed are the N,N′-(1-oxo-1,2-ethanediyl)-bisaspartates, methods for their preparation (including an unexpected preparation from glyoxal bisulfite and aspartic acid in concentrated aqueous alkaline media) and useful compositions containing the same; illustrative are general-purpose sequestrant compositions, chelating agent compositions for transition metals such as iron,manganese and copper, general-purpose laundry detergent compositions and detergent compositions comprising perborate bleach, a bleach activator and, as a bleach stabilizer/performance enhancer, the novel bisaspartates. These unique nonphosphorus compounds are useful at low levels and differ from traditional -N-C-C-N- chelating agents such as ethylenediaminetetraacetates by the presence of one amino- and one amido- functional group which it is believed will provide additional advantages, such as improved biodegradation.
本发明公开了N,N′-(1-氧代-1,2-乙二基)-双天冬氨酸盐、其制备方法(包括在浓碱性水介质中用亚硫酸乙二醛和天冬氨酸制备的一种意想不到的方法)以及含有这些物质的有用组合物;例如,通用螯合剂组合物,用于铁、锰和铜等过渡金属的螯合剂组合物,通用洗衣粉组合物,以及包含过硼酸盐漂白剂、漂白活化剂和作为漂白稳定剂/性能增强剂的新型双天冬氨酸盐的洗涤剂组合物。这些独特的无磷化合物在低浓度下就能发挥作用,而且与传统的-N-C-C-N-螯合剂(如乙二胺四乙酸盐)不同,它们含有一个氨基和一个酰胺官能团,相信这将带来更多的优势,如改善生物降解。