Silicone coated light-emitting diode
A silicone protective coating for an electronic light source and a method for applying the coating over an exposed or outer surface of the electronic light source assembled as part of or mounted to a circuit board or other substrate.
1. A method of making a coated electronic light source, the method comprising:
providing an electronic light source mounted on a printed circuit board, wherein the electronic light source comprises a lens having an outer surface; and
applying a coating comprising silicone to the printed circuit board having the electronic light source mounted thereon to form a sealed protective barrier.
2. The method according to claim 1 , wherein the electronic light source is a light-emitting diode or an organic light-emitting diode.
3. The method according to claim 1 , wherein the coating is applied by spray coating.
4. The method according to claim 3 , wherein the spray coating conforms to the surface of the light-emitting diode.
5. The method according to claim 3 , further comprising spraying the coating with an air-assisted airless system or a bead and air swirl system.
6. The method according to claim 1 , wherein the coating covers the lens.
7. The method according to claim 1 , wherein the coating comprises at least 60 weight % silicone.
8. The method according to claim 7 , wherein the coating further comprises from 0 to 40 weight % of diisopropoxy di(ethoxyacetoacetyl) titanate, alkoxysilane reaction product, methyl alcohol, or a combination thereof.
9. The method according to claim 1 , wherein the coating comprises at least 99 weight % silicone.
10. The method according to claim 9 , wherein the coating further comprises from 0 to 1 weight % of diisopropoxy di(ethoxyacetoacetyl) titanate, alkoxysilane reaction product, methyl alcohol, or a combination thereof.
11. The method according to claim 1 , further comprising curing the silicone coated light-emitting diode.
12. The method according to claim 11 , wherein curing is with radiant heat.
13. The method according to claim 11 , wherein curing is in a forced air oven.
14. The method according to claim 1 , wherein the coating is transparent.