Eugenol side group-containing polyurethane coating as well as preparation method and application thereof

The invention discloses a polyurethane coating containing eugenol side groups as well as a preparation method and application of the polyurethane coating. The preparation method comprises the following steps: reacting aliphatic lactone, dihydric alcohol and a first catalyst to obtain aliphatic polyester dihydric alcohol; the preparation method comprises the following steps: reacting eugenol, a mercapto alcohol compound and a photoinitiator to obtain eugenol polyol; the preparation method comprises the following steps: dissolving aliphatic polyester glycol, eugenol polyol, diisocyanate, a chain extender and a second catalyst in a first solvent for reaction, dropwise adding the mixture into a second solvent after the reaction is finished to obtain polyurethane containing eugenol side groups, dissolving the polyurethane containing eugenol side groups in a third solvent, and carrying out a solution casting method to obtain the polyurethane containing eugenol side groups. The polyurethane coating containing the eu