Method of producing ambient curing sprayable transparent smart quasi-ceramic coating
A liquid silicone-based composition for forming a coating, the composition comprising a silazane, an organometallic compound, an alkoxysilane, and an aprotic solvent, wherein when applied to a substrate the liquid composition cures to form a quasi-ceramic coating under ambient conditions.
1. A liquid silicone-based composition for forming a coating, the composition comprising:
a silazane;
an organometallic compound, wherein the organometallic compound comprises zirconium tert-butoxide, tantalum ethoxide, silver neodecanoate, titanium butoxide, tungsten ethoxide, aluminum-tri-sec-butoxide or combinations thereof;
an alkoxysilane; and
an aprotic solvent,
wherein when applied to a substrate the liquid composition cures to form a quasi-ceramic coating under ambient conditions.
2. The composition of claim 1 , wherein the silazane comprises an organopolysilazane.
3. The composition of claim 1 , wherein the alkoxysilane comprises 3-aminopropyltrimethoxysilane, glycodioxypropyltrimethoxysilane, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1H,1H,2H,2H-perfluorodecyltrimethoxysilane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, octadecyldimethyl (3-trimethoxy silylpropyl) ammonium chloride, N-(2-aminoethyl)3-aminopropyl-trimethoxysilane, N-(2-aminoethyl)3-aminopropyl-triethoxysilane, or combinations thereof.
4. The composition of claim 1 , wherein the solvent comprises hexamethyldisiloxane, hexamethylcyclotrisiloxane, octamethyltrisiloxane, octamethylcyclotetrasiloxane, decamethyltetrasiloxane, decamethylcyclopentasiloxane, dodecamethylpentasiloxane, dodecamethylcyclohexasiloxane, tetradecamethylhexasiloxane, t-butyl acetate, n-butyl acetate, ethyl acetate, xylene, petroleum benzene, dipropylene glycol dimethyl ether, dipropylene glycol dibutyl ether, 1-methoxy-2-propyl acetate, 2-butoxyethyl acetate, 2-(2-butoxyethoxy) ethyl acetate, naphtha, dibutylether, or combinations thereof.
5. The composition of claim 1 , wherein the silazane comprises organopolysilazane, the organometallic compound comprises zirconium tert-butoxide and tantalum ethoxide, the silane comprises glycodioxypropyltrimethoxysilane, and the solvent comprises hexamethyldisiloxane.
6. The composition of claim 1 further comprising an organic filler, an inorganic filler, a silsesquioxane, or combinations thereof.
7. A method of preparing the liquid silicone-based composition of claim 1 , comprising:
admixing in the aprotic solvent, the silazane and the organometallic compound, thereby providing a first solution; and
admixing the first solution with the alkoxysilane, thereby providing the liquid silicone-based composition.
8. The method of claim 7 , wherein the silazane comprises an organopolysilazane.
9. The method of claim 7 , wherein the alkoxysilane comprises 3-aminopropyltrimethoxysilane, glycodioxypropyltrimethoxysilane, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1H,1H,2H,2H-perfluorodecyltrimethoxysilane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, octadecyldimethyl (3-trimethoxy silylpropyl) ammonium chloride, N-(2-aminoethyl)3-aminopropyl-trimethoxysilane, N-(2-aminoethyl)3-aminopropyl-triethoxysilane, or combinations thereof.
10. The method of claim 7 , wherein the solvent comprises hexamethyldisiloxane, hexamethylcyclotrisiloxane, octamethyltrisiloxane, octamethylcyclotetrasiloxane, decamethyltetrasiloxane, decamethylcyclopentasiloxane, dodecamethylpentasiloxane, dodecamethylcyclohexasiloxane, tetradecamethylhexasiloxane, t-butyl acetate, n-butyl acetate, ethyl acetate, xylene, petroleum benzene, dipropylene glycol dimethyl ether, dipropylene glycol dibutyl ether, 1-methoxy-2-propyl acetate, 2-butoxyethyl acetate, 2-(2-butoxyethoxy) ethyl acetate, naphtha, dibutylether, or combinations thereof.
11. The method of claim 7 , wherein the silazane comprises organopolysilazane, the organometallic compound comprises zirconium tert-butoxide and tantalum ethoxide, the silane comprises glycodioxypropyltrimethoxysilane, and the solvent comprises hexamethyldisiloxane.
12. The method of claim 7 , further comprising admixing with the liquid silicone-based composition a solution of a second alkoxysilane.
13. The method of claim 12 , wherein the second alkoxysilane comprises 3-aminopropyltrimethoxysilane, glycodioxypropyltrimethoxysilane, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1H,1H,2H,2H-perfluorodecyltrimethoxysilane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, octadecyldimethyl (3-trimethoxy silylpropyl) ammonium chloride, N-(2-aminoethyl)3-aminopropyl-trimethoxysilane, N-(2-aminoethyl)3-aminopropyl-triethoxysilane or combinations thereof.
14. The method of claim 7 , further comprising admixing with the liquid silicone-based composition a second organometallic compound.
15. The method of claim 14 , wherein the second organometallic compound comprises zirconium tert-butoxide, tantalum ethoxide, silver neodecanoate, titanium butoxide, tungsten ethoxide, aluminum-tri-sec-butoxide or combinations thereof.
16. The method of claim 7 , further comprising admixing with the liquid silicone-based composition an organic filler, an inorganic filler, a silsesquioxane, or combinations thereof.
17. The method of claim 7 , wherein the aprotic solvent comprises a mixture of two or more aprotic solvents.
18. The composition of claim 1 , wherein the alkoxyxilane comprises one or more of a C 1 -C 10 alkoxide, a C 1 -C 30 alkyl, a C 1 -C 30 fluoroalkyl, a C 1 -C 30 alkyl amine, a C 1 -C 30 dialkyl amine, a C 1 -C 30 trialkyl amine, and a C 1 -C 30 tetraalkyl ammonium.
19. A liquid silicone-based composition for forming a coating, the composition comprising:
a silazane;
an organometallic compound;
an alkoxysilane, wherein the alkoxysilane comprises 3-aminopropyltrimethoxysilane, glycodioxypropyltrimethoxysilane, 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1H,1H,2H,2H-perfluorodecyltrimethoxysilane, 1H,1H,2H,2H-perfluorodecyltriethoxysilane, octadecyldimethyl (3-trimethoxy silylpropyl) ammonium chloride, N-(2-aminoethyl)3-aminopropyl-trimethoxysilane, N-(2-aminoethyl)3-aminopropyl-triethoxysilane, or combinations thereof; and
an aprotic solvent,
wherein when applied to a substrate the liquid composition cures to form a quasi-ceramic coating under ambient conditions.
20. The composition of claim 19 , wherein the organometallic compound comprises Zr, Ta, Ag, W, Al, Ti, Cu, Ce, La, or combinations thereof.
21. A method of preparing the liquid silicone-based composition of claim 19 , comprising:
admixing in the aprotic solvent, the silazane and the organometallic compound, thereby providing a first solution; and
admixing the first solution with the alkoxysilane, thereby providing the liquid silicone-based composition.
22. The method of claim 21 , wherein the organometallic compound comprises Zr, Ta, Ag, W, Al, Ti, Cu, Ce, La or combinations thereof.
23. A method of coating a substrate, comprising:
depositing on said substrate the liquid silicone-based coating composition of claim 1 .
24. A method of coating a substrate, comprising depositing on said substrate the liquid silicone-based coating composition of claim 19 .