Repellent coatings for optical surfaces
First Claim
1. A method for applying a water repellent coating to a surface of an optical element comprising:
- applying fluid comprising a composition selected from the group consisting of chloromethylsilanes, a mixture of aminofunctional polydimethylsiloxane copolymers, and a mixture of a perfluorocarboxylic acid and N,beta-aminoethyl-gamma-aminopropyltrimethoxysilane to said surface of said optical element; and
allowing said composition to react at said surface of said optical element to form said repellent coating thereon.
1 Assignment
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Accused Products
Abstract
Water repellent coatings for optical elements such as lenses and windshields. Coatings for uncoated glass, glass having a magnesium fluoride antireflective coating, and glass having an electrically conductive coating of a mixture of indium oxides and tin oxides are applied by applying compositions containing chloromethylsilanes, Dow Corning 531 and 536 fluids, or N, beta-aminoethyl-gamma-aminopropyltrimethylsilane and a perfluorocarboxylic acid to the surface where water repellent coatings are desired. Dow Corning 531 and 536 fluids are described as aminofunctional polydimethylsiloxane copolymers. Hydrolysis and condensation reactions in the presence of water at the surface to be coated result in a durable polymeric coating bonded to the surface.
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Citations
16 Claims
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1. A method for applying a water repellent coating to a surface of an optical element comprising:
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applying fluid comprising a composition selected from the group consisting of chloromethylsilanes, a mixture of aminofunctional polydimethylsiloxane copolymers, and a mixture of a perfluorocarboxylic acid and N,beta-aminoethyl-gamma-aminopropyltrimethoxysilane to said surface of said optical element; and allowing said composition to react at said surface of said optical element to form said repellent coating thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification