04983315 is referenced by 44 patents and cites 20 patents.

Disclosed are the N,N'-(1-oxo-1,2-ethanediyl)-bisaspartates comprising the moiety ##STR1## 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.

Title
N,N-(1-oxo-1,2-ethanediyl)-bis(aspartic acid), salts and use in detergent compositions
Application Number
7/392168
Publication Number
4983315
Application Date
August 10, 1989
Publication Date
January 8, 1991
Inventor
Christopher M Perkins
Cincinnati
OH, US
Stephen W Heinzman
Cincinnati
OH, US
Frederick A Hartman
Cincinnati
OH, US
Mark W Glogowski
Cincinnati
OH, US
Agent
Richard C Witte
Jerry J Yetter
Lars S Johnson
Assignee
The Procter & Gamble Company
OH, US
IPC
C07C 229/26
C11D 3/33
C02F 5/12
C01B 15/037
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