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US 5,565,273 AGranted
Transparent heat protection element
AssigneeVetrotech AG
InventorsWalter Egli, Horst Seidel, Simon Frommelt, Christoph Giesbrecht
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AssigneeVetrotech AG
InventorsWalter Egli, Horst Seidel, Simon Frommelt, Christoph Giesbrecht
Estimating the term…
The heat protection element comprises carrier elements, for example in the form of glass plates. In an interspace between, in each instance, two glass plates a protection layer comprising a cured polysilicate which is formed of alkali silicate and at least one curing agent is disposed. In the polysilicate, a molar ratio of silicon dioxide to alkali metal oxide is set to be greater than 4:1. The starting composition for the polysilicate is a free-flowable composition having a water content of up to 60 percent and capable of being introduced into the interspace between two carrier elements. After curing the composition, the high water content is retained and the polysilicate has nevertheless good inherent strength and adhesion on the carrier elements.
Transparent heat protection element comprising at least one transparent carrier element and one transparent protective layer comprising hydrous alkali silicate in direct connection with said transparent carrier element, characterized in that the protection layer is a cured but not dried polysilicate formed by a combination of alkali silicate, at least about 44 to 60 percent by weight water and at least one curing agent, and that in the polysilicate, a molar ratio of silicon dioxide to alkali metal oxide is greater than 4:1, the cured polysilicate containing substantially all water that was present in the combination of alkali silicate and curing agent.
Method for the production of a transparent heat protection element using a hydrous alkali silicate, comprising:
Dependencies are inferred from the claim text.