Aqueous coating composition and process of making the same

An aqueous coating composition comprising, based on the total weight of the aqueous coating composition,

• (a) an aqueous polymer dispersion present in an amount of from 18% to 31% by solids weight, wherein the polymer comprises at least 95% by solids weight of an acrylic emulsion copolymer based on the solids weight of the polymer;
• (b) anionic colloidal silica present in an amount of from 1.5% to 11% by solids weight, wherein silica particles in the anionic colloidal silica have a specific surface area of from 80 to 500 m2/g;
• (c) a solvent present in an amount of from 1% to 4% by weight, wherein the solvent has at least one hydroxyl group and a dielectric constant at 25° C. of from 7 to 10.3, and is at least one of diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, triethylene glycol monobutyl ether, dipropylene glycol n-butyl ether, propylene glycol n-butyl ether, dipropylene glycol n-propyl ether, propylene glycol n-propyl ether, or diethylene glycol monomethyl ether;
• (d) a monoamine compound present in an amount of from 0.7% to 1% by weight, wherein the monoamine is selected from an alkyl monoamine, a beta-hydroxyl monoamine containing up to 2 hydroxyl groups, or mixtures thereof;
• and
• (e) water;
• wherein the aqueous coating composition is substantially free of silane coupling agents.