Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1989-08-10
1991-01-08
Albrecht, Dennis
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
210638, 210749, 210912, 252117, 252180, 25218625, 25218631, 252527, 252546, 252DIG11, 25218629, 424 62, C01B 15037, C02F 512, C11D 333, C07C22926
Patent
active
049833154
ABSTRACT:
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.
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Glogowski Mark W.
Hartman Frederick A.
Heinzman Stephen W.
Perkins Christopher M.
Albrecht Dennis
Johnson Lars S.
The Procter & Gamble & Company
Witte Richard C.
Yetter Jerry J.
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