phase separated self - healing polymeric wood coatings having a “ biphasic ” thermoset / thermoplastic morphology to achieve self - healing . the biphasic structure has : a major “ load - bearing ” thermoset phase that has superior strength and performs major mechanical and structural functions , and a “ self - healing ” phase of a thermoplastic healing agent to repair the material and restore its mechanical and structural integrity after being damaged . the phase - separated morphology is achieved through phase separation via a reaction process . methodologies for achieving the above mentioned “ biphasic ” structure in solvent borne thermally cured resin , waterborne resin , and solvent borne uv - curable resin are described .