Schott Ag

Denise Trapp

Stephan Tratzky

A process for producing a wipe-proof anti-reflection layer on a borosilicate glass body is described, in which the borosilicate glass body is coated with a coating solution having a composition of 1-6% by weight of HCl, 0.5-7% by weight of SiOsol (solids content), 0.5-5% by weight of HO, and 85-98% by weight of a readily volatile water-soluble organic solvent. The borosilicate glass body that is to be coated contains, in % by weight based on oxide content: 63-76 of SiO, &#x3e;11-20 of BO, 1-9 of AlO, 3-12 of alkali metal oxide(s), 0-10 of alkaline earth metal oxide(s), 0-2 of ZnO, 0-5 of TiO, 0-1 of ZrO, 0-1 of NbO, and 0-1 of WO.

Process for producing a wipe-proof antireflection layer on a borosilicate glass body

In the method of making an adherent and wipe-resistant porous SiO-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 SiOsol 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 SiO, 70 to 75; BO, 8 to 11; AlO, 5 to 9; alkali metal oxides, 7 to 12; and alkaline earth metal oxides, 0 to 10.

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Mitterteich, Germany

Denise Trapp