Self-healing hard coatings
View Patent ↗A method is presented herein that involves mixing a self-healing coating solution, a dispersion of colloidal nanoparticles, and at least one of a solvent or a surfactant, to obtain a composition, wherein the composition is capable of being cured into a coating that is transparent to visible light. An ophthalmic lens product obtained by this method is also presented herein.
1. A method comprising the steps of:
mixing:
a self-healing coating solution;
at least one of POSS or a POSS derivative;
a dispersion of colloidal nanoparticles; and
at least one of a solvent or a surfactant; and
obtaining a composition, wherein the composition is capable of being cured into a coating that is transparent to visible light.
2. The method of claim 1 , wherein the dispersion of colloidal nanoparticles comprises at least one of Sb 2 O 3 , SnO 2 , ITO, ATO (SnO 2 /Sb 2 O 5 ), PTO (SnO 2 /P 2 O 5 ), TiO 2 , ZnO, Al 2 O 3 , Au, Ag, or Cu.
3. The method of claim 2 , wherein the dispersion of colloidal nanoparticles comprises a solid percentage of Sb 2 O 3 nanoparticles in a dry coating formed from the composition in the range of about 2.0 wt % to about 11.0 wt %.
4. The method of claim 3 , wherein the dispersion of colloidal nanoparticles comprises a solid percentage of Sb 2 O 3 nanoparticles in a dry coating formed from the composition in the range of about 5.0 wt % to about 8.5 wt %.
5. The method of claim 2 , wherein the dispersion of colloidal nanoparticles comprises a solid percentage of SnO 2 nanoparticle in a dry coating formed from the composition in the range of about 1.1 wt % to about 5.1 wt %.
6. The method of claim 5 , wherein the dispersion of colloidal nanoparticles comprises a solid percentage of SnO 2 nanoparticle in a dry coating formed from the composition in the range of about 2.0 wt % to about 4.0 wt %.
7. The method of claim 2 , wherein the dispersion of colloidal nanoparticles comprises as a solid percentage in a dry coating formed from the composition:
Sb 2 O 3 nanoparticles, in the range of about 2.0 wt % to about 11.0 wt %; and
POSS-polyol, in the range of about 1.0 wt % to about 6.0 wt %.
8. The method of claim 7 , wherein the dispersion of colloidal nanoparticles comprises as a solid percentage in a dry coating formed from the composition:
Sb 2 O 3 nanoparticles, in the range of about 5.0 wt % to about 8.5 wt %; and
POSS-polyol, in the range of about 1.5 wt % to about 3.5 wt %.
9. The method of claim 1 , wherein a POSS derivative further defined as a POSS-diol, POSS-triol, or POSS-polyol, is mixed into the solution.
10. The method of claim 9 , wherein the solid percentage of POSS-polyol in a dry coating formed from the composition is in the range of about 1.0 wt % to about 6.0 wt %.
11. The method of claim 10 , wherein the solid percentage of POSS-polyol in a dry coating formed from the composition is in the range of about 1.5 wt % to about 3.5 wt %.
12. The method of claim 1 , wherein a POSS derivative further defined as a POSS-dithiol, POSS-trithiol, or POSS-polythiol, is mixed into the solution.
13. The method of claim 1 , wherein the self-healing coating solution is a composition comprising at least two polycarbonate polyols and at least one blocked isocyanate.
14. The method of claim 1 , wherein the method further comprises coating an ophthalmic lens with the composition.