Method of manufacturing gypsum board with improved fire
US11339572B1 · kind B1 · utility
1Cited by
101References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2018 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Jul 17, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/34
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present disclosure is directed to a method of manufacturing gypsum board as well as the resulting gypsum board. The method comprises providing a gypsum slurry with a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. As a result, the gypsum board includes gypsum and a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. The gypsum board exhibits an area shrinkage of less than 10%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.