Curing agent composition and curing agent coating formula thereof

A curing agent composition, comprising:

• 5 to 25 wt % of an ester group-containing amine end group adduct;
• 2 to 25 wt % of a C8-C22 hydrophobic saturated or unsaturated fatty amine;
• 2 to 25 wt % of a polyamine compound;
• 2 to 20 wt % of a silane compound;
• and
• 10 to 60 wt % of an ether solvent;
• wherein the ester group-containing amine end group adduct has a chemical formula of:
• wherein m=1-100, n=1-15, X and Y are each independently selected from H, methyl, ethyl, and hydroxymethyl;
• R1 is a C2-C18 aliphatic, cycloaliphatic, or aromatic group unsubstituted or substituted with non-reactive oxygen, or up to an average of 4 secondary or tertiary nitrogen atoms;
• R2 and R3 are each independently selected from H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or R2 and R3 are bonded to each other to form a substituted or unsubstituted ring;
• R0 is a C6-C30 hydrocarbon group having at least one aromatic ring, and substituted or unsubstituted with oxygen atom, nitrogen atom, sulfur atom, or a C6-C17 aliphatic hydrocarbon group;
• wherein the ester group-containing amine end group adduct is obtained by the following steps in a recited order:
• (a) an esterification step, wherein the esterification step is mixing a polyol and a polyanhydride at a ratio of 1.1:1 and reacting the polyol and the polyanhydride at a temperature between 110 and 130° C., thereby producing an ester-based emulsifier;
• (b) a chain extension step, wherein the chain extension step is reacting the ester-based emulsifier with a bifunctional epoxy resin in an equivalent ratio of 0.05:1 under a reaction conditions of the chain extension step are firstly reacting at a temperature of 110 to 130° C. for 1 hour, then reacting at a temperature of 130 to 150° C. for 2 hours, thereby producing a polymer intermediate;
• and
• (c) reacting the polymer intermediate and a polyamine compound with an equivalent ratio of 0.2:1 at a temperature of 70° C. for 4 hours, thereby producing the ester group-containing amine end group adduct.