Calcium sulphase-based products
US11117834B2 · kind B2 · utility
0Cited by
17References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2015 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Apr 4, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/28
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A calcium sulphate-based product including gypsum and a shrinkage resistance additive. The shrinkage resistance additive is a metal nitrate, hydroxide, acetate or sulphate and is preferably provided in an amount greater than 4 wt % (based on the amount of additive and gypsum). The additive may be a nitrate of an alkali metal (e.g. potassium), an alkaline earth metal (e.g. magnesium or calcium), a transition metal (e.g. iron or zinc) or aluminium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.