| abstract |
An adhesive bonding primer composition containing a water-dispersible, modified epoxy resin and a water-dispersible corrosion inhibitor mixture of components I. and II. in which: Component I. is at least one, but not more than two of: (a.) a zinc salt of a carboxylic acid of the formula: <IMAGE> (b.) zinc phosphate, and (c.) zinc molybdate, wherein Y4 is hydroxyl or a radical of the formula: <IMAGE> (B) or <IMAGE> (C) Y3 is -CO- or -SO2-, Y1 is C1-C8-alkyl, C1-C8-alkoxy or halogen when Y4 is other than hydroxyl, carboxyl when Y4 is hydroxyl, or hydrogen when Y4 is <IMAGE> (C) or Q1 is nitro, or m is 2, Y2 is hydrogen, C1-C8-alkyl, nitro, hydrogen or halogen, Q1 is hydrogen, nitro or halogen, m and n are each 1 or 2; and Component II. is at least one other and different corrosion inhibitor from the group consisting of: i) (2-benzothiazolylthio)succinic acid, and ii) a corrosion inhibitor containing a metal other than chromium, having an atomic number of at least 3 and not greater than 81, from Groups 1, 2, 3, 4, 5, 6, 7 and 12 of the Periodic Table of the Elements (New Notation), and mixtures thereof. The mixtures of components I. and II. inhibit the corrosion of the water-dispersible, modified epoxy resin adhesive primer. |