Accession Number : ADD013288

Title :   Repellent Coatings for Optical Surfaces.

Descriptive Note : Patent, Filed 22 Feb 82, patented 18 Oct 83,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Richter, Herbert P ; Dibble, Eugene J

Report Date : 18 Oct 1983

Pagination or Media Count : 5

Abstract : Water repellant coatings for optical elements such as lenses and windshields are disclosed. 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.

Descriptors :   *PATENTS, *WATER REPELLENTS, *PROTECTIVE COATINGS, *OPTICAL COATINGS, LENSES, WINDSHIELDS, OPTICAL GLASS, MAGNESIUM COMPOUNDS, ANTIREFLECTION COATINGS, INTERFACES, HYDROLYSIS, CONDENSATION, INDIUM COMPOUNDS, TIN COMPOUNDS, OXIDES, SILANES, POLYMERIC FILMS, CARBOXYLIC ACIDS

Subject Categories : Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE