Methods for forming omniphobic thermoset compositions and related articles

A method for forming an omniphobic coated article, the method comprising:

• applying to a substrate (i) at least one first thermosetting component reactive with a second thermosetting component and a functionalized omniphobic polymer and (ii) at least one second thermosetting component reactive with the first thermosetting component;
• reacting the at least one first thermosetting component with the at least one second thermosetting component (i) at temperature from 20° C. to 150° C. and (ii) for a time from 1 min to 300 min to form a partially crosslinked reaction product comprising (i) at least some covalent bonds between the first thermosetting component and the second thermosetting component, and (ii) at least some unreacted functional groups reactive with the functionalized omniphobic polymer;
• applying to the partially crosslinked reaction product a mixture comprising (i) a solvent and (ii) at least one functionalized omniphobic polymer having a glass transition temperature (Tg) of 50° C. or less, the functionalized omniphobic polymer comprising a functional group reactive with the first thermosetting component;
• after applying the functionalized omniphobic polymer to the partially crosslinked reaction product, drying the substrate to remove the solvent;
• and
• reacting the unreacted functional groups in the partially crosslinked reaction product with the functionalized omniphobic polymer to form a thermoset omniphobic coating on the substrate;
• wherein:
• a further coating is not applied to the thermoset omniphobic coating;
• the thermoset omniphobic coating has a water contact angle in a range from 90° to 120°;
• and
• the thermoset omniphobic coating has an oil contact angle in a range from 1° to 65° for hexadecane.