| abstract |
Esters and anhydrides of aliphatic or cycloaliphatic mono-, di-, tri- or tetracarboxylic acids which are substituted in the (cyclo) aliphatic radical by a group of the formula wherein X is oxygen, sulfur or NH and each R is independently hydrogen, alkyl, haloalkyl, alkoxy, alkylthio. Alkylsulfonyl, cycloalkyl, phenyl, alkylphenyl, phenylalkyl, halogen, -CN, -NO 2 , -COOH, - COOalkyl or a tertiary amino group or a carbamoyl group, or of non-toxic salts of those compounds which contain - COOH, are effective corrosion inhibitors for paints and other aqueous systems that are in contact with metals. |