Transparent fire-screening panels
US4873146A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1987 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Nov 27, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/921
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A transparent fire-screening glazing panel has at least one solid intumescent layer comprising a hydrated alkali metal silicate and at least one sheet of glazing material, and the layer of intumescent material contains at least one silicate-stabilizing agent. Suitable stabilizing compounds include at least partially dissociated nitrogenized organic compounds, especially quaternary ammonium compounds such as tetramethylammonium hydroxide. To manufacture such a panel, the silicate-stabilizing agent may be incorporated into an aqueous solution of the intumescent material which is then hardened by drying to form the layer. Alternatively, the silicate-stabilizing agent may be incorporated into an aqueous solution of the intumescent material which is then dried to form grains which are subsequently incorporated into a layer held sandwiched between two sheets of glazing material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.