| 摘要 |
PURPOSE:To provide an anticorrosive having high stability to hard water and superior rust preventing power and forming hardly bubbles by using one or more kinds of reaction products each prepd. by reacting a compound having a succinic anhydride group in the molecule with a salt of alpha-amino acid. CONSTITUTION:A compound having a succinic anhydride group in the molecule is reacted with a salt of alpha-amino acid such as the Na salt of glycine at about 70-95 deg.C in water or a mixture of water with other solvent to prepare a compound (imidocarboxylate) represented by formula I or a compound (amidocarboxylate) represented by formula II. Maleopimaric acid, a styrene-maleic anhydride copolymer or the like is used as said compound having a succinic anhydride group. The desired anticorrosive having stability to hard water can be provided by using one or more kinds of compounds selected among the compounds represented by the formula I , II. |
