Epoxy resin compositions and coating systems

A composition comprising an epoxy polymerization product of a reaction mixture, the reaction mixture comprising:

• from about 25 wt % to about 99 wt % of a cycloaliphatic epoxy resin;
• a curing agent comprising an aliphatic polyamine, a polyetheramine, a cycloaliphatic amine, an aromatic amine, a Mannich base, a ketimine, an oxazoline, an amidoamine, or combinations thereof;
• and
• an acetoacetoxy-functionalized polymer having a weight average molecular weight of about 5,000 g/mol to about 100,000 g/mol, the acetoacetoxy-functionalized polymer comprising:
• acetoacetoxy-functionalized monomer units;
• and
• co-monomer units comprising an acrylate monomer monomer, a methacrylate monomer, an alpha-olefin monomer, a vinyl halide monomer, a diester of a carboxylic acid monomer, an unsaturated nitrile monomer, an alpha, beta-unsaturated carboxylic acid monomer, an alpha, beta-unsaturated amide monomer, or combinations thereof.

A coating system, comprising:

• a first component, comprising:
• from about 25 wt % to about 99 wt % of the coating system of a cycloaliphatic epoxy resin;
• and
• an acetoacetoxy-functionalized polymer having a molecular weight of about 5,000 g/mol to about 100,000 g/mol, the acetoacetoxy-functionalized polymer comprising:
• acetoacetoxy-functionalized monomer units;
• and
• co-monomer units comprising an acrylate monomer, a methacrylate, an alpha-olefin, a vinyl halide monomer, a diester of a carboxylic acid monomer, an unsaturated nitrile monomer, an alpha, beta-unsaturated carboxylic acid monomer, an alpha, beta-unsaturated amide monomer, or combinations thereof;
• and
• a second component comprising a curing agent comprising an aliphatic polyamine, a polyetheramine, a cycloaliphatic amine, an aromatic amine, a Mannich base, a ketimine, an oxazoline, an amidoamine, or combinations thereof.