Optically transparent UV-protective coatings
First Claim
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1. A method of preparing an optically transparent ultraviolet resistant coating composition comprising the steps of:
- a. at least partially hydrolyzing an alkoxide of the general formula RxM(OR′
)z−
x wherein R is an organic radical, M is selected from the group consisting of silicon, aluminum, titanium, zirconium and mixtures thereof, R′
is a low molecular weight alkyl radical, z is the valence of M, and x is less than z and may be zero except when M is silicon; and
b. adding to said at least partially hydrolyzed alkoxide a reaction product of tetraalkylsilicate and cerium oxide.
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Abstract
An ultraviolet radiation resistant coating is disclosed comprising cerium oxide in an inorganic oxide matrix formed by the hydrolysis and condensation of an organoalkoxysilanie and/or other metal alkoxide in combination with the reaction product of cerium oxide and tetraalkylsilicate.
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Citations
12 Claims
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1. A method of preparing an optically transparent ultraviolet resistant coating composition comprising the steps of:
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a. at least partially hydrolyzing an alkoxide of the general formula RxM(OR′
)z−
x wherein R is an organic radical, M is selected from the group consisting of silicon, aluminum, titanium, zirconium and mixtures thereof, R′
is a low molecular weight alkyl radical, z is the valence of M, and x is less than z and may be zero except when M is silicon; and
b. adding to said at least partially hydrolyzed alkoxide a reaction product of tetraalkylsilicate and cerium oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12)
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11. A method of preparing an optically transparent ultraviolet resistant coating composition comprising the steps of:
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a. at least partially hydrolyzing an alkoxide of the general formula RxM(OR′
)z−
x wherein R is an organic radical, M is selected from the group consisting of silicon, aluminum, titanium, zirconium and mixtures thereof, R′
is a low molecular weight alkyl radical, z is the valence of M, and x is less than z and may be zero except when M is silicon; and
b. adding to said at least partially hydrolyzed alkoxide a reaction product of tetraalkylsilicate and cerium oxide formed from combining tetraalkylsilicate and cerium oxide, increasing the pH, and adding water.
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Specification