Coating composition and novel complexer therefor

Abstract

A novel complexer for use in aqueous coating compositions formed from acidic resins, as well as the coating compositions, are described. The complexer is formed from a metal having a coordination value in excess of its valence and a polyalkylene polyamine along with, optionally, organic acids and cometals. The acidic resin, partially neutralized with ammonia, is added to the formed complexer to form the coating composition, a coordinate, which, upon drying, provides films which are water resistant and have excellent wet rub resistance. The coating compositions are particularly useful for inks, including gravure and flexographic inks.

I claim: 
     
       1. A metal amine complexer, contained in an aqueous solution, consisting essentially of: a. zinc;   b. from 0.9 to 6 moles, per mole of the metal, of a polyalkylene polyamine having the formula:   NH.sub.2 [(CHR).sub.a NH].sub.n H,     where a is from 2 to 3, n is from 2 to 5, and .[.each.]. R is selected from the group consisting of hydrogen and methyl; and     c. at lest one aliphatic, monocarboxylic acid having from six to 18 carbon atoms.   
     
     
       2. The metal amine complexer of claim 1 having, in addition to zinc, a co-metal selected from the class consisting of alkali and alkaline earth metals. 
     
     
       3. The metal amine complexer of claim 2 wherein the co-metal is barium. 
     
     
       4. The metal amine complexer of claim 2 wherein the co-metal is magnesium. 
     
     
       5. The metal amine complexer of claim 1 wherein at least one of the aliphatic, monocarboxylic acids has from eight to 14 carbon atoms. 
     
     
       6. The metal amine complexer of claim 5 wherein at least one of the aliphatic, monocarboxylic acids has from 12 to 14 carbon atoms. 
     
     
       7. The complexer of claim 6 wherein the monobasic acid is lauric acid.