Gypsum wallboard with enhanced fire resistance, and related coatings and methods
US11702373B2 · kind B2 · utility
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24References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2020 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Oct 30, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/34
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed are an organic binder-based coating; a composite gypsum board containing face and back cover sheets, an outside surface of the back cover sheet bearing the coating; and a method of preparing composite board where the back cover sheet contains the coating on its outer surface. The coating is formed from a composition comprising an alkaline silicate, a solid filler, and optionally, a borate. An enhancing layer can also be applied to the back cover sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.