Treatment of aluminum flake pigment for use in organic coating compositions

Claim 1

A composition, comprising a metal surface modified with at least one compound; wherein the compound is of the formula: ##STR12## wherein A 1 , A 2 , A 3 , and A 4 are each independently hydroxy, alkyl of one to ten carbon atoms, alkoxy of one to ten carbon atoms, alkoxyalkoxy of two to ten carbon atoms, alkanoyloxy of two to ten carbon atoms, or halogen, with the proviso that A 1 , A 2 , and A 3 may not all be alkyl; R 1 is a divalent radical selected from straight or branched alkylenes of one to twelve carbon atoms; D 1 is either a divalent radical selected from the group consisting of --O--, --NA 5 --, and --S--, or a trivalent radical of the formula ##STR13## wherein A 5 , A 6 , A 7 and A 8 are each independently hydrogen or alkyl of one to twelve carbon atoms; R 2 is hydrogen or a covalent bond with D 1 , with the proviso that R 2 is only a covalent bond with D 1 when D 1 is a trivalent radical; R 3 is a polymeric backbone; D 2 and D 3 are divalent radicals, each independently --O-- or --NA 9 --, wherein A 9 is hydrogen or alkyl of one to twelve carbon atoms; R 4 is a divalent radical selected from straight or branched alkylenes of three to thirty carbon atoms; R 5 is hydrogen or a mixture of hydrogen and alkyl of one to eight carbon atoms; R 6 is an alkyl of one to thirty carbon atoms; m and n are integers, each independently being one to one thousand, and j and k are integers, each independently being one to fifty.