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US 5,331,100 AGranted
Self-building detergents
AssigneeDowbrands L.P.
InventorsHarry A. Smith, Donald A. Tomalia
Life of this patent
Estimating the term…
Abstract
Self-building laundry detergents are organic polyamine amides, which contain a plurality of carboxylate radicals and an amide ester. These compounds are useful individually as detergents or as components in detergent compositions.
Claims10
A process for the preparation of a carboxylated polyamine amide having one secondary amide comprising
- (A) contacting a carboxylic acid and a polyamine, the polyamine of the formula ##STR6## in which R.sup.4 is independently a divalent organic radical having from 2 to 15 carbon atoms and n is from 1 to 99, under conditions sufficient to form water and a polyamine amide having one secondary amide;
- (B) removing at least a portion of the water formed in Step A;
- and
- (C) contacting the dewatered product with an unsaturated ester to substitute all remaining amino hydrogen atoms with alkyl carboxylate substituents thereby forming the carboxylated polyamine amide having one secondary amide.
1 more element
Dependencies are inferred from the claim text.