Loading patent…
AssigneeSchott AG
InventorsDenise Trapp, Stephan Tratzky
Estimating the term…
In the method of making an adherent and wipe-resistant porous SiO2-containing antireflection coating on a borosilicate glass body a coating solution containing from 1.0 to 6.0 wt. % of HCl, from 0.5 to 7.0 wt. % of a SiO2 sol based on solids content, from 0.5 to 5.0 wt. % of water, and from 85 to 98 wt. % of at least one volatile water-soluble organic solvent, is used to form an antireflection coating on the glass body. A glass body, on which the foregoing coating can be provided with good adherence and wipe resistance properties, is made of borosilicate glass having a composition, in percent by weight based on oxide content, of SiO2, 70 to 75; B2O3, 8 to 11; Al2O3, 5 to 9; alkali metal oxides, 7 to 12; and alkaline earth metal oxides, 0 to 10.
A method of making adherent and wipe-resistant porous SiO2-containing antireflection coatings on borosilicate glass bodies, said method comprising the steps of:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Anti-reflection coatings: using inorganic layer materials only
General methods for coating; Devices therefor: for hollow ware, e.g. containers
With materials of composite character: containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase
Oxides: by deposition from the liquid phase
About 10 months of term left · ends 30 Aug 2027 (estimated)
German Patent Application DE 10 2006 041 469.1-45, filed Sep. 2, 2006 in Germany, describes substantially the same invention as described herein below and claimed in the claims appended herein below and provides the basis for a claim of priority for the instant invention under 35 U.S.C. 119(a)-(d). The disclosure in the foregoing German Patent Application DE 10 2006 041 469.1-45 is hereby incorporated herein by explicit reference thereto.
1. The Field of the Invention
The subject matter of the present invention is a method of making an adherent and wipe-resistant porous SiO2-containing antireflection coating on a borosilicate glass body and a coating solution that is suitable for making the wipe-resistant antireflection coating.
According to the present invention this object is attained by a method in which a borosilicate glass body with a composition, in percent by weight based on oxide content, of SiO2, 70 to 75; B2O3, 8 to 11; Al2O3, 5 to 9; alkali metal oxides, 7 to 12; and alkaline earth metal oxides, 0 to 10, is wet with a solution containing:
HCl 1.0 to 6.0 wt. % SiO2 Sol 0.5 to 7.0 wt. % (solids content) Water 0.5 to 5.0 wt. % Volatile water-soluble 85 to 98 wt. %. organic solvent
The HCl content acts as an acid to stabilize the SiO2 sol in a known manner. The SiO2 sol (Kiesel sol) can be made according to known methods, e.g. by treating an aqueous alkali silicate solution with an ion exchanger. Kiesel sol is an aqueous solution of colloidal amorphous SiO2. The Kiesel sol obtained commercially usually contains from 30 to 60 wt. % SiO2. The average particle diameter is from 5 to 150 nm.