N,n'-(1-oxo-1,2-ethanediyl)-bis-(aspartic acid), salts and...

Details N,n'-(1-oxo-1,2-ethanediyl)-bis-(aspartic acid), salts and... N,n'-(1-oxo-1,2-ethanediyl)-bis-(aspartic acid), salts and...

C - Chemistry, Metallurgy

07

C

8/87, 260/522.3,

C07C 237/12 (2006.01) C07K 5/02 (2006.01) C07K 5/06 (2006.01) C11D 1/86 (2006.01) C11D 3/26 (2006.01) C11D 3/33 (2006.01) C11D 3/39 (2006.01)

Patent

CA 2022874

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.

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