Fire resistant calcium sulphate-based products
US10584063B2 · kind B2 · utility
3Cited by
14References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2015 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Nov 17, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a calcium sulphate-based product (e.g. a wall board) comprising gypsum, a pozzolan source such as a clay additive, rice husk ash or diatomaceous earth and a metal salt additive. The product may be produced by drying an aqueous slurry comprising calcined gypsum, the pozzolan source and the metal salt additive. The clay additive may be a kaolinitic clay. The metal salt additive may be a magnesium salt e.g. magnesium nitrate, magnesium chloride or magnesium hydroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.