Anti-scratch coating, procedure for its production and use of same
AssigneeSchott AG
InventorsFolker Steden, Jorg Hinrich Fechner
Life of this patent
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Abstract
The invention concerns an anti-scratch coating on a substrate, comprising one or several anti-scratch means and a pH buffer system which has in a watery solution a pH value ranging from neutral to highly alkaline, especially a pH value ranging between app. 7 and app. 12, preferably a pH value ranging from neutral to slightly alkaline, in particular a pH value ranging between app. 7 and app. 9. It is also the objective of the invention to produce and use the anti-scratch coating.
Claims12
A glass substrate having a water-soluble anti-scratch coating, said coating comprising:
- a water soluble anti-scratch component;
- and
- a buffer system incorporated in solid form in said coating, said buffer system capable of releasing from said coating to provide a pH between 7 and 12 in an aqueous solution.
A method of temporarily protecting a glass substrate, comprising the steps of:
- providing a glass substrate having a water soluble anti-scratch coating, the coating including a water soluble anti-scratch component and a buffer system incorporated in solid form in the coating, the buffer system capable of releasing from the coating to provide a pH between 7 and 12 in water;
- subjecting the glass substrate to a washing process in water wherein the buffer system provides a pH between 7 and 12 and the coating is removed from the glass substrate;
- and
- removing the glass substrate from the water after a period of between 10 and 120 minutes.
Dependencies are inferred from the claim text.