Patent ID: 8278396

Claim:
A curable composition comprising an epoxy resin and a curing agent for the epoxy resin that has the structure in which f 1 and f 2 independently are selected from the group consisting of hydroxyl, amine, azine, hydrazide, anhydride, imidazole or Lewis acid, provided that f 1 and f 2 are different; n and m independently are numerals from 0 to 4, provided that when n is 0, x is at least 1; x is a numeral from 0 to 100, provided that when x is 0, n is at least 1 and R 1 is f 2 ; R is a monovalent or polyvalent radical, which includes hydrocarbyl, heteroatom-containing hydrocarbyl, substituted heteroatom-containing hydrocarbyl, hydrocarbylene, substituted hydrocarbylene, heteroatom-containing hydrocarbylene, substituted heteroatom-containing hydrocarbylene, polysiloxanes, polysiloxane-polyurethane block copolymers, and combinations of any of the above linked with one or more linking groups selected from the group consisting of —S—, —O—C(O)—, —O—C(O)—O—, —O—C(O)—NR 3 —, —NR 3 —C(O)—, —NR 3 —C(O) —N═N—, and —S—C(O)—, in which R 3 is independently for each position selected from the group consisting of hydrogen, alkyl, alkylene, alkoxy, acrylate, aryl, and maleimide; R 1 and R 2 independently are selected from the group consisting of —R, —H, —CH 3 , —OCH 3 , —O(CH 2 ) n CH 3 , —(CH 2 ) n f 3 in which n is a numeral from 1 to 20 and f 3 is a hydrocarbyl group containing at least one carbon to carbon unsaturated bond; and in which R 3 independently for each position is selected from the group consisting of hydrogen, alkyl, alkylene, alkoxy, acrylate, aryl, and maleimide.