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US 4,228,300 AGranted
Polycarboxylate ethers
AssigneeMonsanto Company
InventorKent P. Lannert
Life of this patent
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Abstract
Compounds having the formula ##STR1## wherein M is an alkali metal or ammonium, R.sub.1 and R.sub.2 are hydrogen, methyl or ethyl and R.sub.3 is hydrogen, methyl, ethyl or COOM are useful sequestrants and detergency builders. Lower alkyl esters and acids of such compounds are useful intermediates for their production.
Claims10
Compounds having the formula ##STR9## wherein R is selected from the group consisting of hydrogen, methyl, ethyl, alkali metal and ammonium;
- R.sub.1 and R.sub.2 are selected from the group consisting of hydrogen, methyl, and ethyl;
- and R.sub.3 is selected from the group consisting of hydrogen, methyl, ethyl and COOR.
Dependencies are inferred from the claim text.