Phase separated self-healing polymer coatings
AssigneeNEI Corporation
InventorsRunqing Ou, Kenneth Eberts, Ganesh Skandan
Life of this patent
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Abstract
Phase separated self-healing polymer coatings having a “biphasic” thermoset/thermoplastic morphology to achieve self-healing. The biphasic structure has: (i) a major “load-bearing” thermoset phase that has superior strength and performs major mechanical and structural functions, and (ii) 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.
Claims12
A self healing polymer coating comprising:
- a) polyurethane thermoset resin;
- b) polycaprolactone (PCL) thermoplastic present as sub-micron generally spherical particles formed in situ by phase separation via reaction and dispersed in a matrix of the thermoset resin;
- and
- c) the thermoplastic and thermoset forming a transparent structure wherein the thermoset is a load-bearing phase performing major mechanical and structural functions and wherein the thermoplastic serves as a self-healing phase to repair cracks and other damages in the material to restore its mechanical and structural integrity after damage, wherein the polyurethane comprises 80-90 wt. % and the PCL is 10 to 20 wt. %.
A self healing polymer coating comprising:
- a) a thermoset resin;
- b) a thermoplastic present as sub-micron generally spherical particles formed in situ by phase separation via reaction and dispersed in a matrix of the thermoset resin;
- c) a nanoparticle additive of PCL grafted alumina for reinforcing the mechanical properties of the coating;
- and
- d) the thermoplastic and thermoset forming a transparent structure wherein the thermoset is a load-bearing phase performing major mechanical and structural functions and wherein the thermoplastic serves as a self-healing phase to repair cracks and other damages in the material to restore its mechanical and structural integrity after damage, wherein the thermoset comprises 80-90 wt. % and the thermoplastic is 10 to 20 wt. %.
Dependencies are inferred from the claim text.